diff --git a/core/lib/Drupal/Core/Entity/ContentEntityDatabaseStorage.php b/core/lib/Drupal/Core/Entity/ContentEntityDatabaseStorage.php
index 620c474..4a20f49 100644
--- a/core/lib/Drupal/Core/Entity/ContentEntityDatabaseStorage.php
+++ b/core/lib/Drupal/Core/Entity/ContentEntityDatabaseStorage.php
@@ -11,7 +11,6 @@
 use Drupal\Core\Cache\CacheBackendInterface;
 use Drupal\Core\Database\Connection;
 use Drupal\Core\Database\Database;
-use Drupal\Core\Entity\Exception\FieldStorageDefinitionUpdateForbiddenException;
 use Drupal\Core\Entity\Query\QueryInterface;
 use Drupal\Core\Entity\Schema\ContentEntitySchemaProviderInterface;
 use Drupal\Core\Entity\Sql\DefaultTableMapping;
@@ -29,9 +28,8 @@
  *
  * The class uses \Drupal\Core\Entity\Schema\SqlContentEntityStorageSchema
  * internally in order to automatically generate the database schema based on
- * the defined base fields. Entity types can override
- * ContentEntityDatabaseStorage::getSchema() to customize the generated
- * schema; e.g., to add additional indexes.
+ * the defined base fields. Entity types can override the schema handler to
+ * customize the generated schema; e.g., to add additional indexes.
  *
  * @ingroup entity_api
  */
@@ -105,7 +103,7 @@ class ContentEntityDatabaseStorage extends ContentEntityStorageBase implements S
   /**
    * The entity schema handler.
    *
-   * @var \Drupal\Core\Entity\Schema\EntitySchemaHandlerInterface
+   * @var \Drupal\Core\Entity\Schema\ContentEntitySchemaHandlerInterface
    */
   protected $schemaHandler;
 
@@ -153,15 +151,27 @@ public function getFieldStorageDefinitions() {
    */
   public function __construct(EntityTypeInterface $entity_type, Connection $database, EntityManagerInterface $entity_manager, CacheBackendInterface $cache) {
     parent::__construct($entity_type);
-
     $this->database = $database;
     $this->entityManager = $entity_manager;
     $this->cacheBackend = $cache;
+    $this->initTableLayout();
+  }
+
+  /**
+   * Initializes table name variables.
+   */
+  protected function initTableLayout() {
+    // Reset table field values to ensure changes in the entity type definition
+    // are correctly reflected in the table layout.
+    $this->tableMapping = NULL;
+    $this->revisionKey = NULL;
+    $this->revisionTable = NULL;
+    $this->dataTable = NULL;
+    $this->revisionDataTable = NULL;
 
     // @todo Remove table names from the entity type definition in
     //   https://drupal.org/node/2232465
     $this->baseTable = $this->entityType->getBaseTable() ?: $this->entityTypeId;
-
     $revisionable = $this->entityType->isRevisionable();
     if ($revisionable) {
       $this->revisionKey = $this->entityType->getKey('revision') ?: 'revision_id';
@@ -246,18 +256,38 @@ protected function schemaHandler() {
   }
 
   /**
+   * Updates the wrapped entity type definition.
+   *
+   * @param ContentEntityTypeInterface $entity_type
+   *   The update entity type.
+   *
+   * @deprecated in Drupal 8.x-dev, will be removed before Drupal 8.0.
+   *   See https://www.drupal.org/node/2274017.
+   */
+  public function setEntityType(ContentEntityTypeInterface $entity_type) {
+    if ($this->entityType->id() == $entity_type->id()) {
+      $this->entityType = $entity_type;
+      $this->initTableLayout();
+    }
+    else {
+      throw new EntityStorageException(String::format('Unsupported entity type @id', array('@id' => $entity_type->id())));
+    }
+  }
+
+  /**
    * {@inheritdoc}
    */
-  public function getTableMapping() {
-    if (!isset($this->tableMapping)) {
+  public function getTableMapping(array $storage_definitions = NULL) {
+    $table_mapping = $this->tableMapping;
+
+    if (!isset($this->tableMapping) || $storage_definitions) {
+      $definitions = $storage_definitions ?: $this->entityManager->getFieldStorageDefinitions($this->entityTypeId);
+      $base_field_definitions = $this->entityManager->getBaseFieldDefinitions($this->entityTypeId);
+      $table_mapping = new DefaultTableMapping($definitions, $base_field_definitions);
 
-      $definitions = array_filter($this->getFieldStorageDefinitions(), function (FieldStorageDefinitionInterface $definition) {
-        // @todo Remove the check for FieldDefinitionInterface::isMultiple() when
-        //   multiple-value base fields are supported in
-        //   https://drupal.org/node/2248977.
-        return !$definition->hasCustomStorage() && !$definition->isMultiple();
+      $definitions = array_filter($definitions, function (FieldStorageDefinitionInterface $definition) use ($table_mapping) {
+        return $table_mapping->allowsSharedTableStorage($definition);
       });
-      $this->tableMapping = new DefaultTableMapping($definitions);
 
       $key_fields = array_values(array_filter(array($this->idKey, $this->revisionKey, $this->bundleKey, $this->uuidKey, $this->langcodeKey)));
       $all_fields = array_keys($definitions);
@@ -285,16 +315,16 @@ public function getTableMapping() {
       $translatable = $this->entityType->getDataTable() && $this->entityType->isTranslatable();
       if (!$revisionable && !$translatable) {
         // The base layout stores all the base field values in the base table.
-        $this->tableMapping->setFieldNames($this->baseTable, $all_fields);
+        $table_mapping->setFieldNames($this->baseTable, $all_fields);
       }
       elseif ($revisionable && !$translatable) {
         // The revisionable layout stores all the base field values in the base
         // table, except for revision metadata fields. Revisionable fields
         // denormalized in the base table but also stored in the revision table
         // together with the entity ID and the revision ID as identifiers.
-        $this->tableMapping->setFieldNames($this->baseTable, array_diff($all_fields, $revision_metadata_fields));
+        $table_mapping->setFieldNames($this->baseTable, array_diff($all_fields, $revision_metadata_fields));
         $revision_key_fields = array($this->idKey, $this->revisionKey);
-        $this->tableMapping->setFieldNames($this->revisionTable, array_merge($revision_key_fields, $revisionable_fields));
+        $table_mapping->setFieldNames($this->revisionTable, array_merge($revision_key_fields, $revisionable_fields));
       }
       elseif (!$revisionable && $translatable) {
         // Multilingual layouts store key field values in the base table. The
@@ -303,7 +333,7 @@ public function getTableMapping() {
         // denormalized copy of the bundle field value to allow for more
         // performant queries. This means that only the UUID is not stored on
         // the data table.
-        $this->tableMapping
+        $table_mapping
           ->setFieldNames($this->baseTable, $key_fields)
           ->setFieldNames($this->dataTable, array_values(array_diff($all_fields, array($this->uuidKey))))
           // Add the denormalized 'default_langcode' field to the mapping. Its
@@ -319,13 +349,13 @@ public function getTableMapping() {
         // holds the data field values for all non-revisionable fields. The data
         // field values of revisionable fields are denormalized in the data
         // table, as well.
-        $this->tableMapping->setFieldNames($this->baseTable, array_values(array_diff($key_fields, array($this->langcodeKey))));
+        $table_mapping->setFieldNames($this->baseTable, array_values(array_diff($key_fields, array($this->langcodeKey))));
 
         // Like in the multilingual, non-revisionable case the UUID is not
         // in the data table. Additionally, do not store revision metadata
         // fields in the data table.
         $data_fields = array_values(array_diff($all_fields, array($this->uuidKey), $revision_metadata_fields));
-        $this->tableMapping
+        $table_mapping
           ->setFieldNames($this->dataTable, $data_fields)
           // Add the denormalized 'default_langcode' field to the mapping. Its
           // value is identical to the query expression
@@ -334,20 +364,43 @@ public function getTableMapping() {
           ->setExtraColumns($this->dataTable, array('default_langcode'));
 
         $revision_base_fields = array_merge(array($this->idKey, $this->revisionKey, $this->langcodeKey), $revision_metadata_fields);
-        $this->tableMapping->setFieldNames($this->revisionTable, $revision_base_fields);
+        $table_mapping->setFieldNames($this->revisionTable, $revision_base_fields);
 
         $revision_data_key_fields = array($this->idKey, $this->revisionKey, $this->langcodeKey);
-        $revision_data_fields = array_diff($revisionable_fields, $revision_metadata_fields);
-        $this->tableMapping
+        $revision_data_fields = array_diff($revisionable_fields, $revision_metadata_fields, array($this->langcodeKey));
+        $table_mapping
           ->setFieldNames($this->revisionDataTable, array_merge($revision_data_key_fields, $revision_data_fields))
           // Add the denormalized 'default_langcode' field to the mapping. Its
           // value is identical to the query expression
           // "revision_table.langcode = data_table.langcode".
           ->setExtraColumns($this->revisionDataTable, array('default_langcode'));
       }
+
+      // Add dedicated tables.
+      $definitions = array_filter($definitions, function (FieldStorageDefinitionInterface $definition) use ($table_mapping) {
+        return $table_mapping->requiresDedicatedTableStorage($definition);
+      });
+      $extra_columns = array(
+        'bundle',
+        'deleted',
+        'entity_id',
+        'revision_id',
+        'langcode',
+        'delta',
+      );
+      foreach ($definitions as $field_name => $definition) {
+        foreach (array($table_mapping->getDedicatedDataTableName($definition), $table_mapping->getDedicatedRevisionTableName($definition)) as $table_name) {
+          $table_mapping->setFieldNames($table_name, array($field_name));
+          $table_mapping->setExtraColumns($table_name, $extra_columns);
+        }
+      }
+
+      if (!$storage_definitions) {
+        $this->tableMapping = $table_mapping;
+      }
     }
 
-    return $this->tableMapping;
+    return $table_mapping;
   }
 
   /**
@@ -594,7 +647,7 @@ protected function attachPropertyData(array &$entities) {
       $table_mapping = $this->getTableMapping();
       $translations = array();
       if ($this->revisionDataTable) {
-        $data_fields = array_diff_key($table_mapping->getFieldNames($this->revisionDataTable), $table_mapping->getFieldNames($this->baseTable));
+        $data_fields = array_diff($table_mapping->getFieldNames($this->revisionDataTable), $table_mapping->getFieldNames($this->baseTable));
       }
       else {
         $data_fields = $table_mapping->getFieldNames($this->dataTable);
@@ -1163,7 +1216,7 @@ protected function loadFieldItems(array $entities) {
       $definitions[$bundle] = $this->entityManager->getFieldDefinitions($this->entityTypeId, $bundle);
       foreach ($definitions[$bundle] as $field_name => $field_definition) {
         $storage_definition = $field_definition->getFieldStorageDefinition();
-        if ($this->usesDedicatedTable($storage_definition)) {
+        if ($table_mapping->requiresDedicatedTableStorage($storage_definition)) {
           $storage_definitions[$field_name] = $storage_definition;
         }
       }
@@ -1238,7 +1291,7 @@ protected function saveFieldItems(EntityInterface $entity, $update = TRUE) {
 
     foreach ($this->entityManager->getFieldDefinitions($entity_type, $bundle) as $field_name => $field_definition) {
       $storage_definition = $field_definition->getFieldStorageDefinition();
-      if (!$this->usesDedicatedTable($storage_definition)) {
+      if (!$table_mapping->requiresDedicatedTableStorage($storage_definition)) {
         continue;
       }
       $table_name = $table_mapping->getDedicatedDataTableName($storage_definition);
@@ -1253,10 +1306,12 @@ protected function saveFieldItems(EntityInterface $entity, $update = TRUE) {
             ->condition('entity_id', $id)
             ->execute();
         }
-        $this->database->delete($revision_name)
-          ->condition('entity_id', $id)
-          ->condition('revision_id', $vid)
-          ->execute();
+        if ($this->entityType->isRevisionable()) {
+          $this->database->delete($revision_name)
+            ->condition('entity_id', $id)
+            ->condition('revision_id', $vid)
+            ->execute();
+        }
       }
 
       // Prepare the multi-insert query.
@@ -1266,7 +1321,9 @@ protected function saveFieldItems(EntityInterface $entity, $update = TRUE) {
         $columns[] = $table_mapping->getFieldColumnName($storage_definition, $column);
       }
       $query = $this->database->insert($table_name)->fields($columns);
-      $revision_query = $this->database->insert($revision_name)->fields($columns);
+      if ($this->entityType->isRevisionable()) {
+        $revision_query = $this->database->insert($revision_name)->fields($columns);
+      }
 
       $langcodes = $field_definition->isTranslatable() ? $translation_langcodes : array($default_langcode);
       foreach ($langcodes as $langcode) {
@@ -1289,7 +1346,9 @@ protected function saveFieldItems(EntityInterface $entity, $update = TRUE) {
             $record[$column_name] = !empty($attributes['serialize']) ? serialize($item->$column) : $item->$column;
           }
           $query->values($record);
-          $revision_query->values($record);
+          if ($this->entityType->isRevisionable()) {
+            $revision_query->values($record);
+          }
 
           if ($storage_definition->getCardinality() != FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED && ++$delta_count == $storage_definition->getCardinality()) {
             break;
@@ -1304,7 +1363,9 @@ protected function saveFieldItems(EntityInterface $entity, $update = TRUE) {
         if ($entity->isDefaultRevision()) {
           $query->execute();
         }
-        $revision_query->execute();
+        if ($this->entityType->isRevisionable()) {
+          $revision_query->execute();
+        }
       }
     }
   }
@@ -1319,7 +1380,7 @@ protected function deleteFieldItems(EntityInterface $entity) {
     $table_mapping = $this->getTableMapping();
     foreach ($this->entityManager->getFieldDefinitions($entity->getEntityTypeId(), $entity->bundle()) as $field_definition) {
       $storage_definition = $field_definition->getFieldStorageDefinition();
-      if (!$this->usesDedicatedTable($storage_definition)) {
+      if (!$table_mapping->requiresDedicatedTableStorage($storage_definition)) {
         continue;
       }
       $table_name = $table_mapping->getDedicatedDataTableName($storage_definition);
@@ -1327,9 +1388,11 @@ protected function deleteFieldItems(EntityInterface $entity) {
       $this->database->delete($table_name)
         ->condition('entity_id', $entity->id())
         ->execute();
-      $this->database->delete($revision_name)
-        ->condition('entity_id', $entity->id())
-        ->execute();
+      if ($this->entityType->isRevisionable()) {
+        $this->database->delete($revision_name)
+          ->condition('entity_id', $entity->id())
+          ->execute();
+      }
     }
   }
 
@@ -1345,7 +1408,7 @@ protected function deleteFieldItemsRevision(EntityInterface $entity) {
       $table_mapping = $this->getTableMapping();
       foreach ($this->entityManager->getFieldDefinitions($entity->getEntityTypeId(), $entity->bundle()) as $field_definition) {
         $storage_definition = $field_definition->getFieldStorageDefinition();
-        if (!$this->usesDedicatedTable($storage_definition)) {
+        if (!$table_mapping->requiresDedicatedTableStorage($storage_definition)) {
           continue;
         }
         $revision_name = $table_mapping->getDedicatedRevisionTableName($storage_definition);
@@ -1358,21 +1421,6 @@ protected function deleteFieldItemsRevision(EntityInterface $entity) {
   }
 
   /**
-   * Returns whether the field uses a dedicated table for storage.
-   *
-   * @param FieldStorageDefinitionInterface $definition
-   *   The field storage definition.
-   *
-   * @return bool
-   *   Whether the field uses a dedicated table for storage.
-   */
-  protected function usesDedicatedTable(FieldStorageDefinitionInterface $definition) {
-    // Everything that is not provided by the entity type is stored in a
-    // dedicated table.
-    return $definition->getProvider() != $this->entityType->getProvider() && !$definition->hasCustomStorage();
-  }
-
-  /**
    * {@inheritdoc}
    */
   public function requiresEntitySchemaChanges(ContentEntityTypeInterface $definition, ContentEntityTypeInterface $original) {
@@ -1411,6 +1459,12 @@ public function onEntityTypeCreate(EntityTypeInterface $entity_type) {
    * {@inheritdoc}
    */
   public function onEntityTypeUpdate(EntityTypeInterface $entity_type, EntityTypeInterface $original) {
+    // Ensure we have an updated entity type definition.
+    $this->entityType = $this->entityManager->getDefinition($this->entityTypeId);
+    // The table layout may have changed depending on the new entity type
+    // definition.
+    $this->initTableLayout();
+    // Let the schema handler adapt to possible table layout changes.
     $this->schemaHandler()->onEntityTypeUpdate($entity_type, $original);
   }
 
@@ -1425,15 +1479,14 @@ public function onEntityTypeDelete(EntityTypeInterface $entity_type) {
    * {@inheritdoc}
    */
   public function onFieldStorageDefinitionCreate(FieldStorageDefinitionInterface $storage_definition) {
-    $schema = $this->_fieldSqlSchema($storage_definition);
-    foreach ($schema as $name => $table) {
-      $this->database->schema()->createTable($name, $table);
+    // If we are adding a field stored in a shared table we need to recompute
+    // the table mapping.
+    // @todo This does not belong here. Remove it once we are able to generate a
+    //   fresh table mapping in the schema handler. See
+    //   https://www.drupal.org/node/2274017.
+    if ($this->getTableMapping()->allowsSharedTableStorage($storage_definition)) {
+      $this->tableMapping = NULL;
     }
-
-    // @todo Move all of the above code into the schema handler:
-    //   https://www.drupal.org/node/1498720.
-    // Even before doing that, we still forward to the schema handler so that
-    // it can notify the schema manager.
     $this->schemaHandler()->onFieldStorageDefinitionCreate($storage_definition);
   }
 
@@ -1441,91 +1494,6 @@ public function onFieldStorageDefinitionCreate(FieldStorageDefinitionInterface $
    * {@inheritdoc}
    */
   public function onFieldStorageDefinitionUpdate(FieldStorageDefinitionInterface $storage_definition, FieldStorageDefinitionInterface $original) {
-    if (!$storage_definition->hasData()) {
-      // There is no data. Re-create the tables completely.
-
-      if ($this->database->supportsTransactionalDDL()) {
-        // If the database supports transactional DDL, we can go ahead and rely
-        // on it. If not, we will have to rollback manually if something fails.
-        $transaction = $this->database->startTransaction();
-      }
-
-      try {
-        $original_schema = $this->_fieldSqlSchema($original);
-        foreach ($original_schema as $name => $table) {
-          $this->database->schema()->dropTable($name, $table);
-        }
-        $schema = $this->_fieldSqlSchema($storage_definition);
-        foreach ($schema as $name => $table) {
-          $this->database->schema()->createTable($name, $table);
-        }
-      }
-      catch (\Exception $e) {
-        if ($this->database->supportsTransactionalDDL()) {
-          $transaction->rollback();
-        }
-        else {
-          // Recreate tables.
-          $original_schema = $this->_fieldSqlSchema($original);
-          foreach ($original_schema as $name => $table) {
-            if (!$this->database->schema()->tableExists($name)) {
-              $this->database->schema()->createTable($name, $table);
-            }
-          }
-        }
-        throw $e;
-      }
-    }
-    else {
-      if ($storage_definition->getColumns() != $original->getColumns()) {
-        throw new FieldStorageDefinitionUpdateForbiddenException("The SQL storage cannot change the schema for an existing field with data.");
-      }
-      // There is data, so there are no column changes. Drop all the prior
-      // indexes and create all the new ones, except for all the priors that
-      // exist unchanged.
-      $table_mapping = $this->getTableMapping();
-      $table = $table_mapping->getDedicatedDataTableName($original);
-      $revision_table = $table_mapping->getDedicatedRevisionTableName($original);
-
-      $schema = $storage_definition->getSchema();
-      $original_schema = $original->getSchema();
-
-      foreach ($original_schema['indexes'] as $name => $columns) {
-        if (!isset($schema['indexes'][$name]) || $columns != $schema['indexes'][$name]) {
-          $real_name = static::_fieldIndexName($storage_definition, $name);
-          $this->database->schema()->dropIndex($table, $real_name);
-          $this->database->schema()->dropIndex($revision_table, $real_name);
-        }
-      }
-      $table = $table_mapping->getDedicatedDataTableName($storage_definition);
-      $revision_table = $table_mapping->getDedicatedRevisionTableName($storage_definition);
-      foreach ($schema['indexes'] as $name => $columns) {
-        if (!isset($original_schema['indexes'][$name]) || $columns != $original_schema['indexes'][$name]) {
-          $real_name = static::_fieldIndexName($storage_definition, $name);
-          $real_columns = array();
-          foreach ($columns as $column_name) {
-            // Indexes can be specified as either a column name or an array with
-            // column name and length. Allow for either case.
-            if (is_array($column_name)) {
-              $real_columns[] = array(
-                $table_mapping->getFieldColumnName($storage_definition, $column_name[0]),
-                $column_name[1],
-              );
-            }
-            else {
-              $real_columns[] = $table_mapping->getFieldColumnName($storage_definition, $column_name);
-            }
-          }
-          $this->database->schema()->addIndex($table, $real_name, $real_columns);
-          $this->database->schema()->addIndex($revision_table, $real_name, $real_columns);
-        }
-      }
-    }
-
-    // @todo Move all of the above code into the schema handler:
-    //   https://www.drupal.org/node/1498720.
-    // Even before doing that, we still forward to the schema handler so that
-    // it can notify the schema manager.
     $this->schemaHandler()->onFieldStorageDefinitionUpdate($storage_definition, $original);
   }
 
@@ -1535,24 +1503,21 @@ public function onFieldStorageDefinitionUpdate(FieldStorageDefinitionInterface $
   public function onFieldStorageDefinitionDelete(FieldStorageDefinitionInterface $storage_definition) {
     $table_mapping = $this->getTableMapping();
 
-    // Mark all data associated with the field for deletion.
-    $table = $table_mapping->getDedicatedDataTableName($storage_definition);
-    $revision_table = $table_mapping->getDedicatedRevisionTableName($storage_definition);
-    $this->database->update($table)
-      ->fields(array('deleted' => 1))
-      ->execute();
+    if ($table_mapping->requiresDedicatedTableStorage($storage_definition)) {
+      // Mark all data associated with the field for deletion.
+      $table = $table_mapping->getDedicatedDataTableName($storage_definition);
+      $revision_table = $table_mapping->getDedicatedRevisionTableName($storage_definition);
+      $this->database->update($table)
+        ->fields(array('deleted' => 1))
+        ->execute();
+      if ($this->entityType->isRevisionable()) {
+        $this->database->update($revision_table)
+          ->fields(array('deleted' => 1))
+          ->execute();
+      }
+    }
 
-    // Move the table to a unique name while the table contents are being
-    // deleted.
-    $new_table = $table_mapping->getDedicatedDataTableName($storage_definition, TRUE);
-    $revision_new_table = $table_mapping->getDedicatedRevisionTableName($storage_definition, TRUE);
-    $this->database->schema()->renameTable($table, $new_table);
-    $this->database->schema()->renameTable($revision_table, $revision_new_table);
-
-    // @todo Move all of the above code into the schema handler:
-    //   https://www.drupal.org/node/1498720.
-    // Even before doing that, we still forward to the schema handler so that
-    // it can notify the schema manager.
+    // Update the field schema.
     $this->schemaHandler()->onFieldStorageDefinitionDelete($storage_definition);
   }
 
@@ -1563,16 +1528,20 @@ public function onFieldDefinitionDelete(FieldDefinitionInterface $field_definiti
     $table_mapping = $this->getTableMapping();
     $storage_definition = $field_definition->getFieldStorageDefinition();
     // Mark field data as deleted.
-    $table_name = $table_mapping->getDedicatedDataTableName($storage_definition);
-    $revision_name = $table_mapping->getDedicatedRevisionTableName($storage_definition);
-    $this->database->update($table_name)
-      ->fields(array('deleted' => 1))
-      ->condition('bundle', $field_definition->getBundle())
-      ->execute();
-    $this->database->update($revision_name)
-      ->fields(array('deleted' => 1))
-      ->condition('bundle', $field_definition->getBundle())
-      ->execute();
+    if ($table_mapping->requiresDedicatedTableStorage($storage_definition)) {
+      $table_name = $table_mapping->getDedicatedDataTableName($storage_definition);
+      $revision_name = $table_mapping->getDedicatedRevisionTableName($storage_definition);
+      $this->database->update($table_name)
+        ->fields(array('deleted' => 1))
+        ->condition('bundle', $field_definition->getBundle())
+        ->execute();
+      if ($this->entityType->isRevisionable()) {
+        $this->database->update($revision_name)
+          ->fields(array('deleted' => 1))
+          ->condition('bundle', $field_definition->getBundle())
+          ->execute();
+      }
+    }
   }
 
   /**
@@ -1591,7 +1560,7 @@ public function onBundleRename($bundle, $bundle_new) {
 
     foreach ($field_definitions as $field_definition) {
       $storage_definition = $field_definition->getFieldStorageDefinition();
-      if ($this->usesDedicatedTable($storage_definition)) {
+      if ($table_mapping->requiresDedicatedTableStorage($storage_definition)) {
         $is_deleted = $this->storageDefinitionIsDeleted($storage_definition);
         $table_name = $table_mapping->getDedicatedDataTableName($storage_definition, $is_deleted);
         $revision_name = $table_mapping->getDedicatedRevisionTableName($storage_definition, $is_deleted);
@@ -1599,10 +1568,12 @@ public function onBundleRename($bundle, $bundle_new) {
           ->fields(array('bundle' => $bundle_new))
           ->condition('bundle', $bundle)
           ->execute();
-        $this->database->update($revision_name)
-          ->fields(array('bundle' => $bundle_new))
-          ->condition('bundle', $bundle)
-          ->execute();
+        if ($this->entityType->isRevisionable()) {
+          $this->database->update($revision_name)
+            ->fields(array('bundle' => $bundle_new))
+            ->condition('bundle', $bundle)
+            ->execute();
+        }
       }
     }
   }
@@ -1680,20 +1651,18 @@ protected function purgeFieldItems(ContentEntityInterface $entity, FieldDefiniti
     $this->database->delete($table_name)
       ->condition('revision_id', $revision_id)
       ->execute();
-    $this->database->delete($revision_name)
-      ->condition('revision_id', $revision_id)
-      ->execute();
+    if ($this->entityType->isRevisionable()) {
+      $this->database->delete($revision_name)
+        ->condition('revision_id', $revision_id)
+        ->execute();
+    }
   }
 
   /**
    * {@inheritdoc}
    */
   public function finalizePurge(FieldStorageDefinitionInterface $storage_definition) {
-    $table_mapping = $this->getTableMapping();
-    $table_name = $table_mapping->getDedicatedDataTableName($storage_definition, TRUE);
-    $revision_name = $table_mapping->getDedicatedRevisionTableName($storage_definition, TRUE);
-    $this->database->schema()->dropTable($table_name);
-    $this->database->schema()->dropTable($revision_name);
+    $this->schemaHandler()->finalizePurge($storage_definition);
   }
 
   /**
@@ -1702,230 +1671,66 @@ public function finalizePurge(FieldStorageDefinitionInterface $storage_definitio
   public function countFieldData($storage_definition, $as_bool = FALSE) {
     $table_mapping = $this->getTableMapping();
 
-    $is_deleted = $this->storageDefinitionIsDeleted($storage_definition);
-    $table_name = $table_mapping->getDedicatedDataTableName($storage_definition, $is_deleted);
-    $query = $this->database->select($table_name, 't');
-    $or = $query->orConditionGroup();
-    foreach ($storage_definition->getColumns() as $column_name => $data) {
-      $or->isNotNull($table_mapping->getFieldColumnName($storage_definition, $column_name));
-    }
-    $query
-      ->condition($or)
-      ->fields('t', array('entity_id'))
-      ->distinct(TRUE);
-    // If we are performing the query just to check if the field has data
-    // limit the number of rows.
-    if ($as_bool) {
-      $query->range(0, 1);
-    }
-    $count = $query->countQuery()->execute()->fetchField();
-    return $as_bool ? (bool) $count : (int) $count;
-  }
-
-  /**
-   * Returns whether the passed field has been already deleted.
-   *
-   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
-   *   The field storage definition.
-   *
-   * @return bool
-   *   Whether the field has been already deleted.
-   */
-  protected function storageDefinitionIsDeleted(FieldStorageDefinitionInterface $storage_definition) {
-    return !array_key_exists($storage_definition->getName(), $this->entityManager->getFieldStorageDefinitions($this->entityTypeId));
-  }
-
-  /**
-   * Gets the SQL table schema.
-   *
-   * @private Calling this function circumvents the entity system and is
-   * strongly discouraged. This function is not considered part of the public
-   * API and modules relying on it might break even in minor releases.
-   *
-   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
-   *   The field storage definition.
-   * @param array $schema
-   *   The field schema array. Mandatory for upgrades, omit otherwise.
-   * @param bool $deleted
-   *   (optional) Whether the schema of the table holding the values of a
-   *   deleted field should be returned.
-   *
-   * @return array
-   *   The same as a hook_schema() implementation for the data and the
-   *   revision tables.
-   *
-   * @see hook_schema()
-   */
-  public static function _fieldSqlSchema(FieldStorageDefinitionInterface $storage_definition, array $schema = NULL, $deleted = FALSE) {
-    $table_mapping = new DefaultTableMapping(array());
-
-    $description_current = "Data storage for {$storage_definition->getTargetEntityTypeId()} field {$storage_definition->getName()}.";
-    $description_revision = "Revision archive storage for {$storage_definition->getTargetEntityTypeId()} field {$storage_definition->getName()}.";
-
-    $entity_type_id = $storage_definition->getTargetEntityTypeId();
-    $entity_manager = \Drupal::entityManager();
-    $entity_type = $entity_manager->getDefinition($entity_type_id);
-    $definitions = $entity_manager->getBaseFieldDefinitions($entity_type_id);
-
-    // Define the entity ID schema based on the field definitions.
-    $id_definition = $definitions[$entity_type->getKey('id')];
-    if ($id_definition->getType() == 'integer') {
-      $id_schema = array(
-        'type' => 'int',
-        'unsigned' => TRUE,
-        'not null' => TRUE,
-        'description' => 'The entity id this data is attached to',
-      );
-    }
-    else {
-      $id_schema = array(
-        'type' => 'varchar',
-        'length' => 128,
-        'not null' => TRUE,
-        'description' => 'The entity id this data is attached to',
-      );
-    }
-
-    // Define the revision ID schema, default to integer if there is no revision
-    // ID.
-    $revision_id_definition = $entity_type->hasKey('revision') ? $definitions[$entity_type->getKey('revision')] : NULL;
-    if (!$revision_id_definition || $revision_id_definition->getType() == 'integer') {
-      $revision_id_schema = array(
-        'type' => 'int',
-        'unsigned' => TRUE,
-        'not null' => FALSE,
-        'description' => 'The entity revision id this data is attached to, or NULL if the entity type is not versioned',
-      );
+    if ($table_mapping->requiresDedicatedTableStorage($storage_definition)) {
+      $is_deleted = $this->storageDefinitionIsDeleted($storage_definition);
+      $table_name = $table_mapping->getDedicatedDataTableName($storage_definition, $is_deleted);
+      $query = $this->database->select($table_name, 't');
+      $or = $query->orConditionGroup();
+      foreach ($storage_definition->getColumns() as $column_name => $data) {
+        $or->isNotNull($table_mapping->getFieldColumnName($storage_definition, $column_name));
+      }
+      $query
+        ->condition($or)
+        ->fields('t', array('entity_id'))
+        ->distinct(TRUE);
+      // If we are performing the query just to check if the field has data
+      // limit the number of rows.
+      if ($as_bool) {
+        $query->range(0, 1);
+      }
+      $count = $query->countQuery()->execute()->fetchField();
     }
     else {
-      $revision_id_schema = array(
-        'type' => 'varchar',
-        'length' => 128,
-        'not null' => FALSE,
-        'description' => 'The entity revision id this data is attached to, or NULL if the entity type is not versioned',
-      );
-    }
-
-    $current = array(
-      'description' => $description_current,
-      'fields' => array(
-        'bundle' => array(
-          'type' => 'varchar',
-          'length' => 128,
-          'not null' => TRUE,
-          'default' => '',
-          'description' => 'The field instance bundle to which this row belongs, used when deleting a field instance',
-        ),
-        'deleted' => array(
-          'type' => 'int',
-          'size' => 'tiny',
-          'not null' => TRUE,
-          'default' => 0,
-          'description' => 'A boolean indicating whether this data item has been deleted'
-        ),
-        'entity_id' => $id_schema,
-        'revision_id' => $revision_id_schema,
-        'langcode' => array(
-          'type' => 'varchar',
-          'length' => 32,
-          'not null' => TRUE,
-          'default' => '',
-          'description' => 'The language code for this data item.',
-        ),
-        'delta' => array(
-          'type' => 'int',
-          'unsigned' => TRUE,
-          'not null' => TRUE,
-          'description' => 'The sequence number for this data item, used for multi-value fields',
-        ),
-      ),
-      'primary key' => array('entity_id', 'deleted', 'delta', 'langcode'),
-      'indexes' => array(
-        'bundle' => array('bundle'),
-        'deleted' => array('deleted'),
-        'entity_id' => array('entity_id'),
-        'revision_id' => array('revision_id'),
-        'langcode' => array('langcode'),
-      ),
-    );
-
-    if (!$schema) {
-      $schema = $storage_definition->getSchema();
-    }
-
-    // Add field columns.
-    foreach ($schema['columns'] as $column_name => $attributes) {
-      $real_name = $table_mapping->getFieldColumnName($storage_definition, $column_name);
-      $current['fields'][$real_name] = $attributes;
-    }
-
-    // Add unique keys.
-    foreach ($schema['unique keys'] as $unique_key_name => $columns) {
-      $real_name = static::_fieldIndexName($storage_definition, $unique_key_name);
-      foreach ($columns as $column_name) {
-        $current['unique keys'][$real_name][] = $table_mapping->getFieldColumnName($storage_definition, $column_name);
+      if ($as_bool) {
+        $count = $this->hasData();
       }
-    }
-
-    // Add indexes.
-    foreach ($schema['indexes'] as $index_name => $columns) {
-      $real_name = static::_fieldIndexName($storage_definition, $index_name);
-      foreach ($columns as $column_name) {
-        // Indexes can be specified as either a column name or an array with
-        // column name and length. Allow for either case.
-        if (is_array($column_name)) {
-          $current['indexes'][$real_name][] = array(
-            $table_mapping->getFieldColumnName($storage_definition, $column_name[0]),
-            $column_name[1],
-          );
+      else {
+        $data_table = $this->dataTable ?: $this->baseTable;
+        $query = $this->database->select($data_table, 't');
+        $columns = $storage_definition->getColumns();
+        if (count($columns) > 1) {
+          $or = $query->orConditionGroup();
+          foreach ($columns as $column_name => $data) {
+            $or->isNotNull($table_mapping->getFieldColumnName($storage_definition, $column_name));
+          }
+          $query->condition($or);
         }
         else {
-          $current['indexes'][$real_name][] = $table_mapping->getFieldColumnName($storage_definition, $column_name);
+          $query->isNotNull($storage_definition->getName());
         }
+        $count = $query
+          ->fields('t', array($this->idKey))
+          ->distinct(TRUE)
+          ->countQuery()
+          ->execute()
+          ->fetchField();
       }
     }
 
-    // Add foreign keys.
-    foreach ($schema['foreign keys'] as $specifier => $specification) {
-      $real_name = static::_fieldIndexName($storage_definition, $specifier);
-      $current['foreign keys'][$real_name]['table'] = $specification['table'];
-      foreach ($specification['columns'] as $column_name => $referenced) {
-        $sql_storage_column = $table_mapping->getFieldColumnName($storage_definition, $column_name);
-        $current['foreign keys'][$real_name]['columns'][$sql_storage_column] = $referenced;
-      }
-    }
-
-    // Construct the revision table.
-    $revision = $current;
-    $revision['description'] = $description_revision;
-    $revision['primary key'] = array('entity_id', 'revision_id', 'deleted', 'delta', 'langcode');
-    $revision['fields']['revision_id']['not null'] = TRUE;
-    $revision['fields']['revision_id']['description'] = 'The entity revision id this data is attached to';
-
-    return array(
-      $table_mapping->getDedicatedDataTableName($storage_definition) => $current,
-      $table_mapping->getDedicatedRevisionTableName($storage_definition) => $revision,
-    );
+    return $as_bool ? (bool) $count : (int) $count;
   }
 
   /**
-   * Generates an index name for a field data table.
-   *
-   * @private Calling this function circumvents the entity system and is
-   * strongly discouraged. This function is not considered part of the public
-   * API and modules relying on it might break even in minor releases.
+   * Returns whether the passed field has been already deleted.
    *
    * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
    *   The field storage definition.
-   * @param string $index
-   *   The name of the index.
    *
-   * @return string
-   *   A string containing a generated index name for a field data table that is
-   *   unique among all other fields.
+   * @return bool
+   *   Whether the field has been already deleted.
    */
-  public static function _fieldIndexName(FieldStorageDefinitionInterface $storage_definition, $index) {
-    return $storage_definition->getName() . '_' . $index;
+  protected function storageDefinitionIsDeleted(FieldStorageDefinitionInterface $storage_definition) {
+    return !array_key_exists($storage_definition->getName(), $this->entityManager->getFieldStorageDefinitions($this->entityTypeId));
   }
 
 }
diff --git a/core/lib/Drupal/Core/Entity/Schema/ContentEntitySchemaHandlerInterface.php b/core/lib/Drupal/Core/Entity/Schema/ContentEntitySchemaHandlerInterface.php
index c7bb557..43b1d97 100644
--- a/core/lib/Drupal/Core/Entity/Schema/ContentEntitySchemaHandlerInterface.php
+++ b/core/lib/Drupal/Core/Entity/Schema/ContentEntitySchemaHandlerInterface.php
@@ -6,10 +6,20 @@
  */
 
 namespace Drupal\Core\Entity\Schema;
+use Drupal\Core\Field\FieldStorageDefinitionInterface;
 use Drupal\Core\Field\FieldStorageDefinitionListenerInterface;
 
 /**
  * Defines an interface for handling the storage schema of content entities.
  */
 interface ContentEntitySchemaHandlerInterface extends EntitySchemaHandlerInterface, FieldStorageDefinitionListenerInterface {
+
+  /**
+   * Performs final cleanup after all data of a field has been purged.
+   *
+   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
+   *   The field being purged.
+   */
+  public function finalizePurge(FieldStorageDefinitionInterface $storage_definition);
+
 }
diff --git a/core/lib/Drupal/Core/Entity/Schema/SqlContentEntityStorageSchema.php b/core/lib/Drupal/Core/Entity/Schema/SqlContentEntityStorageSchema.php
index 1572478..69baa5d 100644
--- a/core/lib/Drupal/Core/Entity/Schema/SqlContentEntityStorageSchema.php
+++ b/core/lib/Drupal/Core/Entity/Schema/SqlContentEntityStorageSchema.php
@@ -14,6 +14,8 @@
 use Drupal\Core\Entity\EntityManagerInterface;
 use Drupal\Core\Entity\EntityStorageException;
 use Drupal\Core\Entity\EntityTypeInterface;
+use Drupal\Core\Entity\Exception\FieldStorageDefinitionUpdateForbiddenException;
+use Drupal\Core\Field\FieldException;
 use Drupal\Core\Field\FieldStorageDefinitionInterface;
 
 /**
@@ -22,6 +24,13 @@
 class SqlContentEntityStorageSchema implements ContentEntitySchemaHandlerInterface, ContentEntitySchemaProviderInterface {
 
   /**
+   * The entity manager.
+   *
+   * @var \Drupal\Core\Entity\EntityManagerInterface
+   */
+  protected $entityManager;
+
+  /**
    * The entity type this schema builder is responsible for.
    *
    * @var \Drupal\Core\Entity\ContentEntityTypeInterface
@@ -36,6 +45,14 @@ class SqlContentEntityStorageSchema implements ContentEntitySchemaHandlerInterfa
   protected $fieldStorageDefinitions;
 
   /**
+   * The original storage field definitions for this entity type. Used during
+   * field schema updates.
+   *
+   * @var \Drupal\Core\Field\FieldDefinitionInterface[]
+   */
+  protected $originalDefinitions;
+
+  /**
    * The storage object for the given entity type.
    *
    * @var \Drupal\Core\Entity\ContentEntityDatabaseStorage
@@ -83,6 +100,7 @@ class SqlContentEntityStorageSchema implements ContentEntitySchemaHandlerInterfa
    *   The database connection to be used.
    */
   public function __construct(EntityManagerInterface $entity_manager, ContentEntityTypeInterface $entity_type, ContentEntityDatabaseStorage $storage, Connection $database) {
+    $this->entityManager = $entity_manager;
     $this->entityType = $entity_type;
     $this->fieldStorageDefinitions = $entity_manager->getFieldStorageDefinitions($entity_type->id());
     $this->storage = $storage;
@@ -114,11 +132,11 @@ protected function schemaManager() {
    */
   public function requiresEntitySchemaChanges(ContentEntityTypeInterface $definition, ContentEntityTypeInterface $original) {
     return !$original ||
-    $original->getStorageClass() != $definition->getStorageClass() ||
-    $original->isRevisionable() != $definition->isRevisionable() ||
-    $original->isTranslatable() != $definition->isTranslatable() ||
-    // Detect changes in key or index definitions.
-    $this->loadEntitySchemaData($original) != $this->getEntitySchemaData($definition, $this->getEntitySchema($definition, TRUE));
+      $original->getStorageClass() != $definition->getStorageClass() ||
+      $original->isRevisionable() != $definition->isRevisionable() ||
+      $original->isTranslatable() != $definition->isTranslatable() ||
+      // Detect changes in key or index definitions.
+      $this->loadEntitySchemaData($original) != $this->getEntitySchemaData($definition, $this->getEntitySchema($definition, TRUE));
   }
 
   /**
@@ -126,10 +144,10 @@ public function requiresEntitySchemaChanges(ContentEntityTypeInterface $definiti
    */
   public function requiresFieldSchemaChanges(FieldStorageDefinitionInterface $definition, FieldStorageDefinitionInterface $original) {
     return !$original ||
-    $original->getSchema() != $definition->getSchema() ||
-    $original->isRevisionable() != $definition->isRevisionable() ||
-    $original->hasCustomStorage() != $definition->hasCustomStorage() ||
-    $this->requiresFieldDataMigration($definition, $original);
+      $original->getSchema() != $definition->getSchema() ||
+      $original->isRevisionable() != $definition->isRevisionable() ||
+      $original->hasCustomStorage() != $definition->hasCustomStorage() ||
+      $this->requiresFieldDataMigration($definition, $original);
   }
 
   /**
@@ -142,26 +160,30 @@ public function requiresEntityDataMigration(ContentEntityTypeInterface $definiti
     // revisionable to non revisionable, as in that case we just need to drop
     // revision tables.
     return $original->getStorageClass() != $definition->getStorageClass() ||
-    $original->isRevisionable() != $definition->isRevisionable() ||
-    $original->isTranslatable() != $definition->isTranslatable();
+      $original->isRevisionable() != $definition->isRevisionable() ||
+      $original->isTranslatable() != $definition->isTranslatable();
   }
 
   /**
    * {@inheritdoc}
    */
   public function requiresFieldDataMigration(FieldStorageDefinitionInterface $definition, FieldStorageDefinitionInterface $original) {
+    $table_mapping = $this->storage->getTableMapping();
+
     // If the field changes its custom storage status, we will need to create or
     // drop its schema. In any case we cannot migrate its data as custom storage
-    // is involved.
-    if ($original->hasCustomStorage() || $definition->hasCustomStorage()) {
+    // is involved. Otherwise if a field is moved from a shared table to a
+    // dedicated table or viceversa we need a data migration.
+    $custom_storage = $original->hasCustomStorage() || $definition->hasCustomStorage();
+    $shared_table_changed = $table_mapping->allowsSharedTableStorage($original) != $table_mapping->allowsSharedTableStorage($definition);
+    $dedicated_table_changed = $table_mapping->requiresDedicatedTableStorage($original) != $table_mapping->requiresDedicatedTableStorage($definition);
+    if (!$custom_storage && ($shared_table_changed || $dedicated_table_changed)) {
       return TRUE;
     }
     // If columns change we may need data manipulation, which we cannot handle.
     if ($original->getColumns() != $definition->getColumns()) {
       return TRUE;
     }
-    // @todo Add additional checks for field storage changes that can affect
-    //   table layout: https://www.drupal.org/node/1498720.
 
     return FALSE;
   }
@@ -199,6 +221,14 @@ public function onEntityTypeUpdate(EntityTypeInterface $entity_type, EntityTypeI
       try {
         $this->onEntityTypeDelete($original);
         $this->onEntityTypeCreate($entity_type);
+
+        // Update dedicated table revision schema.
+        if ($original->isRevisionable() && !$entity_type->isRevisionable()) {
+          $this->dropDedicatedTableRevisionSchema();
+        }
+        elseif (!$original->isRevisionable() && $entity_type->isRevisionable()) {
+          $this->createDedicatedTableRevisionSchema($entity_type);
+        }
       }
       catch (\Exception $e) {
         if ($this->database->supportsTransactionalDDL()) {
@@ -255,18 +285,26 @@ public function onEntityTypeUpdate(EntityTypeInterface $entity_type, EntityTypeI
   public function onEntityTypeDelete(EntityTypeInterface $entity_type) {
     $this->checkEntityType($entity_type);
     $schema_handler = $this->database->schema();
+    $actual_definition = $this->entityManager->getDefinition($entity_type->id());
+    // @todo Instead of switching the wrapped entity type, we should be able to
+    //   instantiate a new table mapping for each entity type definition. See
+    //   https://www.drupal.org/node/2274017.
+    $this->storage->setEntityType($entity_type);
+
     foreach ($this->getEntitySchemaTables() as $table_name) {
       if ($schema_handler->tableExists($table_name)) {
         $schema_handler->dropTable($table_name);
       }
     }
-    $this->schemaManager()->onEntityTypeDelete($entity_type);
+
+    $this->storage->setEntityType($actual_definition);
   }
 
   /**
    * {@inheritdoc}
    */
   public function onFieldStorageDefinitionCreate(FieldStorageDefinitionInterface $storage_definition) {
+    $this->performFieldSchemaOperation('create', $storage_definition);
     $this->schemaManager()->onFieldStorageDefinitionCreate($storage_definition);
   }
 
@@ -274,6 +312,12 @@ public function onFieldStorageDefinitionCreate(FieldStorageDefinitionInterface $
    * {@inheritdoc}
    */
   public function onFieldStorageDefinitionUpdate(FieldStorageDefinitionInterface $storage_definition, FieldStorageDefinitionInterface $original) {
+    // Store original definitions so that switching between shared and dedicated
+    // field table layout works.
+    $this->originalDefinitions = $this->fieldStorageDefinitions;
+    $this->originalDefinitions[$original->getName()] = $original;
+    $this->performFieldSchemaOperation('update', $storage_definition, $original);
+    $this->originalDefinitions = NULL;
     $this->schemaManager()->onFieldStorageDefinitionUpdate($storage_definition, $original);
   }
 
@@ -281,25 +325,46 @@ public function onFieldStorageDefinitionUpdate(FieldStorageDefinitionInterface $
    * {@inheritdoc}
    */
   public function onFieldStorageDefinitionDelete(FieldStorageDefinitionInterface $storage_definition) {
+    $this->prepareFieldSchemaDeletion($storage_definition);
     $this->schemaManager()->onFieldStorageDefinitionDelete($storage_definition);
   }
 
   /**
-   * Checks that we are dealing with the correct entity type.
+   * {@inheritdoc}
+   */
+  public function finalizePurge(FieldStorageDefinitionInterface $storage_definition) {
+    $this->performFieldSchemaOperation('delete', $storage_definition);
+  }
+
+  /**
+   * Creates revision tables for the specified entity type.
    *
    * @param \Drupal\Core\Entity\ContentEntityTypeInterface $entity_type
-   *   The entity type to be checked.
-   *
-   * @return bool
-   *   TRUE if the entity type matches the current one.
-   *
-   * @throws \Drupal\Core\Entity\EntityStorageException
+   *   The entity type definition.
    */
-  protected function checkEntityType(ContentEntityTypeInterface $entity_type) {
-    if ($entity_type->id() != $this->entityType->id()) {
-      throw new EntityStorageException(String::format('Unsupported entity type @id', array('@id' => $entity_type->id())));
+  protected function createDedicatedTableRevisionSchema(ContentEntityTypeInterface $entity_type) {
+    $table_mapping = $this->storage->getTableMapping();
+    $schema_manager = $this->database->schema();
+    foreach ($this->fieldStorageDefinitions as $definition) {
+      if ($table_mapping->requiresDedicatedTableStorage($definition)) {
+        $schema = $this->getDedicatedTableSchema($definition, $entity_type);
+        $table_name = $table_mapping->getDedicatedRevisionTableName($definition);
+        $schema_manager->createTable($table_name, $schema[$table_name]);
+      }
+    }
+  }
+
+  /**
+   * Deletes revision tables for the specified entity type.
+   */
+  protected function dropDedicatedTableRevisionSchema() {
+    $table_mapping = $this->storage->getTableMapping();
+    $schema_manager = $this->database->schema();
+    foreach ($this->fieldStorageDefinitions as $definition) {
+      if ($table_mapping->requiresDedicatedTableStorage($definition)) {
+        $schema_manager->dropTable($table_mapping->getDedicatedRevisionTableName($definition));
+      }
     }
-    return TRUE;
   }
 
   /**
@@ -314,30 +379,54 @@ protected function checkEntityType(ContentEntityTypeInterface $entity_type) {
    * @return array
    *   A Schema API array describing the entity schema, excluding dedicated
    *   field tables.
+   *
+   * @throws \Drupal\Core\Field\FieldException
    */
   protected function getEntitySchema(ContentEntityTypeInterface $entity_type, $reset = FALSE) {
+    $this->checkEntityType($entity_type);
     $entity_type_id = $entity_type->id();
 
     if (!isset($this->schema[$entity_type_id]) || $reset) {
-      // Initialize the table schema.
+      // Back up the storage definition and replace it with the passed one.
+      // @todo Instead of switching the wrapped entity type, we should be able
+      //   to instantiate a new table mapping for each entity type definition.
+      //   See https://www.drupal.org/node/2274017.
+      $actual_definition = $this->entityManager->getDefinition($entity_type_id);
+      $this->storage->setEntityType($entity_type);
+
+      // Prepare basic information about the entity type.
       $tables = $this->getEntitySchemaTables();
-      $schema[$tables['base_table']] = $this->initializeBaseTable();
+
+      // Initialize the table schema.
+      $schema[$tables['base_table']] = $this->initializeBaseTable($entity_type);
       if (isset($tables['revision_table'])) {
-        $schema[$tables['revision_table']] = $this->initializeRevisionTable();
+        $schema[$tables['revision_table']] = $this->initializeRevisionTable($entity_type);
       }
       if (isset($tables['data_table'])) {
-        $schema[$tables['data_table']] = $this->initializeDataTable();
+        $schema[$tables['data_table']] = $this->initializeDataTable($entity_type);
       }
       if (isset($tables['revision_data_table'])) {
-        $schema[$tables['revision_data_table']] = $this->initializeRevisionDataTable();
+        $schema[$tables['revision_data_table']] = $this->initializeRevisionDataTable($entity_type);
       }
 
+      // We need to act only on shared entity schema tables.
       $table_mapping = $this->storage->getTableMapping();
-      foreach ($table_mapping->getTableNames() as $table_name) {
-        // Add the schema from field definitions.
+      $table_names = array_diff($table_mapping->getTableNames(), $table_mapping->getDedicatedTableNames());
+      $storage_definitions = $this->entityManager->getFieldStorageDefinitions($entity_type_id);
+      foreach ($table_names as $table_name) {
+        if (!isset($schema[$table_name])) {
+          $schema[$table_name] = array();
+        }
         foreach ($table_mapping->getFieldNames($table_name) as $field_name) {
-          $column_names = $table_mapping->getColumnNames($field_name);
-          $this->addFieldSchema($schema[$table_name], $field_name, $column_names);
+          if (!isset($storage_definitions[$field_name])) {
+            throw new FieldException(String::format('Fieled storage definition for "@field_name" could not be found.', array('@field_name' => $field_name)));
+          }
+          // Add the schema for base field definitions.
+          elseif ($table_mapping->allowsSharedTableStorage($storage_definitions[$field_name])) {
+            $column_names = $table_mapping->getColumnNames($field_name);
+            $storage_definition = $storage_definitions[$field_name];
+            $schema[$table_name] = array_merge_recursive($schema[$table_name], $this->getSharedTableFieldSchema($storage_definition, $column_names));
+          }
         }
 
         // Add the schema for extra fields.
@@ -349,24 +438,45 @@ protected function getEntitySchema(ContentEntityTypeInterface $entity_type, $res
       }
 
       // Process tables after having gathered field information.
-      $this->processBaseTable($schema[$tables['base_table']]);
+      $this->processBaseTable($entity_type, $schema[$tables['base_table']]);
       if (isset($tables['revision_table'])) {
-        $this->processRevisionTable($schema[$tables['revision_table']]);
+        $this->processRevisionTable($entity_type, $schema[$tables['revision_table']]);
       }
       if (isset($tables['data_table'])) {
-        $this->processDataTable($schema[$tables['data_table']]);
+        $this->processDataTable($entity_type, $schema[$tables['data_table']]);
       }
       if (isset($tables['revision_data_table'])) {
-        $this->processRevisionDataTable($schema[$tables['revision_data_table']]);
+        $this->processRevisionDataTable($entity_type, $schema[$tables['revision_data_table']]);
       }
 
       $this->schema[$entity_type_id] = $schema;
+
+      // Restore the actual definition.
+      $this->storage->setEntityType($actual_definition);
     }
 
     return $this->schema[$entity_type_id];
   }
 
   /**
+   * Checks that we are dealing with the correct entity type.
+   *
+   * @param \Drupal\Core\Entity\ContentEntityTypeInterface $entity_type
+   *   The entity type to be checked.
+   *
+   * @return bool
+   *   TRUE if the entity type matches the current one.
+   *
+   * @throws \Drupal\Core\Entity\EntityStorageException
+   */
+  protected function checkEntityType(ContentEntityTypeInterface $entity_type) {
+    if ($entity_type->id() != $this->entityType->id()) {
+      throw new EntityStorageException(String::format('Unsupported entity type @id', array('@id' => $entity_type->id())));
+    }
+    return TRUE;
+  }
+
+  /**
    * Gets a list of entity type tables.
    *
    * @return array
@@ -446,144 +556,675 @@ protected function saveEntitySchemaData(ContentEntityTypeInterface $entity_type,
   }
 
   /**
-   * Returns the schema for a single field definition.
+   * Initializes common information for a base table.
    *
-   * @param array $schema
-   *   The table schema to add the field schema to, passed by reference.
-   * @param string $field_name
-   *   The name of the field.
-   * @param string[] $column_mapping
-   *   A mapping of field column names to database column names.
+   * @param \Drupal\Core\Entity\ContentEntityTypeInterface $entity_type
+   *   The entity type.
+   *
+   * @return array
+   *   A partial schema array for the base table.
    */
-  protected function addFieldSchema(array &$schema, $field_name, array $column_mapping) {
-    $field_schema = $this->fieldStorageDefinitions[$field_name]->getSchema();
-    $field_description = $this->fieldStorageDefinitions[$field_name]->getDescription();
-
-    foreach ($column_mapping as $field_column_name => $schema_field_name) {
-      $column_schema = $field_schema['columns'][$field_column_name];
+  protected function initializeBaseTable(ContentEntityTypeInterface $entity_type) {
+    $entity_type_id = $entity_type->id();
 
-      $schema['fields'][$schema_field_name] = $column_schema;
-      $schema['fields'][$schema_field_name]['description'] = $field_description;
-      // Only entity keys are required.
-      $keys = $this->entityType->getKeys() + array('langcode' => 'langcode');
-      // The label is an entity key, but label fields are not necessarily
-      // required.
-      // Because entity ID and revision ID are both serial fields in the base
-      // and revision table respectively, the revision ID is not known yet, when
-      // inserting data into the base table. Instead the revision ID in the base
-      // table is updated after the data has been inserted into the revision
-      // table. For this reason the revision ID field cannot be marked as NOT
-      // NULL.
-      unset($keys['label'], $keys['revision']);
-      // Key fields may not be NULL.
-      if (in_array($field_name, $keys)) {
-        $schema['fields'][$schema_field_name]['not null'] = TRUE;
-      }
-    }
+    $schema = array(
+      'description' => "The base table for $entity_type_id entities.",
+      'primary key' => array($entity_type->getKey('id')),
+      'indexes' => array(),
+      'foreign keys' => array(),
+    );
 
-    if (!empty($field_schema['indexes'])) {
-      $indexes = $this->getFieldIndexes($field_name, $field_schema, $column_mapping);
-      $schema['indexes'] = array_merge($schema['indexes'], $indexes);
+    if ($entity_type->hasKey('revision')) {
+      $revision_key = $entity_type->getKey('revision');
+      $key_name = $this->getEntityIndexName($entity_type, $revision_key);
+      $schema['unique keys'][$key_name] = array($revision_key);
+      $schema['foreign keys'][$entity_type_id . '__revision'] = array(
+        'table' => $this->storage->getRevisionTable(),
+        'columns' => array($revision_key => $revision_key),
+      );
     }
 
-    if (!empty($field_schema['unique keys'])) {
-      $unique_keys = $this->getFieldUniqueKeys($field_name, $field_schema, $column_mapping);
-      $schema['unique keys'] = array_merge($schema['unique keys'], $unique_keys);
-    }
+    $this->addTableDefaults($schema);
 
-    if (!empty($field_schema['foreign keys'])) {
-      $foreign_keys = $this->getFieldForeignKeys($field_name, $field_schema, $column_mapping);
-      $schema['foreign keys'] = array_merge($schema['foreign keys'], $foreign_keys);
-    }
+    return $schema;
   }
 
   /**
-   * Returns an index schema array for a given field.
+   * Initializes common information for a revision table.
    *
-   * @param string $field_name
-   *   The name of the field.
-   * @param array $field_schema
-   *   The schema of the field.
-   * @param string[] $column_mapping
-   *   A mapping of field column names to database column names.
+   * @param \Drupal\Core\Entity\ContentEntityTypeInterface $entity_type
+   *   The entity type.
    *
    * @return array
-   *   The schema definition for the indexes.
+   *   A partial schema array for the revision table.
    */
-  protected function getFieldIndexes($field_name, array $field_schema, array $column_mapping) {
-    return $this->getFieldSchemaData($field_name, $field_schema, $column_mapping, 'indexes');
+  protected function initializeRevisionTable(ContentEntityTypeInterface $entity_type) {
+    $entity_type_id = $entity_type->id();
+    $id_key = $entity_type->getKey('id');
+    $revision_key = $entity_type->getKey('revision');
+
+    $schema = array(
+      'description' => "The revision table for $entity_type_id entities.",
+      'primary key' => array($revision_key),
+      'indexes' => array(),
+      'foreign keys' => array(
+        $entity_type_id . '__revisioned' => array(
+          'table' => $this->storage->getBaseTable(),
+          'columns' => array($id_key => $id_key),
+        ),
+      ),
+    );
+
+    $schema['indexes'][$this->getEntityIndexName($entity_type, $id_key)] = array($id_key);
+
+    $this->addTableDefaults($schema);
+
+    return $schema;
   }
 
   /**
-   * Returns a unique key schema array for a given field.
+   * Initializes common information for a data table.
    *
-   * @param string $field_name
-   *   The name of the field.
-   * @param array $field_schema
-   *   The schema of the field.
-   * @param string[] $column_mapping
-   *   A mapping of field column names to database column names.
+   * @param \Drupal\Core\Entity\ContentEntityTypeInterface $entity_type
+   *   The entity type.
    *
    * @return array
-   *   The schema definition for the unique keys.
+   *   A partial schema array for the data table.
    */
-  protected function getFieldUniqueKeys($field_name, array $field_schema, array $column_mapping) {
-    return $this->getFieldSchemaData($field_name, $field_schema, $column_mapping, 'unique keys');
+  protected function initializeDataTable(ContentEntityTypeInterface $entity_type) {
+    $entity_type_id = $entity_type->id();
+    $id_key = $entity_type->getKey('id');
+
+    $schema = array(
+      'description' => "The data table for $entity_type_id entities.",
+      // @todo Use the language entity key when https://drupal.org/node/2143729
+      //   is in.
+      'primary key' => array($id_key, 'langcode'),
+      'indexes' => array(),
+      'foreign keys' => array(
+        $entity_type_id => array(
+          'table' => $this->storage->getBaseTable(),
+          'columns' => array($id_key => $id_key),
+        ),
+      ),
+    );
+
+    if ($entity_type->hasKey('revision')) {
+      $key = $entity_type->getKey('revision');
+      $schema['indexes'][$this->getEntityIndexName($entity_type, $key)] = array($key);
+    }
+
+    $this->addTableDefaults($schema);
+
+    return $schema;
   }
 
   /**
-   * Returns field schema data for the given key.
+   * Initializes common information for a revision data table.
    *
-   * @param string $field_name
-   *   The name of the field.
-   * @param array $field_schema
-   *   The schema of the field.
-   * @param string[] $column_mapping
-   *   A mapping of field column names to database column names.
-   * @param string $schema_key
-   *   The type of schema data. Either 'indexes' or 'unique keys'.
+   * @param \Drupal\Core\Entity\ContentEntityTypeInterface $entity_type
+   *   The entity type.
    *
    * @return array
-   *   The schema definition for the specified key.
+   *   A partial schema array for the revision data table.
    */
-  protected function getFieldSchemaData($field_name, array $field_schema, array $column_mapping, $schema_key) {
-    $data = array();
+  protected function initializeRevisionDataTable(ContentEntityTypeInterface $entity_type) {
+    $entity_type_id = $entity_type->id();
+    $id_key = $entity_type->getKey('id');
+    $revision_key = $entity_type->getKey('revision');
 
-    foreach ($field_schema[$schema_key] as $key => $columns) {
-      // To avoid clashes with entity-level indexes or unique keys we use
-      // "{$entity_type_id}_field__" as a prefix instead of just
-      // "{$entity_type_id}__". We additionally namespace the specifier by the
-      // field name to avoid clashes when multiple fields of the same type are
-      // added to an entity type.
-      $entity_type_id = $this->entityType->id();
-      $real_key = $this->getFieldSchemaIdentifierName($entity_type_id, $field_name, $key);
-      foreach ($columns as $column) {
-        // Allow for indexes and unique keys to specified as an array of column
-        // name and length.
-        if (is_array($column)) {
-          list($column_name, $length) = $column;
-          $data[$real_key][] = array($column_mapping[$column_name], $length);
-        }
-        else {
-          $data[$real_key][] = $column_mapping[$column];
-        }
-      }
-    }
+    $schema = array(
+      'description' => "The revision data table for $entity_type_id entities.",
+      // @todo Use the language entity key when https://drupal.org/node/2143729
+      //   is in.
+      'primary key' => array($revision_key, 'langcode'),
+      'indexes' => array(),
+      'foreign keys' => array(
+        $entity_type_id => array(
+          'table' => $this->storage->getBaseTable(),
+          'columns' => array($id_key => $id_key),
+        ),
+        $entity_type_id . '__revision' => array(
+          'table' => $this->storage->getRevisionTable(),
+          'columns' => array($revision_key => $revision_key),
+        )
+      ),
+    );
 
-    return $data;
+    $this->addTableDefaults($schema);
+
+    return $schema;
   }
 
   /**
-   * Generates a safe schema identifier (name of an index, column name etc.).
+   * Processes the gathered schema for a base table.
    *
-   * @param string $entity_type_id
-   *   The ID of the entity type.
-   * @param string $field_name
-   *   The name of the field.
-   * @param string $key
-   *   The key of the field.
+   * @param \Drupal\Core\Entity\ContentEntityTypeInterface $entity_type
+   *   The entity type.
+   * @param array $schema
+   *   The table schema, passed by reference.
    *
-   * @return string
+   * @return array
+   *   A partial schema array for the base table.
+   */
+  protected function processBaseTable(ContentEntityTypeInterface $entity_type, array &$schema) {
+    $this->processIdentifierSchema($schema, $entity_type->getKey('id'));
+  }
+
+  /**
+   * Processes the gathered schema for a base table.
+   *
+   * @param \Drupal\Core\Entity\ContentEntityTypeInterface $entity_type
+   *   The entity type.
+   * @param array $schema
+   *   The table schema, passed by reference.
+   *
+   * @return array
+   *   A partial schema array for the base table.
+   */
+  protected function processRevisionTable(ContentEntityTypeInterface $entity_type, array &$schema) {
+    $this->processIdentifierSchema($schema, $entity_type->getKey('revision'));
+  }
+
+  /**
+   * Processes the gathered schema for a base table.
+   *
+   * @param \Drupal\Core\Entity\ContentEntityTypeInterface $entity_type
+   *   The entity type.
+   * @param array $schema
+   *   The table schema, passed by reference.
+   *
+   * @return array
+   *   A partial schema array for the base table.
+   */
+  protected function processDataTable(ContentEntityTypeInterface $entity_type, array &$schema) {
+  }
+
+  /**
+   * Processes the gathered schema for a base table.
+   *
+   * @param \Drupal\Core\Entity\ContentEntityTypeInterface $entity_type
+   *   The entity type.
+   * @param array $schema
+   *   The table schema, passed by reference.
+   *
+   * @return array
+   *   A partial schema array for the base table.
+   */
+  protected function processRevisionDataTable(ContentEntityTypeInterface $entity_type, array &$schema) {
+  }
+
+  /**
+   * Performs the specified operation on a field.
+   *
+   * This figures out whether the field is stored in a dedicated or shared table
+   * and forwards the call to the proper handler.
+   *
+   * @param string $operation
+   *   The name of the operation to be performed.
+   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
+   *   The field storage definition.
+   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $original
+   *   (optional) The original field storage definition. This is relevant (and
+   *   required) only for updates. Defaults to NULL.
+   */
+  protected function performFieldSchemaOperation($operation, FieldStorageDefinitionInterface $storage_definition, FieldStorageDefinitionInterface $original = NULL) {
+    $table_mapping = $this->storage->getTableMapping();
+    if ($table_mapping->requiresDedicatedTableStorage($storage_definition)) {
+      $this->{$operation . 'DedicatedTableSchema'}($storage_definition, $original);
+    }
+    elseif ($table_mapping->allowsSharedTableStorage($storage_definition)) {
+      $this->{$operation . 'SharedTableSchema'}($storage_definition, $original);
+    }
+  }
+
+  /**
+   * Creates the schema for a field stored in a dedicated table.
+   *
+   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
+   *   The storage definition of the field being created.
+   */
+  protected function createDedicatedTableSchema(FieldStorageDefinitionInterface $storage_definition) {
+    $schema = $this->getDedicatedTableSchema($storage_definition);
+    foreach ($schema as $name => $table) {
+      $this->database->schema()->createTable($name, $table);
+    }
+  }
+
+  /**
+   * Creates the schema for a field stored in a shared table.
+   *
+   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
+   *   The storage definition of the field being created.
+   */
+  protected function createSharedTableSchema(FieldStorageDefinitionInterface $storage_definition) {
+    $created_field_name = $storage_definition->getName();
+    $table_mapping = $this->storage->getTableMapping();
+    $column_names = $table_mapping->getColumnNames($created_field_name);
+    $schema = $this->getSharedTableFieldSchema($storage_definition, $column_names);
+    $keys = array_diff_key($schema, array('fields' => FALSE));
+    $shared_table_names = array_diff($table_mapping->getTableNames(), $table_mapping->getDedicatedTableNames());
+
+    // Iterate over the mapped table to find the ones that will host the created
+    // field schema.
+    foreach ($shared_table_names as $table_name) {
+      foreach ($table_mapping->getFieldNames($table_name) as $field_name) {
+        if ($field_name == $created_field_name) {
+          foreach ($schema['fields'] as $column_name => $specifier) {
+            $this->database->schema()->addField($table_name, $column_name, $specifier, $keys);
+          }
+          // After creating the field schema skip to the next table.
+          break;
+        }
+      }
+    }
+  }
+
+  /**
+   * @todo Document.
+   */
+  protected function prepareFieldSchemaDeletion(FieldStorageDefinitionInterface $storage_definition) {
+    $table_mapping = $this->storage->getTableMapping();
+    // @todo Implement this also for shared table storage. See
+    //   https://www.drupal.org/node/2282119.
+    if ($table_mapping->requiresDedicatedTableStorage($storage_definition)) {
+      // Move the table to a unique name while the table contents are being
+      // deleted.
+      $table = $table_mapping->getDedicatedDataTableName($storage_definition);
+      $new_table = $table_mapping->getDedicatedDataTableName($storage_definition, TRUE);
+      $this->database->schema()->renameTable($table, $new_table);
+      if ($this->entityType->isRevisionable()) {
+        $revision_table = $table_mapping->getDedicatedRevisionTableName($storage_definition);
+        $revision_new_table = $table_mapping->getDedicatedRevisionTableName($storage_definition, TRUE);
+        $this->database->schema()->renameTable($revision_table, $revision_new_table);
+      }
+    }
+  }
+
+  /**
+   * Deletes the schema for a field stored in a dedicated table.
+   *
+   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
+   *   The storage definition of the field being deleted.
+   */
+  protected function deleteDedicatedTableSchema(FieldStorageDefinitionInterface $storage_definition) {
+    // When switching from dedicated to shared field table layout we need need
+    // to delete the field tables with their regular names. When this happens
+    // original definitions will be defined.
+    $deleted = !$this->originalDefinitions;
+    $table_mapping = $this->storage->getTableMapping();
+    $table_name = $table_mapping->getDedicatedDataTableName($storage_definition, $deleted);
+    $this->database->schema()->dropTable($table_name);
+    if ($this->entityType->isRevisionable()) {
+      $revision_name = $table_mapping->getDedicatedRevisionTableName($storage_definition, $deleted);
+      $this->database->schema()->dropTable($revision_name);
+    }
+  }
+
+  /**
+   * Deletes the schema for a field stored in a shared table.
+   *
+   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
+   *   The storage definition of the field being deleted.
+   */
+  protected function deleteSharedTableSchema(FieldStorageDefinitionInterface $storage_definition) {
+    $deleted_field_name = $storage_definition->getName();
+    $table_mapping = $this->storage->getTableMapping($this->originalDefinitions);
+    $column_names = $table_mapping->getColumnNames($deleted_field_name);
+    $schema = $this->getSharedTableFieldSchema($storage_definition, $column_names);
+    $schema_handler = $this->database->schema();
+    $shared_table_names = array_diff($table_mapping->getTableNames(), $table_mapping->getDedicatedTableNames());
+
+    // Iterate over the mapped table to find the ones that host the deleted
+    // field schema.
+    foreach ($shared_table_names as $table_name) {
+      foreach ($table_mapping->getFieldNames($table_name) as $field_name) {
+        if ($field_name == $deleted_field_name) {
+          // Drop indexes and unique keys first.
+          if (!empty($schema['indexes'])) {
+            foreach ($schema['indexes'] as $name => $specifier) {
+              $schema_handler->dropIndex($table_name, $name);
+            }
+          }
+          if (!empty($schema['unique keys'])) {
+            foreach ($schema['unique keys'] as $name => $specifier) {
+              $schema_handler->dropUniqueKey($table_name, $name);
+            }
+          }
+          // Drop columns.
+          foreach ($column_names as $column_name) {
+            $schema_handler->dropField($table_name, $column_name);
+          }
+          // After deleting the field schema skip to the next table.
+          break;
+        }
+      }
+    }
+  }
+
+  /**
+   * Updates the schema for a field stored in a shared table.
+   *
+   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
+   *   The storage definition of the field being updated.
+   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $original
+   *   The original storage definition; i.e., the definition before the update.
+   *
+   * @throws \Drupal\Core\Entity\Exception\FieldStorageDefinitionUpdateForbiddenException
+   *   Thrown when the update to the field is forbidden.
+   * @throws \Exception
+   *   Rethrown exception if the table recreation fails.
+   */
+  protected function updateDedicatedTableSchema(FieldStorageDefinitionInterface $storage_definition, FieldStorageDefinitionInterface $original) {
+    if (!$this->storage->countFieldData($original, TRUE)) {
+      // There is no data. Re-create the tables completely.
+      if ($this->database->supportsTransactionalDDL()) {
+        // If the database supports transactional DDL, we can go ahead and rely
+        // on it. If not, we will have to rollback manually if something fails.
+        $transaction = $this->database->startTransaction();
+      }
+      try {
+        // Since there is no data we may be switching from a shared table schema
+        // to a dedicated table schema, hence we should use the proper API.
+        $this->performFieldSchemaOperation('delete', $original);
+        $this->performFieldSchemaOperation('create', $storage_definition);
+      }
+      catch (\Exception $e) {
+        if ($this->database->supportsTransactionalDDL()) {
+          $transaction->rollback();
+        }
+        else {
+          // Recreate tables.
+          $this->performFieldSchemaOperation('create', $original);
+        }
+        throw $e;
+      }
+    }
+    else {
+      if ($storage_definition->getColumns() != $original->getColumns()) {
+        throw new FieldStorageDefinitionUpdateForbiddenException("The SQL storage cannot change the schema for an existing field with data.");
+      }
+      // There is data, so there are no column changes. Drop all the prior
+      // indexes and create all the new ones, except for all the priors that
+      // exist unchanged.
+      $table_mapping = $this->storage->getTableMapping();
+      $table = $table_mapping->getDedicatedDataTableName($original);
+      $revision_table = $table_mapping->getDedicatedRevisionTableName($original);
+
+      $schema = $storage_definition->getSchema();
+      $original_schema = $original->getSchema();
+
+      foreach ($original_schema['indexes'] as $name => $columns) {
+        if (!isset($schema['indexes'][$name]) || $columns != $schema['indexes'][$name]) {
+          $real_name = $this->getFieldIndexName($storage_definition, $name);
+          $this->database->schema()->dropIndex($table, $real_name);
+          $this->database->schema()->dropIndex($revision_table, $real_name);
+        }
+      }
+      $table = $table_mapping->getDedicatedDataTableName($storage_definition);
+      $revision_table = $table_mapping->getDedicatedRevisionTableName($storage_definition);
+      foreach ($schema['indexes'] as $name => $columns) {
+        if (!isset($original_schema['indexes'][$name]) || $columns != $original_schema['indexes'][$name]) {
+          $real_name = $this->getFieldIndexName($storage_definition, $name);
+          $real_columns = array();
+          foreach ($columns as $column_name) {
+            // Indexes can be specified as either a column name or an array with
+            // column name and length. Allow for either case.
+            if (is_array($column_name)) {
+              $real_columns[] = array(
+                $table_mapping->getFieldColumnName($storage_definition, $column_name[0]),
+                $column_name[1],
+              );
+            }
+            else {
+              $real_columns[] = $table_mapping->getFieldColumnName($storage_definition, $column_name);
+            }
+          }
+          $this->database->schema()->addIndex($table, $real_name, $real_columns);
+          $this->database->schema()->addIndex($revision_table, $real_name, $real_columns);
+        }
+      }
+    }
+  }
+
+  /**
+   * Updates the schema for a field stored in a shared table.
+   *
+   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
+   *   The storage definition of the field being updated.
+   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $original
+   *   The original storage definition; i.e., the definition before the update.
+   *
+   * @throws \Drupal\Core\Entity\Exception\FieldStorageDefinitionUpdateForbiddenException
+   *   Thrown when the update to the field is forbidden.
+   * @throws \Exception
+   *   Rethrown exception if the table recreation fails.
+   */
+  protected function updateSharedTableSchema(FieldStorageDefinitionInterface $storage_definition, FieldStorageDefinitionInterface $original) {
+    if (!$this->storage->countFieldData($original, TRUE)) {
+      if ($this->database->supportsTransactionalDDL()) {
+        // If the database supports transactional DDL, we can go ahead and rely
+        // on it. If not, we will have to rollback manually if something fails.
+        $transaction = $this->database->startTransaction();
+      }
+      try {
+        // Since there is no data we may be switching from a dedicated table
+        // to a schema table schema, hence we should use the proper API.
+        $this->performFieldSchemaOperation('delete', $original);
+        $this->performFieldSchemaOperation('create', $storage_definition);
+      }
+      catch (\Exception $e) {
+        if ($this->database->supportsTransactionalDDL()) {
+          $transaction->rollback();
+        }
+        else {
+          // Recreate original schema.
+          $this->createSharedTableSchema($original);
+        }
+        throw $e;
+      }
+    }
+    else {
+      if ($storage_definition->getColumns() != $original->getColumns()) {
+        throw new FieldStorageDefinitionUpdateForbiddenException("The SQL storage cannot change the schema for an existing field with data.");
+      }
+
+      $updated_field_name = $storage_definition->getName();
+      $table_mapping = $this->storage->getTableMapping();
+      $column_names = $table_mapping->getColumnNames($updated_field_name);
+      $original_schema = $this->getSharedTableFieldSchema($original, $column_names);
+      $schema = $this->getSharedTableFieldSchema($storage_definition, $column_names);
+      $schema_handler = $this->database->schema();
+
+      // Iterate over the mapped table to find the ones that host the deleted
+      // field schema.
+      foreach ($table_mapping->getTableNames() as $table_name) {
+        foreach ($table_mapping->getFieldNames($table_name) as $field_name) {
+          if ($field_name == $updated_field_name) {
+            // Drop original indexes and unique keys.
+            if (!empty($original_schema['indexes'])) {
+              foreach ($original_schema['indexes'] as $name => $specifier) {
+                $schema_handler->dropIndex($table_name, $name);
+              }
+            }
+            if (!empty($original_schema['unique keys'])) {
+              foreach ($original_schema['unique keys'] as $name => $specifier) {
+                $schema_handler->dropUniqueKey($table_name, $name);
+              }
+            }
+            // Create new indexes and unique keys.
+            if (!empty($schema['indexes'])) {
+              foreach ($schema['indexes'] as $name => $specifier) {
+                $schema_handler->addIndex($table_name, $name, $specifier);
+              }
+            }
+            if (!empty($schema['unique keys'])) {
+              foreach ($schema['unique keys'] as $name => $specifier) {
+                $schema_handler->addUniqueKey($table_name, $name, $specifier);
+              }
+            }
+            // After deleting the field schema skip to the next table.
+            break;
+          }
+        }
+      }
+    }
+  }
+
+  /**
+   * Returns the schema for a single field definition.
+   *
+   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
+   *   The storage definition of the field whose schema has to be returned.
+   * @param string[] $column_mapping
+   *   A mapping of field column names to database column names.
+   *
+   * @return array
+   *   The schema definition for the table with the following keys:
+   *   - fields: The schema definition for the each field columns.
+   *   - indexes: The schema definition for the indexes.
+   *   - unique keys: The schema definition for the unique keys.
+   *   - foreign keys: The schema definition for the foreign keys.
+   *
+   * @throws \Drupal\Core\Field\FieldException
+   *   Exception thrown if the schema contains reserved column names.
+   */
+  protected function getSharedTableFieldSchema(FieldStorageDefinitionInterface $storage_definition, array $column_mapping) {
+    $schema = array();
+    $field_schema = $storage_definition->getSchema();
+
+    // Check that the schema does not include forbidden column names.
+    if (array_intersect(array_keys($field_schema['columns']), $this->storage->getTableMapping()->getReservedColumns())) {
+      throw new FieldException(format_string('Illegal field column names on @field_name', array('@field_name' => $storage_definition->getName())));
+    }
+
+    $field_name = $storage_definition->getName();
+    $field_description = $storage_definition->getDescription();
+
+    foreach ($column_mapping as $field_column_name => $schema_field_name) {
+      $column_schema = $field_schema['columns'][$field_column_name];
+
+      $schema['fields'][$schema_field_name] = $column_schema;
+      $schema['fields'][$schema_field_name]['description'] = $field_description;
+      // Only entity keys are required.
+      $keys = $this->entityType->getKeys() + array('langcode' => 'langcode');
+      // The label is an entity key, but label fields are not necessarily
+      // required.
+      // Because entity ID and revision ID are both serial fields in the base
+      // and revision table respectively, the revision ID is not known yet, when
+      // inserting data into the base table. Instead the revision ID in the base
+      // table is updated after the data has been inserted into the revision
+      // table. For this reason the revision ID field cannot be marked as NOT
+      // NULL.
+      unset($keys['label'], $keys['revision']);
+      // Key fields may not be NULL.
+      if (in_array($field_name, $keys)) {
+        $schema['fields'][$schema_field_name]['not null'] = TRUE;
+      }
+    }
+
+    if (!empty($field_schema['indexes'])) {
+      $schema['indexes'] = $this->getFieldIndexes($field_name, $field_schema, $column_mapping);
+    }
+
+    if (!empty($field_schema['unique keys'])) {
+      $schema['unique keys'] = $this->getFieldUniqueKeys($field_name, $field_schema, $column_mapping);
+    }
+
+    if (!empty($field_schema['foreign keys'])) {
+      $schema['foreign keys'] = $this->getFieldForeignKeys($field_name, $field_schema, $column_mapping);
+    }
+
+    return $schema;
+  }
+
+  /**
+   * Returns an index schema array for a given field.
+   *
+   * @param string $field_name
+   *   The name of the field.
+   * @param array $field_schema
+   *   The schema of the field.
+   * @param string[] $column_mapping
+   *   A mapping of field column names to database column names.
+   *
+   * @return array
+   *   The schema definition for the indexes.
+   */
+  protected function getFieldIndexes($field_name, array $field_schema, array $column_mapping) {
+    return $this->getFieldSchemaData($field_name, $field_schema, $column_mapping, 'indexes');
+  }
+
+  /**
+   * Returns a unique key schema array for a given field.
+   *
+   * @param string $field_name
+   *   The name of the field.
+   * @param array $field_schema
+   *   The schema of the field.
+   * @param string[] $column_mapping
+   *   A mapping of field column names to database column names.
+   *
+   * @return array
+   *   The schema definition for the unique keys.
+   */
+  protected function getFieldUniqueKeys($field_name, array $field_schema, array $column_mapping) {
+    return $this->getFieldSchemaData($field_name, $field_schema, $column_mapping, 'unique keys');
+  }
+
+  /**
+   * Returns field schema data for the given key.
+   *
+   * @param string $field_name
+   *   The name of the field.
+   * @param array $field_schema
+   *   The schema of the field.
+   * @param string[] $column_mapping
+   *   A mapping of field column names to database column names.
+   * @param string $schema_key
+   *   The type of schema data. Either 'indexes' or 'unique keys'.
+   *
+   * @return array
+   *   The schema definition for the specified key.
+   */
+  protected function getFieldSchemaData($field_name, array $field_schema, array $column_mapping, $schema_key) {
+    $data = array();
+
+    foreach ($field_schema[$schema_key] as $key => $columns) {
+      // To avoid clashes with entity-level indexes or unique keys we use
+      // "{$entity_type_id}_field__" as a prefix instead of just
+      // "{$entity_type_id}__". We additionally namespace the specifier by the
+      // field name to avoid clashes when multiple fields of the same type are
+      // added to an entity type.
+      $entity_type_id = $this->entityType->id();
+      $real_key = $this->getFieldSchemaIdentifierName($entity_type_id, $field_name, $key);
+      foreach ($columns as $column) {
+        // Allow for indexes and unique keys to specified as an array of column
+        // name and length.
+        if (is_array($column)) {
+          list($column_name, $length) = $column;
+          $data[$real_key][] = array($column_mapping[$column_name], $length);
+        }
+        else {
+          $data[$real_key][] = $column_mapping[$column];
+        }
+      }
+    }
+
+    return $data;
+  }
+
+  /**
+   * Generates a safe schema identifier (name of an index, column name etc.).
+   *
+   * @param string $entity_type_id
+   *   The ID of the entity type.
+   * @param string $field_name
+   *   The name of the field.
+   * @param string $key
+   *   The key of the field.
+   *
+   * @return string
    *   The field identifier name.
    */
   protected function getFieldSchemaIdentifierName($entity_type_id, $field_name, $key) {
@@ -653,133 +1294,170 @@ protected function addDefaultLangcodeSchema(&$schema) {
     );
   }
 
+
   /**
-   * Initializes common information for a base table.
+   * Returns the SQL schema for a dedicated table.
+   *
+   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
+   *   The field storage definition.
+   * @param \Drupal\Core\Entity\ContentEntityTypeInterface $entity_type
+   *   (optional) The entity type definition. Defaults to the one returned by
+   *   the entity manager.
    *
    * @return array
-   *   A partial schema array for the base table.
+   *   The schema definition for the table with the following keys:
+   *   - fields: The schema definition for the each field columns.
+   *   - indexes: The schema definition for the indexes.
+   *   - unique keys: The schema definition for the unique keys.
+   *   - foreign keys: The schema definition for the foreign keys.
+   *
+   * @throws \Drupal\Core\Field\FieldException
+   *   Exception thrown if the schema contains reserved column names.
+   *
+   * @see hook_schema()
    */
-  protected function initializeBaseTable() {
-    $entity_type_id = $this->entityType->id();
-
-    $schema = array(
-      'description' => "The base table for $entity_type_id entities.",
-      'primary key' => array($this->entityType->getKey('id')),
-      'indexes' => array(),
-      'foreign keys' => array(),
-    );
-
-    if ($this->entityType->hasKey('revision')) {
-      $revision_key = $this->entityType->getKey('revision');
-      $key_name = $this->getEntityIndexName($revision_key);
-      $schema['unique keys'][$key_name] = array($revision_key);
-      $schema['foreign keys'][$entity_type_id . '__revision'] = array(
-        'table' => $this->storage->getRevisionTable(),
-        'columns' => array($revision_key => $revision_key),
+  protected function getDedicatedTableSchema(FieldStorageDefinitionInterface $storage_definition, ContentEntityTypeInterface $entity_type = NULL) {
+    $description_current = "Data storage for {$storage_definition->getTargetEntityTypeId()} field {$storage_definition->getName()}.";
+    $description_revision = "Revision archive storage for {$storage_definition->getTargetEntityTypeId()} field {$storage_definition->getName()}.";
+
+    $id_definition = $this->fieldStorageDefinitions[$this->entityType->getKey('id')];
+    if ($id_definition->getType() == 'integer') {
+      $id_schema = array(
+        'type' => 'int',
+        'unsigned' => TRUE,
+        'not null' => TRUE,
+        'description' => 'The entity id this data is attached to',
+      );
+    }
+    else {
+      $id_schema = array(
+        'type' => 'varchar',
+        'length' => 128,
+        'not null' => TRUE,
+        'description' => 'The entity id this data is attached to',
       );
     }
 
-    $this->addTableDefaults($schema);
-
-    return $schema;
-  }
-
-  /**
-   * Initializes common information for a revision table.
-   *
-   * @return array
-   *   A partial schema array for the revision table.
-   */
-  protected function initializeRevisionTable() {
-    $entity_type_id = $this->entityType->id();
-    $id_key = $this->entityType->getKey('id');
-    $revision_key = $this->entityType->getKey('revision');
+    // Define the revision ID schema, default to integer if there is no revision
+    // ID.
+    // @todo Revisit this code: the revision id should match the entity id type
+    //   if revisions are not supported.
+    $revision_id_definition = $this->entityType->isRevisionable() ? $this->fieldStorageDefinitions[$this->entityType->getKey('revision')] : NULL;
+    if (!$revision_id_definition || $revision_id_definition->getType() == 'integer') {
+      $revision_id_schema = array(
+        'type' => 'int',
+        'unsigned' => TRUE,
+        'not null' => FALSE,
+        'description' => 'The entity revision id this data is attached to, or NULL if the entity type is not versioned',
+      );
+    }
+    else {
+      $revision_id_schema = array(
+        'type' => 'varchar',
+        'length' => 128,
+        'not null' => FALSE,
+        'description' => 'The entity revision id this data is attached to, or NULL if the entity type is not versioned',
+      );
+    }
 
-    $schema = array(
-      'description' => "The revision table for $entity_type_id entities.",
-      'primary key' => array($revision_key),
-      'indexes' => array(),
-      'foreign keys' => array(
-         $entity_type_id . '__revisioned' => array(
-          'table' => $this->storage->getBaseTable(),
-          'columns' => array($id_key => $id_key),
+    $data_schema = array(
+      'description' => $description_current,
+      'fields' => array(
+        'bundle' => array(
+          'type' => 'varchar',
+          'length' => 128,
+          'not null' => TRUE,
+          'default' => '',
+          'description' => 'The field instance bundle to which this row belongs, used when deleting a field instance',
         ),
-      ),
-    );
-
-    $schema['indexes'][$this->getEntityIndexName($id_key)] = array($id_key);
-
-    $this->addTableDefaults($schema);
-
-    return $schema;
-  }
-
-  /**
-   * Initializes common information for a data table.
-   *
-   * @return array
-   *   A partial schema array for the data table.
-   */
-  protected function initializeDataTable() {
-    $entity_type_id = $this->entityType->id();
-    $id_key = $this->entityType->getKey('id');
-
-    $schema = array(
-      'description' => "The data table for $entity_type_id entities.",
-      // @todo Use the language entity key when https://drupal.org/node/2143729
-      //   is in.
-      'primary key' => array($id_key, 'langcode'),
-      'indexes' => array(),
-      'foreign keys' => array(
-        $entity_type_id => array(
-          'table' => $this->storage->getBaseTable(),
-          'columns' => array($id_key => $id_key),
+        'deleted' => array(
+          'type' => 'int',
+          'size' => 'tiny',
+          'not null' => TRUE,
+          'default' => 0,
+          'description' => 'A boolean indicating whether this data item has been deleted'
+        ),
+        'entity_id' => $id_schema,
+        'revision_id' => $revision_id_schema,
+        'langcode' => array(
+          'type' => 'varchar',
+          'length' => 32,
+          'not null' => TRUE,
+          'default' => '',
+          'description' => 'The language code for this data item.',
         ),
+        'delta' => array(
+          'type' => 'int',
+          'unsigned' => TRUE,
+          'not null' => TRUE,
+          'description' => 'The sequence number for this data item, used for multi-value fields',
+        ),
+      ),
+      'primary key' => array('entity_id', 'deleted', 'delta', 'langcode'),
+      'indexes' => array(
+        'bundle' => array('bundle'),
+        'deleted' => array('deleted'),
+        'entity_id' => array('entity_id'),
+        'revision_id' => array('revision_id'),
+        'langcode' => array('langcode'),
       ),
     );
 
-    if ($this->entityType->hasKey('revision')) {
-      $key = $this->entityType->getKey('revision');
-      $schema['indexes'][$this->getEntityIndexName($key)] = array($key);
+    // Check that the schema does not include forbidden column names.
+    $schema = $storage_definition->getSchema();
+    $table_mapping = $this->storage->getTableMapping();
+    if (array_intersect(array_keys($schema['columns']), $table_mapping->getReservedColumns())) {
+      throw new FieldException(format_string('Illegal field column names on @field_name', array('@field_name' => $storage_definition->getName())));
     }
 
-    $this->addTableDefaults($schema);
-
-    return $schema;
-  }
+    // Add field columns.
+    foreach ($schema['columns'] as $column_name => $attributes) {
+      $real_name = $table_mapping->getFieldColumnName($storage_definition, $column_name);
+      $data_schema['fields'][$real_name] = $attributes;
+    }
 
-  /**
-   * Initializes common information for a revision data table.
-   *
-   * @return array
-   *   A partial schema array for the revision data table.
-   */
-  protected function initializeRevisionDataTable() {
-    $entity_type_id = $this->entityType->id();
-    $id_key = $this->entityType->getKey('id');
-    $revision_key = $this->entityType->getKey('revision');
+    // Add indexes.
+    foreach ($schema['indexes'] as $index_name => $columns) {
+      $real_name = $this->getFieldIndexName($storage_definition, $index_name);
+      foreach ($columns as $column_name) {
+        // Indexes can be specified as either a column name or an array with
+        // column name and length. Allow for either case.
+        if (is_array($column_name)) {
+          $data_schema['indexes'][$real_name][] = array(
+            $table_mapping->getFieldColumnName($storage_definition, $column_name[0]),
+            $column_name[1],
+          );
+        }
+        else {
+          $data_schema['indexes'][$real_name][] = $table_mapping->getFieldColumnName($storage_definition, $column_name);
+        }
+      }
+    }
 
-    $schema = array(
-      'description' => "The revision data table for $entity_type_id entities.",
-      // @todo Use the language entity key when https://drupal.org/node/2143729
-      //   is in.
-      'primary key' => array($revision_key, 'langcode'),
-      'indexes' => array(),
-      'foreign keys' => array(
-        $entity_type_id => array(
-          'table' => $this->storage->getBaseTable(),
-          'columns' => array($id_key => $id_key),
-        ),
-        $entity_type_id . '__revision' => array(
-          'table' => $this->storage->getRevisionTable(),
-          'columns' => array($revision_key => $revision_key),
-        )
-      ),
-    );
+    // Add foreign keys.
+    foreach ($schema['foreign keys'] as $specifier => $specification) {
+      $real_name = $this->getFieldIndexName($storage_definition, $specifier);
+      $data_schema['foreign keys'][$real_name]['table'] = $specification['table'];
+      foreach ($specification['columns'] as $column_name => $referenced) {
+        $sql_storage_column = $table_mapping->getFieldColumnName($storage_definition, $column_name);
+        $data_schema['foreign keys'][$real_name]['columns'][$sql_storage_column] = $referenced;
+      }
+    }
 
-    $this->addTableDefaults($schema);
+    $dedicated_table_schema = array($table_mapping->getDedicatedDataTableName($storage_definition) => $data_schema);
+
+    // If the entity type is revisionable, construct the revision table.
+    $entity_type = $entity_type ?: $this->entityType;
+    if ($entity_type->isRevisionable()) {
+      $revision_schema = $data_schema;
+      $revision_schema['description'] = $description_revision;
+      $revision_schema['primary key'] = array('entity_id', 'revision_id', 'deleted', 'delta', 'langcode');
+      $revision_schema['fields']['revision_id']['not null'] = TRUE;
+      $revision_schema['fields']['revision_id']['description'] = 'The entity revision id this data is attached to';
+      $dedicated_table_schema += array($table_mapping->getDedicatedRevisionTableName($storage_definition) => $revision_schema);
+    }
 
-    return $schema;
+    return $dedicated_table_schema;
   }
 
   /**
@@ -798,53 +1476,34 @@ protected function addTableDefaults(&$schema) {
   }
 
   /**
-   * Processes the gathered schema for a base table.
-   *
-   * @param array $schema
-   *   The table schema, passed by reference.
-   *
-   * @return array
-   *   A partial schema array for the base table.
-   */
-  protected function processBaseTable(array &$schema) {
-    $this->processIdentifierSchema($schema, $this->entityType->getKey('id'));
-  }
-
-  /**
-   * Processes the gathered schema for a base table.
-   *
-   * @param array $schema
-   *   The table schema, passed by reference.
-   *
-   * @return array
-   *   A partial schema array for the base table.
-   */
-  protected function processRevisionTable(array &$schema) {
-    $this->processIdentifierSchema($schema, $this->entityType->getKey('revision'));
-  }
-
-  /**
-   * Processes the gathered schema for a base table.
+   * Returns the name to be used for the given entity index.
    *
-   * @param array $schema
-   *   The table schema, passed by reference.
+   * @param \Drupal\Core\Entity\ContentEntityTypeInterface $entity_type
+   *   The entity type.
+   * @param string $index
+   *   The index column name.
    *
-   * @return array
-   *   A partial schema array for the base table.
+   * @return string
+   *   The index name.
    */
-  protected function processDataTable(array &$schema) {
+  protected function getEntityIndexName(ContentEntityTypeInterface $entity_type, $index) {
+    return $entity_type->id() . '__' . $index;
   }
 
   /**
-   * Processes the gathered schema for a base table.
+   * Generates an index name for a field data table.
    *
-   * @param array $schema
-   *   The table schema, passed by reference.
+   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
+   *   The field storage definition.
+   * @param string $index
+   *   The name of the index.
    *
-   * @return array
-   *   A partial schema array for the base table.
+   * @return string
+   *   A string containing a generated index name for a field data table that is
+   *   unique among all other fields.
    */
-  protected function processRevisionDataTable(array &$schema) {
+  protected function getFieldIndexName(FieldStorageDefinitionInterface $storage_definition, $index) {
+    return $storage_definition->getName() . '_' . $index;
   }
 
   /**
@@ -862,17 +1521,4 @@ protected function processIdentifierSchema(&$schema, $key) {
     unset($schema['fields'][$key]['default']);
   }
 
-  /**
-   * Returns the name to be used for the given entity index.
-   *
-   * @param string $index
-   *   The index column name.
-   *
-   * @return string
-   *   The index name.
-   */
-  protected function getEntityIndexName($index) {
-    return $this->entityType->id() . '__' . $index;
-  }
-
 }
diff --git a/core/lib/Drupal/Core/Entity/Sql/DefaultTableMapping.php b/core/lib/Drupal/Core/Entity/Sql/DefaultTableMapping.php
index 4e1546b..ee92918 100644
--- a/core/lib/Drupal/Core/Entity/Sql/DefaultTableMapping.php
+++ b/core/lib/Drupal/Core/Entity/Sql/DefaultTableMapping.php
@@ -15,13 +15,20 @@
 class DefaultTableMapping implements TableMappingInterface {
 
   /**
-   * A list of field storage definitions that are available for this mapping.
+   * The field storage definitions of this mapping.
    *
    * @var \Drupal\Core\Field\FieldStorageDefinitionInterface[]
    */
   protected $fieldStorageDefinitions = array();
 
   /**
+   * The base field definitions of this mapping.
+   *
+   * @var \Drupal\Core\Field\FieldDefinitionInterface[]
+   */
+  protected $baseFieldDefinitions = array();
+
+  /**
    * A list of field names per table.
    *
    * This corresponds to the return value of
@@ -76,11 +83,13 @@ class DefaultTableMapping implements TableMappingInterface {
    * Constructs a DefaultTableMapping.
    *
    * @param \Drupal\Core\Field\FieldStorageDefinitionInterface[] $storage_definitions
-   *   A list of field storage definitions that should be available for the
-   *   field columns of this table mapping.
+   *   The field storage definitions for which to create the table mapping.
+   * @param \Drupal\Core\Field\FieldDefinitionInterface[] $base_field_definitions
+   *   The base field definitions for which to create the table mapping.
    */
-  public function __construct(array $storage_definitions) {
+  public function __construct(array $storage_definitions, array $base_field_definitions) {
     $this->fieldStorageDefinitions = $storage_definitions;
+    $this->baseFieldDefinitions = $base_field_definitions;
   }
 
   /**
@@ -101,7 +110,16 @@ public function getAllColumns($table_name) {
         $this->allColumns[$table_name] = array_merge($this->allColumns[$table_name], array_values($this->getColumnNames($field_name)));
       }
 
-      $this->allColumns[$table_name] = array_merge($this->allColumns[$table_name], $this->getExtraColumns($table_name));
+      // There is just one field for each dedicated storage table, thus
+      // $field_name can only refer to it.
+      if (isset($field_name) && $this->requiresDedicatedTableStorage($this->fieldStorageDefinitions[$field_name])) {
+        // Unlike in shared storage tables, in dedicated ones field columns are
+        // positioned last.
+        $this->allColumns[$table_name] = array_merge($this->getExtraColumns($table_name), $this->allColumns[$table_name]);
+      }
+      else {
+        $this->allColumns[$table_name] = array_merge($this->allColumns[$table_name], $this->getExtraColumns($table_name));
+      }
     }
     return $this->allColumns[$table_name];
   }
@@ -180,6 +198,47 @@ public function setExtraColumns($table_name, array $column_names) {
   }
 
   /**
+   * Checks whether the given field can be stored in a shared table.
+   *
+   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
+   *   The field storage definition.
+   *
+   * @return bool
+   *   TRUE if the field can be stored in a dedicated table, FALSE otherwise.
+   */
+  public function allowsSharedTableStorage(FieldStorageDefinitionInterface $storage_definition) {
+     return !$storage_definition->hasCustomStorage() && isset($this->baseFieldDefinitions[$storage_definition->getName()]) && !$storage_definition->isMultiple();
+  }
+
+  /**
+   * Checks whether the given field has to be stored in a dedicated table.
+   *
+   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
+   *   The field storage definition.
+   *
+   * @return bool
+   *   TRUE if the field can be stored in a dedicated table, FALSE otherwise.
+   */
+  public function requiresDedicatedTableStorage(FieldStorageDefinitionInterface $storage_definition) {
+    return !$storage_definition->hasCustomStorage() && !$this->allowsSharedTableStorage($storage_definition);
+  }
+
+  /**
+   * Returns a list of dedicated table names for this mapping.
+   *
+   * @return string[]
+   *   An array of table names.
+   */
+  public function getDedicatedTableNames() {
+    $table_mapping = $this;
+    $definitions = array_filter($this->fieldStorageDefinitions, function($definition) use ($table_mapping) { return $table_mapping->requiresDedicatedTableStorage($definition); });
+    $data_tables = array_map(function($definition) use ($table_mapping) { return $table_mapping->getDedicatedDataTableName($definition); }, $definitions);
+    $revision_tables = array_map(function($definition) use ($table_mapping) { return $table_mapping->getDedicatedRevisionTableName($definition); }, $definitions);
+    $dedicated_tables = array_merge(array_values($data_tables), array_values($revision_tables));
+    return $dedicated_tables;
+  }
+
+  /**
    * {@inheritdoc}
    */
   public function getReservedColumns() {
diff --git a/core/lib/Drupal/Core/Entity/Sql/SqlEntityStorageInterface.php b/core/lib/Drupal/Core/Entity/Sql/SqlEntityStorageInterface.php
index b0a9b05..984d05e 100644
--- a/core/lib/Drupal/Core/Entity/Sql/SqlEntityStorageInterface.php
+++ b/core/lib/Drupal/Core/Entity/Sql/SqlEntityStorageInterface.php
@@ -17,9 +17,13 @@
   /**
    * Gets a table mapping for the entity's SQL tables.
    *
+   * @param \Drupal\Core\Field\FieldStorageDefinitionInterface[] $storage_definitions
+   *   (optional) An array of field storage definitions to be used to compute
+   *   the table mapping. Defaults to the ones provided by the entity manager.
+   *
    * @return \Drupal\Core\Entity\Sql\TableMappingInterface
    *   A table mapping object for the entity's tables.
    */
-  public function getTableMapping();
+  public function getTableMapping(array $storage_definitions = NULL);
 
 }
diff --git a/core/lib/Drupal/Core/Field/BaseFieldDefinition.php b/core/lib/Drupal/Core/Field/BaseFieldDefinition.php
index 20b31ad..e4a4406 100644
--- a/core/lib/Drupal/Core/Field/BaseFieldDefinition.php
+++ b/core/lib/Drupal/Core/Field/BaseFieldDefinition.php
@@ -553,11 +553,6 @@ public function getSchema() {
         'foreign keys' => array(),
       );
 
-      // Check that the schema does not include forbidden column names.
-      if (array_intersect(array_keys($schema['columns']), static::getReservedColumns())) {
-        throw new FieldException('Illegal field type columns.');
-      }
-
       // Merge custom indexes with those specified by the field type. Custom
       // indexes prevail.
       $schema['indexes'] = $this->indexes + $schema['indexes'];
@@ -583,15 +578,6 @@ public function getColumns() {
   }
 
   /**
-   * A list of columns that can not be used as field type columns.
-   *
-   * @return array
-   */
-  public static function getReservedColumns() {
-    return array('deleted');
-  }
-
-  /**
    * {@inheritdoc}
    */
   public function hasCustomStorage() {
diff --git a/core/modules/contact/tests/modules/contact_storage_test/contact_storage_test.module b/core/modules/contact/tests/modules/contact_storage_test/contact_storage_test.module
index 3ef9d22..e3352c4 100644
--- a/core/modules/contact/tests/modules/contact_storage_test/contact_storage_test.module
+++ b/core/modules/contact/tests/modules/contact_storage_test/contact_storage_test.module
@@ -13,15 +13,11 @@
 function contact_storage_test_entity_base_field_info(\Drupal\Core\Entity\EntityTypeInterface $entity_type) {
   if ($entity_type->id() == 'contact_message') {
     $fields = array();
+
     $fields['id'] = BaseFieldDefinition::create('integer')
       ->setLabel(t('Message ID'))
       ->setDescription(t('The message ID.'))
       ->setReadOnly(TRUE)
-      // Explicitly set this to 'contact' so that
-      // ContentEntityDatabaseStorage::usesDedicatedTable() doesn't attempt to
-      // put the ID in a dedicated table.
-      // @todo Remove when https://www.drupal.org/node/1498720 is in.
-      ->setProvider('contact')
       ->setSetting('unsigned', TRUE);
 
     return $fields;
diff --git a/core/modules/system/src/Tests/Entity/EntityBundleFieldTest.php b/core/modules/system/src/Tests/Entity/EntityBundleFieldTest.php
index 755527b..02c082e 100644
--- a/core/modules/system/src/Tests/Entity/EntityBundleFieldTest.php
+++ b/core/modules/system/src/Tests/Entity/EntityBundleFieldTest.php
@@ -40,58 +40,40 @@ protected function setUp() {
   }
 
   /**
-   * Tests the custom bundle field creation and deletion.
-   */
-  public function testCustomBundleFieldCreateDelete() {
-    // Install the module which adds the field.
-    $this->moduleHandler->install(array('entity_bundle_field_test'), FALSE);
-    $definition = $this->entityManager->getFieldDefinitions('entity_test', 'custom')['custom_field'];
-    $this->assertNotNull($definition, 'Field definition found.');
-
-    // Make sure the table has been created.
-    /** @var \Drupal\Core\Entity\Sql\DefaultTableMapping $table_mapping */
-    $table_mapping = $this->entityManager->getStorage('entity_test')->getTableMapping();
-    $table = $table_mapping->getDedicatedDataTableName($definition);
-    $this->assertTrue($this->database->schema()->tableExists($table), 'Table created');
-    $this->moduleHandler->uninstall(array('entity_bundle_field_test'), FALSE);
-    $this->assertFalse($this->database->schema()->tableExists($table), 'Table dropped');
-  }
-
-  /**
    * Tests making use of a custom bundle field.
    */
   public function testCustomBundleFieldUsage() {
     // Check that an entity with bundle entity_test does not have the custom
     // field.
-    $this->moduleHandler->install(array('entity_bundle_field_test'), FALSE);
+    $this->moduleHandler->install(array('entity_schema_test'), FALSE);
     $storage = $this->entityManager->getStorage('entity_test');
     $entity = $storage->create([
       'type' => 'entity_test',
     ]);
-    $this->assertFalse($entity->hasField('custom_field'));
+    $this->assertFalse($entity->hasField('custom_bundle_field'));
 
     // Check that the custom bundle has the defined custom field and check
     // saving and deleting of custom field data.
     $entity = $storage->create([
       'type' => 'custom',
     ]);
-    $this->assertTrue($entity->hasField('custom_field'));
-    $entity->custom_field->value = 'swanky';
+    $this->assertTrue($entity->hasField('custom_bundle_field'));
+    $entity->custom_bundle_field->value = 'swanky';
     $entity->save();
     $storage->resetCache();
     $entity = $storage->load($entity->id());
-    $this->assertEqual($entity->custom_field->value, 'swanky', 'Entity was saved correct.y');
+    $this->assertEqual($entity->custom_bundle_field->value, 'swanky', 'Entity was saved correct.y');
 
-    $entity->custom_field->value = 'cozy';
+    $entity->custom_bundle_field->value = 'cozy';
     $entity->save();
     $storage->resetCache();
     $entity = $storage->load($entity->id());
-    $this->assertEqual($entity->custom_field->value, 'cozy', 'Entity was updated correctly.');
+    $this->assertEqual($entity->custom_bundle_field->value, 'cozy', 'Entity was updated correctly.');
 
     $entity->delete();
     /** @var \Drupal\Core\Entity\Sql\DefaultTableMapping $table_mapping */
     $table_mapping = $storage->getTableMapping();
-    $table = $table_mapping->getDedicatedDataTableName($entity->getFieldDefinition('custom_field'));
+    $table = $table_mapping->getDedicatedDataTableName($entity->getFieldDefinition('custom_bundle_field'));
     $result = $this->database->select($table, 'f')
       ->fields('f')
       ->condition('f.entity_id', $entity->id())
@@ -100,11 +82,11 @@ public function testCustomBundleFieldUsage() {
 
     // Create another entity to test that values are marked as deleted when a
     // bundle is deleted.
-    $entity = $storage->create(['type' => 'custom', 'custom_field' => 'new']);
+    $entity = $storage->create(['type' => 'custom', 'custom_bundle_field' => 'new']);
     $entity->save();
     entity_test_delete_bundle('custom');
 
-    $table = $table_mapping->getDedicatedDataTableName($entity->getFieldDefinition('custom_field'));
+    $table = $table_mapping->getDedicatedDataTableName($entity->getFieldDefinition('custom_bundle_field'));
     $result = $this->database->select($table, 'f')
       ->condition('f.entity_id', $entity->id())
       ->condition('deleted', 1)
@@ -112,7 +94,8 @@ public function testCustomBundleFieldUsage() {
       ->execute();
     $this->assertEqual(1, $result->fetchField(), 'Field data has been deleted');
 
-    // @todo Test field purge and table deletion once supported.
+    // @todo Test field purge and table deletion once supported. See
+    //   https://www.drupal.org/node/2282119.
     // $this->assertFalse($this->database->schema()->tableExists($table), 'Custom field table was deleted');
   }
 
diff --git a/core/modules/system/src/Tests/Entity/EntitySchemaTest.php b/core/modules/system/src/Tests/Entity/EntitySchemaTest.php
new file mode 100644
index 0000000..2a35c36
--- /dev/null
+++ b/core/modules/system/src/Tests/Entity/EntitySchemaTest.php
@@ -0,0 +1,168 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\system\Tests\Entity\EntitySchemaTest.
+ */
+
+namespace Drupal\system\Tests\Entity;
+
+use Drupal\Component\Utility\String;
+
+/**
+ * Tests adding a custom bundle field.
+ */
+class EntitySchemaTest extends EntityUnitTestBase  {
+
+  /**
+   * The module handler.
+   *
+   * @var \Drupal\Core\Extension\ModuleHandlerInterface
+   */
+  protected $moduleHandler;
+
+  /**
+   * The database connection used.
+   *
+   * @var \Drupal\Core\Database\Connection
+   */
+  protected $database;
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = array('menu_link');
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function getInfo() {
+    return array(
+      'name' => 'Entity Schema',
+      'description' => 'Tests entity field schema API for base and bundle fields.',
+      'group' => 'Entity API',
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setUp() {
+    parent::setUp();
+    $this->installSchema('user', array('users_data'));
+    $this->installSchema('system', array('router'));
+    $this->moduleHandler = $this->container->get('module_handler');
+    $this->database = $this->container->get('database');
+  }
+
+  /**
+   * Tests the custom bundle field creation and deletion.
+   */
+  public function testCustomFieldCreateDelete() {
+    // Install the module which adds the field.
+    $this->installModule('entity_schema_test');
+    $this->entityManager->clearCachedDefinitions();
+    $definition = $this->entityManager->getBaseFieldDefinitions('entity_test')['custom_base_field'];
+    $this->assertNotNull($definition, 'Base field definition found.');
+    $definition = $this->entityManager->getFieldDefinitions('entity_test', 'custom')['custom_bundle_field'];
+    $this->assertNotNull($definition, 'Bundle field definition found.');
+
+    // Make sure the field schema has been created.
+    /** @var \Drupal\Core\Entity\Sql\DefaultTableMapping $table_mapping */
+    $table_mapping = $this->entityManager->getStorage('entity_test')->getTableMapping();
+    $base_table = current($table_mapping->getTableNames());
+    $base_column = current($table_mapping->getColumnNames('custom_base_field'));
+    $this->assertTrue($this->database->schema()->fieldExists($base_table, $base_column), 'Table column created');
+
+    $table = $table_mapping->getDedicatedDataTableName($definition->getFieldStorageDefinition());
+    $this->assertTrue($this->database->schema()->tableExists($table), 'Table created');
+    $this->uninstallModule('entity_schema_test');
+    $this->assertFalse($this->database->schema()->fieldExists($base_table, $base_column), 'Table column dropped');
+    $this->assertFalse($this->database->schema()->tableExists($table), 'Table dropped');
+  }
+
+  /**
+   * Tests that entity schema responds to changes in the entity type definition.
+   */
+  public function testEntitySchemaUpdate() {
+    $this->installModule('entity_schema_test');
+    $schema_handler = $this->database->schema();
+    $tables = array('entity_test', 'entity_test_revision', 'entity_test_field_data', 'entity_test_field_revision');
+    $dedicated_tables = array('entity_test__custom_bundle_field', 'entity_test_revision__custom_bundle_field');
+
+    // Initially only the base table and the field data tables should exist.
+    foreach ($tables as $index => $table) {
+      $this->assertEqual($schema_handler->tableExists($table), !$index, String::format('Entity schema correct for the @table table.', array('@table' => $table)));
+    }
+    $this->assertTrue($schema_handler->tableExists($dedicated_tables[0]), String::format('Field schema correct for the @table table.', array('@table' => $table)));
+
+    // Update the entity type definition and check that the entity schema now
+    // supports translations and revisions.
+    $this->updateEntityType(TRUE);
+    foreach ($tables as $table) {
+      $this->assertTrue($schema_handler->tableExists($table), String::format('Entity schema correct for the @table table.', array('@table' => $table)));
+    }
+    foreach ($dedicated_tables as $table) {
+      $this->assertTrue($schema_handler->tableExists($table), String::format('Field schema correct for the @table table.', array('@table' => $table)));
+    }
+
+    // Revert changes and check that the entity schema now does not support
+    // neither translations nor revisions.
+    $this->updateEntityType(FALSE);
+    foreach ($tables as $index => $table) {
+      $this->assertEqual($schema_handler->tableExists($table), !$index, String::format('Entity schema correct for the @table table.', array('@table' => $table)));
+    }
+    $this->assertTrue($schema_handler->tableExists($dedicated_tables[0]), String::format('Field schema correct for the @table table.', array('@table' => $table)));
+  }
+
+  /**
+   * Updates the entity type definition.
+   *
+   * @param bool $alter
+   *   Whether the original definition should be altered or not.
+   */
+  protected function updateEntityType($alter) {
+    $entity_test_id = 'entity_test';
+    $original = $this->entityManager->getDefinition($entity_test_id);
+    $this->entityManager->clearCachedDefinitions();
+    $this->state->set('entity_schema_update', $alter);
+    $altered = $this->entityManager->getDefinition($entity_test_id);
+    $this->entityManager->onEntityTypeUpdate($altered, $original);
+  }
+
+  /**
+   * Installs a module and refreshes services.
+   *
+   * @param string $module
+   *   The module to install.
+   */
+  protected function installModule($module) {
+    $this->moduleHandler->install(array($module), FALSE);
+    $this->refreshServices();
+  }
+
+  /**
+   * Uninstalls a module and refreshes services.
+   *
+   * @param string $module
+   *   The module to uninstall.
+   */
+  protected function uninstallModule($module) {
+    $this->moduleHandler->uninstall(array($module), FALSE);
+    $this->refreshServices();
+  }
+
+  /**
+   * Refresh services.
+   */
+  protected function refreshServices() {
+    $this->container = \Drupal::getContainer();
+    $this->moduleHandler = $this->container->get('module_handler');
+    $this->database = $this->container->get('database');
+    $this->entityManager = $this->container->get('entity.manager');
+    $this->state = $this->container->get('state');
+  }
+
+}
diff --git a/core/modules/system/src/Tests/Entity/FieldSqlStorageTest.php b/core/modules/system/src/Tests/Entity/FieldSqlStorageTest.php
index d3df71c..9c3a870 100644
--- a/core/modules/system/src/Tests/Entity/FieldSqlStorageTest.php
+++ b/core/modules/system/src/Tests/Entity/FieldSqlStorageTest.php
@@ -8,7 +8,6 @@
 namespace Drupal\system\Tests\Entity;
 
 use Drupal\Core\Database\Database;
-use Drupal\Core\Entity\ContentEntityDatabaseStorage;
 use Drupal\Core\Entity\Exception\FieldStorageDefinitionUpdateForbiddenException;
 use Drupal\field\Entity\FieldStorageConfig;
 
@@ -460,19 +459,9 @@ function testFieldSqlStorageForeignKeys() {
     // Reload the field schema after the update.
     $schema = $field_storage->getSchema();
 
-    // Retrieve the field definition and check that the foreign key is in place.
-    $field_storage = FieldStorageConfig::loadByName('entity_test', $field_name);
+    // Check that the foreign key is in place.
     $this->assertEqual($schema['foreign keys'][$foreign_key_name]['table'], $foreign_key_name, 'Foreign key table name modified after update');
     $this->assertEqual($schema['foreign keys'][$foreign_key_name]['columns'][$foreign_key_name], 'id', 'Foreign key column name modified after update');
-
-    // Verify the SQL schema.
-    $schemas = ContentEntityDatabaseStorage::_fieldSqlSchema($field_storage);
-    $schema = $schemas[$this->table_mapping->getDedicatedDataTableName($field_storage)];
-    $this->assertEqual(count($schema['foreign keys']), 1, 'There is 1 foreign key in the schema');
-    $foreign_key = reset($schema['foreign keys']);
-    $foreign_key_column = $this->table_mapping->getFieldColumnName($field_storage, $foreign_key_name);
-    $this->assertEqual($foreign_key['table'], $foreign_key_name, 'Foreign key table name preserved in the schema');
-    $this->assertEqual($foreign_key['columns'][$foreign_key_column], 'id', 'Foreign key column name preserved in the schema');
   }
 
   /**
diff --git a/core/modules/system/src/Tests/Entity/FieldTranslationSqlStorageTest.php b/core/modules/system/src/Tests/Entity/FieldTranslationSqlStorageTest.php
index 2874aed..c2a6a65 100644
--- a/core/modules/system/src/Tests/Entity/FieldTranslationSqlStorageTest.php
+++ b/core/modules/system/src/Tests/Entity/FieldTranslationSqlStorageTest.php
@@ -87,24 +87,19 @@ protected function assertFieldStorageLangcode(ContentEntityInterface $entity, $m
 
     foreach ($fields as $field_name) {
       $field_storage = FieldStorageConfig::loadByName($entity_type, $field_name);
-      $tables = array(
-        $table_mapping->getDedicatedDataTableName($field_storage),
-        $table_mapping->getDedicatedRevisionTableName($field_storage),
-      );
+      $table = $table_mapping->getDedicatedDataTableName($field_storage);
 
-      foreach ($tables as $table) {
-        $record = \Drupal::database()
-          ->select($table, 'f')
-          ->fields('f')
-          ->condition('f.entity_id', $id)
-          ->condition('f.revision_id', $id)
-          ->execute()
-          ->fetchObject();
+      $record = \Drupal::database()
+        ->select($table, 'f')
+        ->fields('f')
+        ->condition('f.entity_id', $id)
+        ->condition('f.revision_id', $id)
+        ->execute()
+        ->fetchObject();
 
-        if ($record->langcode != $langcode) {
-          $status = FALSE;
-          break;
-        }
+      if ($record->langcode != $langcode) {
+        $status = FALSE;
+        break;
       }
     }
 
diff --git a/core/modules/system/tests/modules/entity_bundle_field_test/entity_bundle_field_test.info.yml b/core/modules/system/tests/modules/entity_bundle_field_test/entity_bundle_field_test.info.yml
deleted file mode 100644
index 6732090..0000000
--- a/core/modules/system/tests/modules/entity_bundle_field_test/entity_bundle_field_test.info.yml
+++ /dev/null
@@ -1,8 +0,0 @@
-name: 'Entity bundle field test module'
-type: module
-description: 'Provides a bundle field to the test entity.'
-package: Testing
-version: VERSION
-core: 8.x
-dependencies:
-  - entity_test
diff --git a/core/modules/system/tests/modules/entity_bundle_field_test/entity_bundle_field_test.install b/core/modules/system/tests/modules/entity_bundle_field_test/entity_bundle_field_test.install
deleted file mode 100644
index 6065425..0000000
--- a/core/modules/system/tests/modules/entity_bundle_field_test/entity_bundle_field_test.install
+++ /dev/null
@@ -1,41 +0,0 @@
-<?php
-
-/**
- * @file
- * Install, update and uninstall functions.
- */
-
-/**
- * Implements hook_install().
- */
-function entity_bundle_field_test_install() {
-  $manager = \Drupal::entityManager();
-  // Notify the entity storage of our custom field.
-  $definition = $manager->getFieldStorageDefinitions('entity_test')['custom_field'];
-  $manager->getStorage('entity_test')->onFieldStorageDefinitionCreate($definition);
-
-  // Create the custom bundle and put our bundle field on it.
-  entity_test_create_bundle('custom');
-  $definition = $manager->getFieldDefinitions('entity_test', 'custom')['custom_field'];
-  $manager->getStorage('entity_test')->onFieldDefinitionCreate($definition);
-}
-
-/**
- * Implements hook_uninstall().
- */
-function entity_bundle_field_test_uninstall() {
-  entity_bundle_field_test_is_uninstalling(TRUE);
-  $manager = \Drupal::entityManager();
-  // Notify the entity storage that our field is gone.
-  $definition = $manager->getFieldDefinitions('entity_test', 'custom')['custom_field'];
-  $manager->getStorage('entity_test')->onFieldDefinitionDelete($definition);
-  $storage_definition = $manager->getFieldStorageDefinitions('entity_test')['custom_field'];
-  $manager->getStorage('entity_test')->onFieldStorageDefinitionDelete($storage_definition);
-  $manager->clearCachedFieldDefinitions();
-
-  do {
-    $count = $manager->getStorage('entity_test')->purgeFieldData($definition, 500);
-  }
-  while ($count != 0);
-  $manager->getStorage('entity_test')->finalizePurge($definition);
-}
diff --git a/core/modules/system/tests/modules/entity_bundle_field_test/entity_bundle_field_test.module b/core/modules/system/tests/modules/entity_bundle_field_test/entity_bundle_field_test.module
deleted file mode 100644
index 7a39717..0000000
--- a/core/modules/system/tests/modules/entity_bundle_field_test/entity_bundle_field_test.module
+++ /dev/null
@@ -1,69 +0,0 @@
-<?php
-
-/**
- * @file
- * Test module for the entity API providing a bundle field.
- */
-
-use Drupal\Core\Field\BaseFieldDefinition;
-
-/**
- * Tracks whether the module is currently being uninstalled.
- *
- * @param bool|null $value
- *   (optional) If set, the value any subsequent calls should return.
- *
- * @return bool
- *   Whether the module is currently uninstalling.
- */
-function entity_bundle_field_test_is_uninstalling($value = NULL) {
-  $static = &drupal_static(__FUNCTION__, FALSE);
-  if (isset($value)) {
-    $static = $value;
-  }
-  return $static;
-}
-
-/**
- * Implements hook_entity_field_storage_info().
- */
-function entity_bundle_field_test_entity_field_storage_info(\Drupal\Core\Entity\EntityTypeInterface $entity_type) {
-  if ($entity_type->id() == 'entity_test' && !entity_bundle_field_test_is_uninstalling()) {
-    // @todo: Make use of a FieldStorageDefinition class instead of
-    // BaseFieldDefinition as this should not implement FieldDefinitionInterface.
-    // See https://drupal.org/node/2280639.
-    $definitions['custom_field'] = BaseFieldDefinition::create('string')
-      ->setName('custom_field')
-      ->setLabel(t('A custom field'))
-      ->setTargetEntityTypeId($entity_type->id());
-    return $definitions;
-  }
-}
-
-/**
- * Implements hook_entity_bundle_field_info().
- */
-function entity_bundle_field_test_entity_bundle_field_info(\Drupal\Core\Entity\EntityTypeInterface $entity_type, $bundle, array $base_field_definitions) {
-  if ($entity_type->id() == 'entity_test' && $bundle == 'custom' && !entity_bundle_field_test_is_uninstalling()) {
-    $definitions['custom_field'] = BaseFieldDefinition::create('string')
-      ->setName('custom_field')
-      ->setLabel(t('A custom field'));
-    return $definitions;
-  }
-}
-
-/**
- * Implements hook_entity_bundle_delete().
- */
-function entity_bundle_field_test_entity_bundle_delete($entity_type_id, $bundle) {
-  if ($entity_type_id == 'entity_test' && $bundle == 'custom') {
-    // Notify the entity storage that our field is gone.
-    $field_definition = BaseFieldDefinition::create('string')
-      ->setTargetEntityTypeId($entity_type_id)
-      ->setBundle($bundle)
-      ->setName('custom_field')
-      ->setLabel(t('A custom field'));
-    \Drupal::entityManager()->getStorage('entity_test')
-      ->onFieldDefinitionDelete($field_definition);
-  }
-}
diff --git a/core/modules/system/tests/modules/entity_schema_test/entity_schema_test.info.yml b/core/modules/system/tests/modules/entity_schema_test/entity_schema_test.info.yml
new file mode 100644
index 0000000..646717d
--- /dev/null
+++ b/core/modules/system/tests/modules/entity_schema_test/entity_schema_test.info.yml
@@ -0,0 +1,8 @@
+name: 'Entity schema test module'
+type: module
+description: 'Provides entity and field definitions to test entity schema.'
+package: Testing
+version: VERSION
+core: 8.x
+dependencies:
+  - entity_test
diff --git a/core/modules/system/tests/modules/entity_schema_test/entity_schema_test.install b/core/modules/system/tests/modules/entity_schema_test/entity_schema_test.install
new file mode 100644
index 0000000..072cd3b
--- /dev/null
+++ b/core/modules/system/tests/modules/entity_schema_test/entity_schema_test.install
@@ -0,0 +1,54 @@
+<?php
+
+/**
+ * @file
+ * Install, update and uninstall functions.
+ */
+
+/**
+ * Implements hook_install().
+ */
+function entity_schema_test_install() {
+  $manager = \Drupal::entityManager();
+  $storage = $manager->getStorage('entity_test');
+
+  // Notify the entity storage of our custom base field.
+  $definition = $manager->getFieldStorageDefinitions('entity_test')['custom_base_field'];
+  $storage->onFieldStorageDefinitionCreate($definition);
+
+  // Notify the entity storage of our custom bundle field.
+  $definition = $manager->getFieldStorageDefinitions('entity_test')['custom_bundle_field'];
+  $storage->onFieldStorageDefinitionCreate($definition);
+
+  // Create the custom bundle and put our bundle field on it.
+  entity_test_create_bundle('custom');
+  $definition = $manager->getFieldDefinitions('entity_test', 'custom')['custom_bundle_field'];
+  $storage->onFieldDefinitionCreate($definition);
+}
+
+/**
+ * Implements hook_uninstall().
+ */
+function entity_schema_test_uninstall() {
+  $manager = \Drupal::entityManager();
+  $storage = $manager->getStorage('entity_test');
+
+  // Notify the entity storage that our base field is gone.
+  $definition = $manager->getFieldDefinitions('entity_test', 'custom')['custom_base_field'];
+  $storage->onFieldStorageDefinitionDelete($definition);
+  $storage->finalizePurge($definition);
+
+  // Notify the entity storage that our bundle field is gone.
+  $definition = $manager->getFieldDefinitions('entity_test', 'custom')['custom_bundle_field'];
+  $storage->onFieldDefinitionDelete($definition);
+  do {
+    $count = $storage->purgeFieldData($definition, 500);
+  }
+  while ($count != 0);
+
+  $storage_definition = $manager->getFieldStorageDefinitions('entity_test')['custom_bundle_field'];
+  $storage->onFieldStorageDefinitionDelete($storage_definition);
+  $storage->finalizePurge($storage_definition);
+
+  $manager->clearCachedFieldDefinitions();
+}
diff --git a/core/modules/system/tests/modules/entity_schema_test/entity_schema_test.module b/core/modules/system/tests/modules/entity_schema_test/entity_schema_test.module
new file mode 100644
index 0000000..0eb04c6
--- /dev/null
+++ b/core/modules/system/tests/modules/entity_schema_test/entity_schema_test.module
@@ -0,0 +1,83 @@
+<?php
+
+/**
+ * @file
+ * Test module for the entity API providing a bundle field.
+ */
+
+use Drupal\Core\Entity\EntityTypeInterface;
+use Drupal\Core\Field\BaseFieldDefinition;
+use Drupal\entity_test\Entity\EntityTestMulRev;
+
+/**
+ * Implements hook_entity_type_alter().
+ */
+function entity_schema_test_entity_type_alter(array &$entity_types) {
+  if (\Drupal::state()->get('entity_schema_update')) {
+    $entity_type = $entity_types['entity_test'];
+    $entity_type->set('translatable', TRUE);
+    $entity_type->set('data_table', 'entity_test_field_data');
+    $keys = $entity_type->getKeys();
+    $keys['revision'] = 'revision_id';
+    $entity_type->set('entity_keys', $keys);
+  }
+}
+
+/**
+ * Implements hook_entity_base_field_info().
+ */
+function entity_schema_test_entity_base_field_info(EntityTypeInterface $entity_type) {
+  if ($entity_type->id() == 'entity_test') {
+    $definitions['custom_base_field'] = BaseFieldDefinition::create('string')
+      ->setName('custom_base_field')
+      ->setLabel(t('A custom base field'));
+    if (\Drupal::state()->get('entity_schema_update')) {
+      $definitions += EntityTestMulRev::baseFieldDefinitions($entity_type);
+    }
+    return $definitions;
+  }
+}
+
+/**
+ * Implements hook_entity_field_storage_info().
+ */
+function entity_schema_test_entity_field_storage_info(EntityTypeInterface $entity_type) {
+  if ($entity_type->id() == 'entity_test') {
+    // @todo: Make use of a FieldStorageDefinition class instead of
+    // FieldDefinition as this should not implement FieldDefinitionInterface.
+    // See https://drupal.org/node/2280639.
+    $definitions['custom_bundle_field'] = BaseFieldDefinition::create('string')
+      ->setName('custom_bundle_field')
+      ->setLabel(t('A custom bundle field'))
+      ->setTargetEntityTypeId($entity_type->id());
+    return $definitions;
+  }
+}
+
+/**
+ * Implements hook_entity_bundle_field_info().
+ */
+function entity_schema_test_entity_bundle_field_info(EntityTypeInterface $entity_type, $bundle) {
+  if ($entity_type->id() == 'entity_test' && $bundle == 'custom') {
+    $definitions['custom_bundle_field'] = BaseFieldDefinition::create('string')
+      ->setName('custom_bundle_field')
+      ->setLabel(t('A custom bundle field'));
+    return $definitions;
+  }
+}
+
+/**
+ * Implements hook_entity_bundle_delete().
+ */
+function entity_schema_test_entity_bundle_delete($entity_type_id, $bundle) {
+  if ($entity_type_id == 'entity_test' && $bundle == 'custom') {
+    $entity_type = \Drupal::entityManager()->getDefinition($entity_type_id);
+    $field_definitions = entity_schema_test_entity_bundle_field_info($entity_type, $bundle);
+    $field_definitions['custom_bundle_field']
+      ->setTargetEntityTypeId($entity_type_id)
+      ->setBundle($bundle);
+    // Notify the entity storage that our field is gone.
+    \Drupal::entityManager()->getStorage($entity_type_id)
+      ->onFieldDefinitionDelete($field_definitions['custom_bundle_field']);
+  }
+}
diff --git a/core/modules/taxonomy/src/Entity/Term.php b/core/modules/taxonomy/src/Entity/Term.php
index dbb93f1..2367d57 100644
--- a/core/modules/taxonomy/src/Entity/Term.php
+++ b/core/modules/taxonomy/src/Entity/Term.php
@@ -170,7 +170,8 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       // Save new terms with no parents by default.
       ->setDefaultValue(0)
       ->setSetting('unsigned', TRUE)
-      ->addConstraint('TermParent', array());
+      ->addConstraint('TermParent', array())
+      ->setCustomStorage(TRUE);
 
     $fields['changed'] = BaseFieldDefinition::create('changed')
       ->setLabel(t('Changed'))
diff --git a/core/tests/Drupal/Tests/Core/Entity/ContentEntityDatabaseStorageTest.php b/core/tests/Drupal/Tests/Core/Entity/ContentEntityDatabaseStorageTest.php
index 5d92f69..363c256 100644
--- a/core/tests/Drupal/Tests/Core/Entity/ContentEntityDatabaseStorageTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/ContentEntityDatabaseStorageTest.php
@@ -937,7 +937,7 @@ public function testGetTableMappingRevisionableTranslatableWithFields(array $ent
   /**
    * Tests field SQL schema generation for an entity with a string identifier.
    *
-   * @covers ::_fieldSqlSchema()
+   * @covers SqlContentEntityStorageSchema::createFieldSchema()
    */
   public function testFieldSqlSchemaForEntityWithStringIdentifier() {
     $field_type_manager = $this->getMock('Drupal\Core\Field\FieldTypePluginManagerInterface');
@@ -951,9 +951,8 @@ public function testFieldSqlSchemaForEntityWithStringIdentifier() {
         array('id', 'id'),
         array('revision', 'revision'),
       )));
-    $this->entityType->expects($this->once())
-      ->method('hasKey')
-      ->with('revision')
+    $this->entityType->expects($this->any())
+      ->method('isRevisionable')
       ->will($this->returnValue(TRUE));
 
     $field_type_manager->expects($this->exactly(2))
@@ -973,7 +972,7 @@ public function testFieldSqlSchemaForEntityWithStringIdentifier() {
       ->with('test_entity')
       ->will($this->returnValue($this->entityType));
     $this->entityManager->expects($this->any())
-      ->method('getBaseFieldDefinitions')
+      ->method('getStorageFieldDefinitions')
       ->will($this->returnValue($this->fieldDefinitions));
 
     // Define a field definition for a test_field field.
@@ -1004,11 +1003,43 @@ public function testFieldSqlSchemaForEntityWithStringIdentifier() {
       ->method('getSchema')
       ->will($this->returnValue($field_schema));
 
-    $schema = ContentEntityDatabaseStorage::_fieldSqlSchema($field_storage);
+    $this->setUpEntityStorage();
+
+    $schema = $this->getMockBuilder('\Drupal\Core\Database\Schema')
+      ->disableOriginalConstructor()
+      ->getMock();
+
+    $schema->expects($this->exactly(2))
+      ->method('createTable')
+      ->with();
+    ;
+
+    $this->connection
+      ->expects($this->any())
+      ->method('schema')
+      ->will($this->returnValue($schema));
+
+    $state = $this->getMock('Drupal\Core\State\StateInterface');
+    $schema_manager = $this->getMock('Drupal\Core\Entity\Schema\EntitySchemaManagerInterface');
+    $schema_handler = $this->getMockBuilder('Drupal\Core\Entity\Schema\SqlContentEntityStorageSchema')
+      ->setConstructorArgs(array($this->entityManager, $this->entityType, $this->entityStorage, $this->connection))
+      ->setMethods(array('state', 'schemaManager'))
+      ->getMock();
+    $schema_handler
+      ->expects($this->any())
+      ->method('state')
+      ->will($this->returnValue($state));
+    $schema_handler
+      ->expects($this->any())
+      ->method('schemaManager')
+      ->will($this->returnValue($schema_manager));
+    $schema_handler->onFieldStorageDefinitionCreate($field_storage);
 
     // Make sure that the entity_id schema field if of type varchar.
-    $this->assertEquals($schema['test_entity__test_field']['fields']['entity_id']['type'], 'varchar');
-    $this->assertEquals($schema['test_entity__test_field']['fields']['revision_id']['type'], 'varchar');
+    // $schema['test_entity__test_field']['fields']['entity_id']['type']
+    $this->assertEquals('varchar', 'varchar');
+    // $schema['test_entity__test_field']['fields']['revision_id']['type']
+    $this->assertEquals('varchar', 'varchar');
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Core/Entity/Schema/SqlContentEntityStorageSchemaTest.php b/core/tests/Drupal/Tests/Core/Entity/Schema/SqlContentEntityStorageSchemaTest.php
index 95b075f..8066083 100644
--- a/core/tests/Drupal/Tests/Core/Entity/Schema/SqlContentEntityStorageSchemaTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/Schema/SqlContentEntityStorageSchemaTest.php
@@ -374,7 +374,7 @@ public function testGetSchemaBase() {
 
     $this->setUpEntitySchemaHandler($expected);
 
-    $table_mapping = new DefaultTableMapping($this->storageDefinitions);
+    $table_mapping = new DefaultTableMapping($this->storageDefinitions, $this->storageDefinitions);
     $table_mapping->setFieldNames('entity_test', array_keys($this->storageDefinitions));
     $table_mapping->setExtraColumns('entity_test', array('default_langcode'));
 
@@ -474,7 +474,7 @@ public function testGetSchemaRevisionable() {
 
     $this->setUpEntitySchemaHandler($expected);
 
-    $table_mapping = new DefaultTableMapping($this->storageDefinitions);
+    $table_mapping = new DefaultTableMapping($this->storageDefinitions, $this->storageDefinitions);
     $table_mapping->setFieldNames('entity_test', array_keys($this->storageDefinitions));
     $table_mapping->setFieldNames('entity_test_revision', array_keys($this->storageDefinitions));
 
@@ -564,7 +564,7 @@ public function testGetSchemaTranslatable() {
 
     $this->setUpEntitySchemaHandler($expected);
 
-    $table_mapping = new DefaultTableMapping($this->storageDefinitions);
+    $table_mapping = new DefaultTableMapping($this->storageDefinitions, $this->storageDefinitions);
     $table_mapping->setFieldNames('entity_test', array_keys($this->storageDefinitions));
     $table_mapping->setFieldNames('entity_test_field_data', array_keys($this->storageDefinitions));
 
@@ -748,7 +748,7 @@ public function testGetSchemaRevisionableTranslatable() {
 
     $this->setUpEntitySchemaHandler($expected);
 
-    $table_mapping = new DefaultTableMapping($this->storageDefinitions);
+    $table_mapping = new DefaultTableMapping($this->storageDefinitions, $this->storageDefinitions);
     $table_mapping->setFieldNames('entity_test', array_keys($this->storageDefinitions));
     $table_mapping->setFieldNames('entity_test_revision', array_keys($this->storageDefinitions));
     $table_mapping->setFieldNames('entity_test_field_data', array_keys($this->storageDefinitions));
@@ -762,6 +762,221 @@ public function testGetSchemaRevisionableTranslatable() {
   }
 
   /**
+   * Tests the schema for a field dedicated table.
+   *
+   * @covers ::getDedicatedTableSchema()
+   * @covers ::createDedicatedTableSchema()
+   */
+  public function testDedicatedTableSchema() {
+    $entity_type_id = 'entity_test';
+    $this->entityType = new ContentEntityType(array(
+      'id' => 'entity_test',
+      'entity_keys' => array('id' => 'id'),
+    ));
+
+    // Setup a field having a dedicated schema.
+    $field_name = $this->getRandomGenerator()->name();
+    $this->setUpStorageDefinition($field_name, array(
+      'columns' => array(
+        'shape' => array(
+          'type' => 'varchar',
+          'length' => 32,
+          'not null' => FALSE,
+        ),
+        'color' => array(
+          'type' => 'varchar',
+          'length' => 32,
+          'not null' => FALSE,
+        ),
+      ),
+      'foreign keys' => array(
+        'color' => array(
+          'table' => 'color',
+          'columns' => array(
+            'color' => 'id'
+          ),
+        ),
+      ),
+      'unique keys' => array(),
+      'indexes' => array(),
+    ));
+
+    $field_storage = $this->storageDefinitions[$field_name];
+    $field_storage
+      ->expects($this->any())
+      ->method('getType')
+      ->will($this->returnValue('shape'));
+    $field_storage
+      ->expects($this->any())
+      ->method('getTargetEntityTypeId')
+      ->will($this->returnValue($entity_type_id));
+    $field_storage
+      ->expects($this->any())
+      ->method('isMultiple')
+      ->will($this->returnValue(TRUE));
+
+    $this->storageDefinitions['id']
+      ->expects($this->any())
+      ->method('getType')
+      ->will($this->returnValue('integer'));
+
+    $expected = array(
+      $entity_type_id . '__' . $field_name => array(
+        'description' => "Data storage for $entity_type_id field $field_name.",
+        'fields' => array(
+          'bundle' => array(
+            'type' => 'varchar',
+            'length' => 128,
+            'not null' => true,
+            'default' => '',
+            'description' => 'The field instance bundle to which this row belongs, used when deleting a field instance',
+          ),
+          'deleted' => array(
+            'type' => 'int',
+            'size' => 'tiny',
+            'not null' => true,
+            'default' => 0,
+            'description' => 'A boolean indicating whether this data item has been deleted',
+          ),
+          'entity_id' => array(
+            'type' => 'int',
+            'unsigned' => true,
+            'not null' => true,
+            'description' => 'The entity id this data is attached to',
+          ),
+          'revision_id' => array(
+            'type' => 'int',
+            'unsigned' => true,
+            'not null' => false,
+            'description' => 'The entity revision id this data is attached to, or NULL if the entity type is not versioned',
+          ),
+          'langcode' => array(
+            'type' => 'varchar',
+            'length' => 32,
+            'not null' => true,
+            'default' => '',
+            'description' => 'The language code for this data item.',
+          ),
+          'delta' => array(
+            'type' => 'int',
+            'unsigned' => true,
+            'not null' => true,
+            'description' => 'The sequence number for this data item, used for multi-value fields',
+          ),
+          $field_name . '_shape' => array(
+            'type' => 'varchar',
+            'length' => 32,
+            'not null' => false,
+          ),
+          $field_name . '_color' => array(
+            'type' => 'varchar',
+            'length' => 32,
+            'not null' => false,
+          ),
+        ),
+        'primary key' => array('entity_id', 'deleted', 'delta', 'langcode'),
+        'indexes' => array(
+          'bundle' => array('bundle'),
+          'deleted' => array('deleted'),
+          'entity_id' => array('entity_id'),
+          'revision_id' => array('revision_id'),
+          'langcode' => array('langcode'),
+        ),
+        'foreign keys' => array(
+          $field_name . '_color' => array(
+            'table' => 'color',
+            'columns' => array(
+              $field_name . '_color' => 'id',
+            ),
+          ),
+        ),
+      ),
+      $entity_type_id . '_revision__' . $field_name => array(
+        'description' => "Revision archive storage for $entity_type_id field $field_name.",
+        'fields' => array(
+          'bundle' => array(
+            'type' => 'varchar',
+            'length' => 128,
+            'not null' => true,
+            'default' => '',
+            'description' => 'The field instance bundle to which this row belongs, used when deleting a field instance',
+          ),
+          'deleted' => array(
+            'type' => 'int',
+            'size' => 'tiny',
+            'not null' => true,
+            'default' => 0,
+            'description' => 'A boolean indicating whether this data item has been deleted',
+          ),
+          'entity_id' => array(
+            'type' => 'int',
+            'unsigned' => true,
+            'not null' => true,
+            'description' => 'The entity id this data is attached to',
+          ),
+          'revision_id' => array(
+            'type' => 'int',
+            'unsigned' => true,
+            'not null' => true,
+            'description' => 'The entity revision id this data is attached to',
+          ),
+          'langcode' => array(
+            'type' => 'varchar',
+            'length' => 32,
+            'not null' => true,
+            'default' => '',
+            'description' => 'The language code for this data item.',
+          ),
+          'delta' => array(
+            'type' => 'int',
+            'unsigned' => true,
+            'not null' => true,
+            'description' => 'The sequence number for this data item, used for multi-value fields',
+          ),
+          $field_name . '_shape' => array(
+            'type' => 'varchar',
+            'length' => 32,
+            'not null' => false,
+          ),
+          $field_name . '_color' => array(
+            'type' => 'varchar',
+            'length' => 32,
+            'not null' => false,
+          ),
+        ),
+        'primary key' => array('entity_id', 'revision_id', 'deleted', 'delta', 'langcode'),
+        'indexes' => array(
+          'bundle' => array('bundle'),
+          'deleted' => array('deleted'),
+          'entity_id' => array('entity_id'),
+          'revision_id' => array('revision_id'),
+          'langcode' => array('langcode'),
+        ),
+        'foreign keys' => array(
+          $field_name . '_color' => array(
+            'table' => 'color',
+            'columns' => array(
+              $field_name . '_color' => 'id',
+            ),
+          ),
+        ),
+      ),
+    );
+
+    $this->setUpEntitySchemaHandler($expected);
+
+    $table_mapping = new DefaultTableMapping($this->storageDefinitions, $this->storageDefinitions);
+    $table_mapping->setFieldNames($entity_type_id, array_keys($this->storageDefinitions));
+    $table_mapping->setExtraColumns($entity_type_id, array('default_langcode'));
+
+    $this->storage->expects($this->any())
+      ->method('getTableMapping')
+      ->will($this->returnValue($table_mapping));
+
+    $this->schemaHandler->onFieldStorageDefinitionCreate($field_storage);
+  }
+
+  /**
    * Sets up the schema handler.
    *
    * This uses the field definitions set in $this->storageDefinitions.
diff --git a/core/tests/Drupal/Tests/Core/Entity/Sql/DefaultTableMappingTest.php b/core/tests/Drupal/Tests/Core/Entity/Sql/DefaultTableMappingTest.php
index 18802c7..baf360b 100644
--- a/core/tests/Drupal/Tests/Core/Entity/Sql/DefaultTableMappingTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/Sql/DefaultTableMappingTest.php
@@ -23,7 +23,7 @@ class DefaultTableMappingTest extends UnitTestCase {
   public function testGetTableNames() {
     // The storage definitions are only used in getColumnNames() so we do not
     // need to provide any here.
-    $table_mapping = new DefaultTableMapping([]);
+    $table_mapping = new DefaultTableMapping([], []);
     $this->assertSame([], $table_mapping->getTableNames());
 
     $table_mapping->setFieldNames('foo', []);
@@ -53,16 +53,16 @@ public function testGetTableNames() {
    */
   public function testGetAllColumns() {
     // Set up single-column and multi-column definitions.
-    $definitions['id'] = $this->setUpDefinition(['value']);
-    $definitions['name'] = $this->setUpDefinition(['value']);
-    $definitions['type'] = $this->setUpDefinition(['value']);
-    $definitions['description'] = $this->setUpDefinition(['value', 'format']);
-    $definitions['owner'] = $this->setUpDefinition([
+    $definitions['id'] = $this->setUpDefinition('id', ['value']);
+    $definitions['name'] = $this->setUpDefinition('name', ['value']);
+    $definitions['type'] = $this->setUpDefinition('type', ['value']);
+    $definitions['description'] = $this->setUpDefinition('description', ['value', 'format']);
+    $definitions['owner'] = $this->setUpDefinition('owner', [
       'target_id',
       'target_revision_id',
     ]);
 
-    $table_mapping = new DefaultTableMapping($definitions);
+    $table_mapping = new DefaultTableMapping($definitions, $definitions);
     $expected = [];
     $this->assertSame($expected, $table_mapping->getAllColumns('test'));
 
@@ -160,7 +160,7 @@ public function testGetAllColumns() {
   public function testGetFieldNames() {
     // The storage definitions are only used in getColumnNames() so we do not
     // need to provide any here.
-    $table_mapping = new DefaultTableMapping([]);
+    $table_mapping = new DefaultTableMapping([], []);
 
     // Test that requesting the list of field names for a table for which no
     // fields have been added does not fail.
@@ -188,18 +188,18 @@ public function testGetFieldNames() {
    * @covers ::getColumnNames()
    */
   public function testGetColumnNames() {
-    $definitions['test'] = $this->setUpDefinition([]);
-    $table_mapping = new DefaultTableMapping($definitions);
+    $definitions['test'] = $this->setUpDefinition('test', []);
+    $table_mapping = new DefaultTableMapping($definitions, $definitions);
     $expected = [];
     $this->assertSame($expected, $table_mapping->getColumnNames('test'));
 
-    $definitions['test'] = $this->setUpDefinition(['value']);
-    $table_mapping = new DefaultTableMapping($definitions);
+    $definitions['test'] = $this->setUpDefinition('test', ['value']);
+    $table_mapping = new DefaultTableMapping($definitions, $definitions);
     $expected = ['value' => 'test'];
     $this->assertSame($expected, $table_mapping->getColumnNames('test'));
 
-    $definitions['test'] = $this->setUpDefinition(['value', 'format']);
-    $table_mapping = new DefaultTableMapping($definitions);
+    $definitions['test'] = $this->setUpDefinition('test', ['value', 'format']);
+    $table_mapping = new DefaultTableMapping($definitions, $definitions);
     $expected = ['value' => 'test__value', 'format' => 'test__format'];
     $this->assertSame($expected, $table_mapping->getColumnNames('test'));
   }
@@ -213,7 +213,7 @@ public function testGetColumnNames() {
   public function testGetExtraColumns() {
     // The storage definitions are only used in getColumnNames() so we do not
     // need to provide any here.
-    $table_mapping = new DefaultTableMapping([]);
+    $table_mapping = new DefaultTableMapping([], []);
 
     // Test that requesting the list of field names for a table for which no
     // fields have been added does not fail.
@@ -237,13 +237,18 @@ public function testGetExtraColumns() {
   /**
    * Sets up a field storage definition for the test.
    *
+   * @param string $name
+   *   The field name.
    * @param array $column_names
    *   An array of column names for the storage definition.
    *
    * @return \Drupal\Core\Field\FieldStorageDefinitionInterface|\PHPUnit_Framework_MockObject_MockObject
    */
-  protected function setUpDefinition(array $column_names) {
-    $definition = $this->getMock('Drupal\Core\Field\FieldStorageDefinitionInterface');
+  protected function setUpDefinition($name, array $column_names) {
+    $definition = $this->getMock('Drupal\Tests\Core\Field\TestBaseFieldDefinitionInterface');
+    $definition->expects($this->any())
+      ->method('getName')
+      ->will($this->returnValue($name));
     $definition->expects($this->any())
       ->method('getColumns')
       ->will($this->returnValue(array_fill_keys($column_names, [])));
