diff --git a/core/lib/Drupal/Core/Field/FieldDefinition.php b/core/lib/Drupal/Core/Field/FieldDefinition.php
index 67a9cc3..9e88c57 100644
--- a/core/lib/Drupal/Core/Field/FieldDefinition.php
+++ b/core/lib/Drupal/Core/Field/FieldDefinition.php
@@ -339,7 +339,7 @@ public function offsetSet($offset, $value) {
   public function getSchema() {
     if (!isset($this->schema)) {
       // Get the schema from the field item class.
-      $definition = \Drupal::service('plugin.manager.field.field_type')->getDefinition($this->type);
+      $definition = \Drupal::service('plugin.manager.field.field_type')->getDefinition($this->getFieldType());
       $class = $definition['class'];
       $schema = $class::schema($this);
       // Fill in default values for optional entries.
@@ -374,4 +374,13 @@ public function getColumns() {
     return $schema['columns'];
   }
 
+  /**
+   * A list of columns that can not be used as field type columns.
+   *
+   * @return array
+   */
+  public static function getReservedColumns() {
+    return array('deleted');
+  }
+
 }
diff --git a/core/lib/Drupal/Core/Field/FieldItemBase.php b/core/lib/Drupal/Core/Field/FieldItemBase.php
index 857c056..4645936 100644
--- a/core/lib/Drupal/Core/Field/FieldItemBase.php
+++ b/core/lib/Drupal/Core/Field/FieldItemBase.php
@@ -39,16 +39,6 @@ public function __construct($definition, $name = NULL, TypedDataInterface $paren
   /**
    * {@inheritdoc}
    */
-  public static function schema(FieldDefinitionInterface $field_definition) {
-    // @todo Remove when all field types will declare their schema.
-    return array(
-      'columns' => array(),
-    );
-  }
-
-  /**
-   * {@inheritdoc}
-   */
   public function getEntity() {
     return $this->getParent()->getEntity();
   }
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/BooleanItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/BooleanItem.php
index fe7ba96..caf1d24 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/BooleanItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/BooleanItem.php
@@ -7,6 +7,7 @@
 
 namespace Drupal\Core\Field\Plugin\Field\FieldType;
 
+use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldItemBase;
 
 /**
@@ -43,4 +44,21 @@ public function getPropertyDefinitions() {
     }
     return static::$propertyDefinitions;
   }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function schema(FieldDefinitionInterface $field_definition) {
+    return array(
+      'columns' => array(
+        'value' => array(
+          'type' => 'int',
+          'size' => 'tiny',
+          'not null' => TRUE,
+          'default' => 0,
+        ),
+      ),
+    );
+  }
+
 }
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/DateItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/DateItem.php
index 59984c8..8c5a82c 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/DateItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/DateItem.php
@@ -7,6 +7,7 @@
 
 namespace Drupal\Core\Field\Plugin\Field\FieldType;
 
+use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldItemBase;
 
 /**
@@ -43,4 +44,20 @@ public function getPropertyDefinitions() {
     }
     return static::$propertyDefinitions;
   }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function schema(FieldDefinitionInterface $field_definition) {
+    return array(
+      'columns' => array(
+        'value' => array(
+          'type' => 'int',
+          'not null' => TRUE,
+          'default' => 0,
+        ),
+      ),
+    );
+  }
+
 }
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/EmailItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/EmailItem.php
index ce0817c..df510bd 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/EmailItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/EmailItem.php
@@ -7,6 +7,7 @@
 
 namespace Drupal\Core\Field\Plugin\Field\FieldType;
 
+use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldItemBase;
 
 /**
@@ -22,6 +23,18 @@
 class EmailItem extends FieldItemBase {
 
   /**
+   * Defines the max length for an email address
+   *
+   * The maximum length of an e-mail address is 254 characters. RFC 3696
+   * specifies a total length of 320 characters, but mentions that
+   * addresses longer than 256 characters are not normally useful. Erratum
+   * 1690 was then released which corrected this value to 254 characters.
+   * @see http://tools.ietf.org/html/rfc3696#section-3
+   * @see http://www.rfc-editor.org/errata_search.php?rfc=3696&eid=1690
+   */
+  const EMAIL_MAX_LENGTH = 254;
+
+  /**
    * Definitions of the contained properties.
    *
    * @see EmailItem::getPropertyDefinitions()
@@ -44,6 +57,39 @@ public function getPropertyDefinitions() {
     return static::$propertyDefinitions;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public static function schema(FieldDefinitionInterface $field_definition) {
+    return array(
+      'columns' => array(
+        'value' => array(
+          'type' => 'varchar',
+          'length' => static::EMAIL_MAX_LENGTH,
+          'not null' => FALSE,
+        ),
+      ),
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getConstraints() {
+    $constraint_manager = \Drupal::typedData()->getValidationConstraintManager();
+    $constraints = parent::getConstraints();
+
+    $constraints[] = $constraint_manager->create('ComplexData', array(
+      'value' => array(
+        'Length' => array(
+          'max' => static::EMAIL_MAX_LENGTH,
+          'maxMessage' => t('%name: the e-mail address can not be longer than @max characters.', array('%name' => $this->getFieldDefinition()->getFieldLabel(), '@max' => static::EMAIL_MAX_LENGTH)),
+        )
+      ),
+    ));
+
+    return $constraints;
+  }
 
   /**
    * {@inheritdoc}
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/EntityReferenceItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/EntityReferenceItem.php
index 61f624f..1617504 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/EntityReferenceItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/EntityReferenceItem.php
@@ -7,6 +7,7 @@
 
 namespace Drupal\Core\Field\Plugin\Field\FieldType;
 
+use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldItemBase;
 
 /**
@@ -88,6 +89,43 @@ public function getPropertyDefinitions() {
   /**
    * {@inheritdoc}
    */
+  public static function schema(FieldDefinitionInterface $field_definition) {
+    $target_type = $field_definition->getFieldSetting('target_type');
+    $target_type_info = \Drupal::entityManager()->getDefinition($target_type);
+
+    if (is_subclass_of($target_type_info['class'], '\Drupal\Core\Entity\ContentEntityInterface')) {
+      $columns = array(
+        'target_id' => array(
+          'description' => 'The ID of the target entity.',
+          'type' => 'int',
+          'unsigned' => TRUE,
+          'not null' => TRUE,
+        ),
+      );
+    }
+    else {
+      $columns = array(
+        'target_id' => array(
+          'description' => 'The ID of the target entity.',
+          'type' => 'varchar',
+          'length' => '255',
+        ),
+      );
+    }
+
+    $schema = array(
+      'columns' => $columns,
+      'indexes' => array(
+        'target_id' => array('target_id'),
+      ),
+    );
+
+    return $schema;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function __get($name) {
     $name = ($name == 'value') ? 'target_id' : $name;
     return parent::__get($name);
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/FloatItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/FloatItem.php
index ccfd3c5..27a6001 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/FloatItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/FloatItem.php
@@ -7,6 +7,7 @@
 
 namespace Drupal\Core\Field\Plugin\Field\FieldType;
 
+use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldItemBase;
 
 /**
@@ -43,4 +44,19 @@ public function getPropertyDefinitions() {
     }
     return static::$propertyDefinitions;
   }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function schema(FieldDefinitionInterface $field_definition) {
+    return array(
+      'columns' => array(
+        'value' => array(
+          'type' => 'float',
+          'not null' => FALSE,
+        ),
+      ),
+    );
+  }
+
 }
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/IntegerItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/IntegerItem.php
index 82f088a..1e084dc 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/IntegerItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/IntegerItem.php
@@ -7,6 +7,7 @@
 
 namespace Drupal\Core\Field\Plugin\Field\FieldType;
 
+use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldItemBase;
 use Drupal\Core\TypedData\DataDefinition;
 
@@ -42,4 +43,20 @@ public function getPropertyDefinitions() {
     }
     return static::$propertyDefinitions;
   }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function schema(FieldDefinitionInterface $field_definition) {
+    return array(
+      'columns' => array(
+        'value' => array(
+          'type' => 'int',
+          'not null' => TRUE,
+          'default' => 0,
+        ),
+      ),
+    );
+  }
+
 }
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/LanguageItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/LanguageItem.php
index 3ed6127..89ce29d 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/LanguageItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/LanguageItem.php
@@ -7,6 +7,7 @@
 
 namespace Drupal\Core\Field\Plugin\Field\FieldType;
 
+use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldItemBase;
 use Drupal\Core\Language\Language;
 
@@ -60,6 +61,22 @@ public function getPropertyDefinitions() {
   /**
    * {@inheritdoc}
    */
+  public static function schema(FieldDefinitionInterface $field_definition) {
+    return array(
+      'columns' => array(
+        'value' => array(
+          'type' => 'varchar',
+          'length' => 12,
+          'not null' => TRUE,
+          'default' => '',
+        ),
+      ),
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function setValue($values, $notify = TRUE) {
     // Treat the values as property value of the language property, if no array
     // is given as this handles language codes and objects.
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItem.php
index 9c63b33..43dfaf2 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItem.php
@@ -7,6 +7,7 @@
 
 namespace Drupal\Core\Field\Plugin\Field\FieldType;
 
+use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldItemBase;
 use Drupal\Core\TypedData\DataDefinition;
 
@@ -17,6 +18,9 @@
  *   id = "string",
  *   label = @Translation("String"),
  *   description = @Translation("An entity field containing a string value."),
+ *   settings = {
+ *     "max_length" = "255"
+ *   },
  *   configurable = FALSE
  * )
  */
@@ -42,4 +46,20 @@ public function getPropertyDefinitions() {
     }
     return static::$propertyDefinitions;
   }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function schema(FieldDefinitionInterface $field_definition) {
+    return array(
+      'columns' => array(
+        'value' => array(
+          'type' => 'varchar',
+          'length' => $field_definition->getFieldSetting('max_length'),
+          'not null' => FALSE,
+        ),
+      ),
+    );
+  }
+
 }
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/UriItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/UriItem.php
index 23f9701..d920b2d 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/UriItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/UriItem.php
@@ -7,6 +7,7 @@
 
 namespace Drupal\Core\Field\Plugin\Field\FieldType;
 
+use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldItemBase;
 
 /**
@@ -43,4 +44,19 @@ public function getPropertyDefinitions() {
     }
     return self::$propertyDefinitions;
   }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function schema(FieldDefinitionInterface $field_definition) {
+    return array(
+      'columns' => array(
+        'value' => array(
+          'type' => 'text',
+          'not null' => FALSE,
+        ),
+      ),
+    );
+  }
+
 }
diff --git a/core/modules/email/lib/Drupal/email/ConfigurableEmailItem.php b/core/modules/email/lib/Drupal/email/ConfigurableEmailItem.php
index c67163e..65e08da 100644
--- a/core/modules/email/lib/Drupal/email/ConfigurableEmailItem.php
+++ b/core/modules/email/lib/Drupal/email/ConfigurableEmailItem.php
@@ -19,52 +19,6 @@
 class ConfigurableEmailItem extends EmailItem implements ConfigFieldItemInterface {
 
   /**
-   * Defines the max length for an email address
-   *
-   * The maximum length of an e-mail address is 254 characters. RFC 3696
-   * specifies a total length of 320 characters, but mentions that
-   * addresses longer than 256 characters are not normally useful. Erratum
-   * 1690 was then released which corrected this value to 254 characters.
-   * @see http://tools.ietf.org/html/rfc3696#section-3
-   * @see http://www.rfc-editor.org/errata_search.php?rfc=3696&eid=1690
-   */
-  const EMAIL_MAX_LENGTH = 254;
-
-  /**
-   * {@inheritdoc}
-   */
-  public static function schema(FieldDefinitionInterface $field_definition) {
-    return array(
-      'columns' => array(
-        'value' => array(
-          'type' => 'varchar',
-          'length' => static::EMAIL_MAX_LENGTH,
-          'not null' => FALSE,
-        ),
-      ),
-    );
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function getConstraints() {
-    $constraint_manager = \Drupal::typedData()->getValidationConstraintManager();
-    $constraints = parent::getConstraints();
-
-    $constraints[] = $constraint_manager->create('ComplexData', array(
-      'value' => array(
-        'Length' => array(
-          'max' => static::EMAIL_MAX_LENGTH,
-          'maxMessage' => t('%name: the e-mail address can not be longer than @max characters.', array('%name' => $this->getFieldDefinition()->getFieldLabel(), '@max' => static::EMAIL_MAX_LENGTH)),
-        )
-      ),
-    ));
-
-    return $constraints;
-  }
-
-  /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, array &$form_state, $has_data) {
diff --git a/core/modules/entity_reference/lib/Drupal/entity_reference/ConfigurableEntityReferenceItem.php b/core/modules/entity_reference/lib/Drupal/entity_reference/ConfigurableEntityReferenceItem.php
index dc1bac6..09f6b4d 100644
--- a/core/modules/entity_reference/lib/Drupal/entity_reference/ConfigurableEntityReferenceItem.php
+++ b/core/modules/entity_reference/lib/Drupal/entity_reference/ConfigurableEntityReferenceItem.php
@@ -10,6 +10,7 @@
 use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\ConfigEntityReferenceItemBase;
 use Drupal\Core\Field\ConfigFieldItemInterface;
+use Drupal\Core\Field\Plugin\Field\FieldType\EntityReferenceItem;
 
 /**
  * Alternative plugin implementation of the 'entity_reference' field type.
@@ -26,42 +27,20 @@ class ConfigurableEntityReferenceItem extends ConfigEntityReferenceItemBase impl
    * {@inheritdoc}
    */
   public static function schema(FieldDefinitionInterface $field_definition) {
+    $schema = EntityReferenceItem::schema($field_definition);
+
     $target_type = $field_definition->getFieldSetting('target_type');
     $target_type_info = \Drupal::entityManager()->getDefinition($target_type);
 
     if (is_subclass_of($target_type_info['class'], '\Drupal\Core\Entity\ContentEntityInterface')) {
-      $columns = array(
-        'target_id' => array(
-          'description' => 'The ID of the target entity.',
-          'type' => 'int',
-          'unsigned' => TRUE,
-          'not null' => TRUE,
-        ),
-        'revision_id' => array(
-          'description' => 'The revision ID of the target entity.',
-          'type' => 'int',
-          'unsigned' => TRUE,
-          'not null' => FALSE,
-        ),
-      );
-    }
-    else {
-      $columns = array(
-        'target_id' => array(
-          'description' => 'The ID of the target entity.',
-          'type' => 'varchar',
-          'length' => '255',
-        ),
+      $schema['columns']['revision_id'] = array(
+        'description' => 'The revision ID of the target entity.',
+        'type' => 'int',
+        'unsigned' => TRUE,
+        'not null' => FALSE,
       );
     }
 
-    $schema = array(
-      'columns' => $columns,
-      'indexes' => array(
-        'target_id' => array('target_id'),
-      ),
-    );
-
     return $schema;
   }
 
diff --git a/core/modules/field/lib/Drupal/field/Entity/FieldInstance.php b/core/modules/field/lib/Drupal/field/Entity/FieldInstance.php
index 7e34d3d..1c01abd 100644
--- a/core/modules/field/lib/Drupal/field/Entity/FieldInstance.php
+++ b/core/modules/field/lib/Drupal/field/Entity/FieldInstance.php
@@ -691,4 +691,19 @@ public function getItemDefinition() {
     }
     return $this->itemDefinition;
   }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getSchema() {
+    return $this->field->getSchema();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getColumns() {
+    return $this->field->getColumns();
+  }
+
 }
diff --git a/core/modules/path/lib/Drupal/path/Plugin/Field/FieldType/PathItem.php b/core/modules/path/lib/Drupal/path/Plugin/Field/FieldType/PathItem.php
index 1b0ce50..2fa23d7 100644
--- a/core/modules/path/lib/Drupal/path/Plugin/Field/FieldType/PathItem.php
+++ b/core/modules/path/lib/Drupal/path/Plugin/Field/FieldType/PathItem.php
@@ -7,6 +7,7 @@
 
 namespace Drupal\path\Plugin\Field\FieldType;
 
+use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldItemBase;
 
 /**
@@ -47,4 +48,11 @@ public function getPropertyDefinitions() {
     return static::$propertyDefinitions;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public static function schema(FieldDefinitionInterface $field_definition) {
+    return array();
+  }
+
 }