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 ec49cdb..4938c48 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/IntegerItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/IntegerItem.php
@@ -18,7 +18,10 @@
  *   id = "integer",
  *   label = @Translation("Integer"),
  *   description = @Translation("An entity field containing an integer value."),
- *   configurable = FALSE
+ *   configurable = FALSE,
+ *   settings = {
+ *     "unsigned" = FALSE,
+ *   },
  * )
  */
 class IntegerItem extends FieldItemBase {
@@ -47,12 +50,30 @@ public function getPropertyDefinitions() {
   /**
    * {@inheritdoc}
    */
+  public function getConstraints() {
+    $constraints = parent::getConstraints();
+
+    // If this is an unsigned integer, add a validation constraint for the
+    // integer to be positive.
+    if ($this->getFieldSetting('unsigned')) {
+      $constraint_manager = \Drupal::typedDataManager()->getValidationConstraintManager();
+      $constraints[] = $constraint_manager->create('Range', array('min' => 0));
+    }
+
+    return $constraints;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public static function schema(FieldDefinitionInterface $field_definition) {
     return array(
       'columns' => array(
         'value' => array(
           'type' => 'int',
           'not null' => TRUE,
+          // Expose the 'unsigned' setting in the field item schema.
+          'unsigned' => (bool) $field_definition->getSetting('unsigned'),
         ),
       ),
     );
diff --git a/core/modules/aggregator/lib/Drupal/aggregator/Entity/Feed.php b/core/modules/aggregator/lib/Drupal/aggregator/Entity/Feed.php
index 61eae79..3ae5b1f 100644
--- a/core/modules/aggregator/lib/Drupal/aggregator/Entity/Feed.php
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Entity/Feed.php
@@ -125,7 +125,8 @@ public static function baseFieldDefinitions($entity_type) {
     $fields['fid'] = FieldDefinition::create('integer')
       ->setLabel(t('Feed ID'))
       ->setDescription(t('The ID of the aggregator feed.'))
-      ->setReadOnly(TRUE);
+      ->setReadOnly(TRUE)
+      ->setSetting('unsigned', TRUE);
 
     $fields['uuid'] = FieldDefinition::create('uuid')
       ->setLabel(t('UUID'))
@@ -146,7 +147,8 @@ public static function baseFieldDefinitions($entity_type) {
 
     $fields['refresh'] = FieldDefinition::create('integer')
       ->setLabel(t('Refresh'))
-      ->setDescription(t('How often to check for new feed items, in seconds.'));
+      ->setDescription(t('How often to check for new feed items, in seconds.'))
+      ->setSetting('unsigned', TRUE);
 
     // @todo Convert to a "timestamp" field in https://drupal.org/node/2145103.
     $fields['checked'] = FieldDefinition::create('integer')
diff --git a/core/modules/aggregator/lib/Drupal/aggregator/Entity/Item.php b/core/modules/aggregator/lib/Drupal/aggregator/Entity/Item.php
index e48e45d9..509265b 100644
--- a/core/modules/aggregator/lib/Drupal/aggregator/Entity/Item.php
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Entity/Item.php
@@ -64,7 +64,8 @@ public static function baseFieldDefinitions($entity_type) {
     $fields['iid'] = FieldDefinition::create('integer')
       ->setLabel(t('Aggregator item ID'))
       ->setDescription(t('The ID of the feed item.'))
-      ->setReadOnly(TRUE);
+      ->setReadOnly(TRUE)
+      ->setSetting('unsigned', TRUE);
 
     $fields['fid'] = FieldDefinition::create('entity_reference')
       ->setLabel(t('Aggregator feed ID'))
diff --git a/core/modules/block/custom_block/lib/Drupal/custom_block/Entity/CustomBlock.php b/core/modules/block/custom_block/lib/Drupal/custom_block/Entity/CustomBlock.php
index 68c3b10..bf9e6b8 100644
--- a/core/modules/block/custom_block/lib/Drupal/custom_block/Entity/CustomBlock.php
+++ b/core/modules/block/custom_block/lib/Drupal/custom_block/Entity/CustomBlock.php
@@ -168,7 +168,8 @@ public static function baseFieldDefinitions($entity_type) {
     $fields['id'] = FieldDefinition::create('integer')
       ->setLabel(t('Custom block ID'))
       ->setDescription(t('The custom block ID.'))
-      ->setReadOnly(TRUE);
+      ->setReadOnly(TRUE)
+      ->setSetting('unsigned', TRUE);
 
     $fields['uuid'] = FieldDefinition::create('uuid')
       ->setLabel(t('UUID'))
@@ -178,7 +179,8 @@ public static function baseFieldDefinitions($entity_type) {
     $fields['revision_id'] = FieldDefinition::create('integer')
       ->setLabel(t('Revision ID'))
       ->setDescription(t('The revision ID.'))
-      ->setReadOnly(TRUE);
+      ->setReadOnly(TRUE)
+      ->setSetting('unsigned', TRUE);
 
     $fields['langcode'] = FieldDefinition::create('language')
       ->setLabel(t('Language code'))
diff --git a/core/modules/comment/lib/Drupal/comment/Entity/Comment.php b/core/modules/comment/lib/Drupal/comment/Entity/Comment.php
index 9732c91..8ca780e 100644
--- a/core/modules/comment/lib/Drupal/comment/Entity/Comment.php
+++ b/core/modules/comment/lib/Drupal/comment/Entity/Comment.php
@@ -356,7 +356,8 @@ public static function baseFieldDefinitions($entity_type) {
     $fields['cid'] = FieldDefinition::create('integer')
       ->setLabel(t('Comment ID'))
       ->setDescription(t('The comment ID.'))
-      ->setReadOnly(TRUE);
+      ->setReadOnly(TRUE)
+      ->setSetting('unsigned', TRUE);
 
     $fields['uuid'] = FieldDefinition::create('uuid')
       ->setLabel(t('UUID'))
diff --git a/core/modules/file/lib/Drupal/file/Entity/File.php b/core/modules/file/lib/Drupal/file/Entity/File.php
index 816435b..e880102 100644
--- a/core/modules/file/lib/Drupal/file/Entity/File.php
+++ b/core/modules/file/lib/Drupal/file/Entity/File.php
@@ -228,7 +228,8 @@ public static function baseFieldDefinitions($entity_type) {
     $fields['fid'] = FieldDefinition::create('integer')
       ->setLabel(t('File ID'))
       ->setDescription(t('The file ID.'))
-      ->setReadOnly(TRUE);
+      ->setReadOnly(TRUE)
+      ->setSetting('unsigned', TRUE);
 
     $fields['uuid'] = FieldDefinition::create('uuid')
       ->setLabel(t('UUID'))
@@ -258,7 +259,8 @@ public static function baseFieldDefinitions($entity_type) {
 
     $fields['filesize'] = FieldDefinition::create('integer')
       ->setLabel(t('File size'))
-      ->setDescription(t('The size of the file in bytes.'));
+      ->setDescription(t('The size of the file in bytes.'))
+      ->setSetting('unsigned', TRUE);
 
     $fields['status'] = FieldDefinition::create('integer')
       ->setLabel(t('Status'))
diff --git a/core/modules/node/lib/Drupal/node/Entity/Node.php b/core/modules/node/lib/Drupal/node/Entity/Node.php
index ec3533a..91c98f3 100644
--- a/core/modules/node/lib/Drupal/node/Entity/Node.php
+++ b/core/modules/node/lib/Drupal/node/Entity/Node.php
@@ -348,7 +348,8 @@ public static function baseFieldDefinitions($entity_type) {
     $fields['nid'] = FieldDefinition::create('integer')
       ->setLabel(t('Node ID'))
       ->setDescription(t('The node ID.'))
-      ->setReadOnly(TRUE);
+      ->setReadOnly(TRUE)
+      ->setSetting('unsigned', TRUE);
 
     $fields['uuid'] = FieldDefinition::create('uuid')
       ->setLabel(t('UUID'))
@@ -358,7 +359,8 @@ public static function baseFieldDefinitions($entity_type) {
     $fields['vid'] = FieldDefinition::create('integer')
       ->setLabel(t('Revision ID'))
       ->setDescription(t('The node revision ID.'))
-      ->setReadOnly(TRUE);
+      ->setReadOnly(TRUE)
+      ->setSetting('unsigned', TRUE);
 
     $fields['type'] = FieldDefinition::create('entity_reference')
       ->setLabel(t('Type'))
diff --git a/core/modules/shortcut/lib/Drupal/shortcut/Entity/Shortcut.php b/core/modules/shortcut/lib/Drupal/shortcut/Entity/Shortcut.php
index 7b2017b..75726b9 100644
--- a/core/modules/shortcut/lib/Drupal/shortcut/Entity/Shortcut.php
+++ b/core/modules/shortcut/lib/Drupal/shortcut/Entity/Shortcut.php
@@ -138,7 +138,8 @@ public static function baseFieldDefinitions($entity_type) {
     $fields['id'] = FieldDefinition::create('integer')
       ->setLabel(t('ID'))
       ->setDescription(t('The ID of the shortcut.'))
-      ->setReadOnly(TRUE);
+      ->setReadOnly(TRUE)
+      ->setSetting('unsigned', TRUE);
 
     $fields['uuid'] = FieldDefinition::create('uuid')
       ->setLabel(t('UUID'))
diff --git a/core/modules/system/lib/Drupal/system/Tests/Entity/EntityQueryTest.php b/core/modules/system/lib/Drupal/system/Tests/Entity/EntityQueryTest.php
index b33285c..ea8f520 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Entity/EntityQueryTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Entity/EntityQueryTest.php
@@ -235,6 +235,7 @@ function testEntityQuery() {
     // word but allows us to test revisions and string operations.
     $ids = $this->factory->get('entity_test_mulrev')
       ->condition("$greetings.value", 'merhaba')
+      ->sort('id')
       ->execute();
     $entities = entity_load_multiple('entity_test_mulrev', $ids);
     foreach ($entities as $entity) {
@@ -267,12 +268,14 @@ function testEntityQuery() {
     $this->assertIdentical($results, $assert);
     $results = $this->factory->get('entity_test_mulrev')
       ->condition("$greetings.value", 'siema', 'STARTS_WITH')
+      ->sort('revision_id')
       ->execute();
     // Now we only get the ones that originally were siema, entity id 8 and
     // above.
     $this->assertIdentical($results, array_slice($assert, 4, 8, TRUE));
     $results = $this->factory->get('entity_test_mulrev')
       ->condition("$greetings.value", 'a', 'ENDS_WITH')
+      ->sort('revision_id')
       ->execute();
     // It is very important that we do not get the ones which only have
     // xsiemax despite originally they were merhaba, ie. ended with a.
diff --git a/core/modules/system/tests/modules/entity_test/lib/Drupal/entity_test/Entity/EntityTest.php b/core/modules/system/tests/modules/entity_test/lib/Drupal/entity_test/Entity/EntityTest.php
index b7f799c..8431eae 100644
--- a/core/modules/system/tests/modules/entity_test/lib/Drupal/entity_test/Entity/EntityTest.php
+++ b/core/modules/system/tests/modules/entity_test/lib/Drupal/entity_test/Entity/EntityTest.php
@@ -127,7 +127,8 @@ public static function baseFieldDefinitions($entity_type) {
     $fields['id'] = FieldDefinition::create('integer')
       ->setLabel(t('ID'))
       ->setDescription(t('The ID of the test entity.'))
-      ->setReadOnly(TRUE);
+      ->setReadOnly(TRUE)
+      ->setSetting('unsigned', TRUE);
 
     $fields['uuid'] = FieldDefinition::create('uuid')
       ->setLabel(t('UUID'))
diff --git a/core/modules/system/tests/modules/entity_test/lib/Drupal/entity_test/Entity/EntityTestMulRev.php b/core/modules/system/tests/modules/entity_test/lib/Drupal/entity_test/Entity/EntityTestMulRev.php
index e0dce68..a73b08d 100644
--- a/core/modules/system/tests/modules/entity_test/lib/Drupal/entity_test/Entity/EntityTestMulRev.php
+++ b/core/modules/system/tests/modules/entity_test/lib/Drupal/entity_test/Entity/EntityTestMulRev.php
@@ -53,7 +53,8 @@ public static function baseFieldDefinitions($entity_type) {
     $fields['revision_id'] = FieldDefinition::create('integer')
       ->setLabel(t('Revision ID'))
       ->setDescription(t('The version id of the test entity.'))
-      ->setReadOnly(TRUE);
+      ->setReadOnly(TRUE)
+      ->setSetting('unsigned', TRUE);
 
     $fields['default_langcode'] = FieldDefinition::create('boolean')
       ->setLabel(t('Default language'))
diff --git a/core/modules/system/tests/modules/entity_test/lib/Drupal/entity_test/Entity/EntityTestRev.php b/core/modules/system/tests/modules/entity_test/lib/Drupal/entity_test/Entity/EntityTestRev.php
index a31dcdc..29e2a13 100644
--- a/core/modules/system/tests/modules/entity_test/lib/Drupal/entity_test/Entity/EntityTestRev.php
+++ b/core/modules/system/tests/modules/entity_test/lib/Drupal/entity_test/Entity/EntityTestRev.php
@@ -72,7 +72,8 @@ public static function baseFieldDefinitions($entity_type) {
     $fields['revision_id'] = FieldDefinition::create('integer')
       ->setLabel(t('Revision ID'))
       ->setDescription(t('The version id of the test entity.'))
-      ->setReadOnly(TRUE);
+      ->setReadOnly(TRUE)
+      ->setSetting('unsigned', TRUE);
 
     return $fields;
   }
diff --git a/core/modules/taxonomy/lib/Drupal/taxonomy/Entity/Term.php b/core/modules/taxonomy/lib/Drupal/taxonomy/Entity/Term.php
index 32e0e9c..539e4d0 100644
--- a/core/modules/taxonomy/lib/Drupal/taxonomy/Entity/Term.php
+++ b/core/modules/taxonomy/lib/Drupal/taxonomy/Entity/Term.php
@@ -201,7 +201,8 @@ public static function baseFieldDefinitions($entity_type) {
     $fields['tid'] = FieldDefinition::create('integer')
       ->setLabel(t('Term ID'))
       ->setDescription(t('The term ID.'))
-      ->setReadOnly(TRUE);
+      ->setReadOnly(TRUE)
+      ->setSetting('unsigned', TRUE);
 
     $fields['uuid'] = FieldDefinition::create('uuid')
       ->setLabel(t('UUID'))
@@ -235,7 +236,8 @@ public static function baseFieldDefinitions($entity_type) {
       ->setDescription(t('The parents of this term.'))
       // Save new terms with no parents by default.
       ->setSetting('default_value', 0)
-      ->setComputed(TRUE);
+      ->setComputed(TRUE)
+      ->setSetting('unsigned', TRUE);
 
     $fields['changed'] = FieldDefinition::create('integer')
       ->setLabel(t('Changed'))
diff --git a/core/modules/user/lib/Drupal/user/Entity/User.php b/core/modules/user/lib/Drupal/user/Entity/User.php
index f9db482..8a2f577 100644
--- a/core/modules/user/lib/Drupal/user/Entity/User.php
+++ b/core/modules/user/lib/Drupal/user/Entity/User.php
@@ -427,7 +427,8 @@ public static function baseFieldDefinitions($entity_type) {
     $fields['uid'] = FieldDefinition::create('integer')
       ->setLabel(t('User ID'))
       ->setDescription(t('The user ID.'))
-      ->setReadOnly(TRUE);
+      ->setReadOnly(TRUE)
+      ->setSetting('unsigned', TRUE);
 
     $fields['uuid'] = FieldDefinition::create('uuid')
       ->setLabel(t('UUID'))