Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\user;
Chris@0: 
Chris@0: use Drupal\Core\Entity\ContentEntityTypeInterface;
Chris@0: use Drupal\Core\Entity\Sql\SqlContentEntityStorageSchema;
Chris@0: use Drupal\Core\Field\FieldStorageDefinitionInterface;
Chris@0: 
Chris@0: /**
Chris@0:  * Defines the user schema handler.
Chris@0:  */
Chris@0: class UserStorageSchema extends SqlContentEntityStorageSchema {
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   protected function getEntitySchema(ContentEntityTypeInterface $entity_type, $reset = FALSE) {
Chris@0:     $schema = parent::getEntitySchema($entity_type, $reset);
Chris@0: 
Chris@17:     if ($data_table = $this->storage->getDataTable()) {
Chris@17:       $schema[$data_table]['unique keys'] += [
Chris@17:         'user__name' => ['name', 'langcode'],
Chris@17:       ];
Chris@17:     }
Chris@0: 
Chris@0:     return $schema;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   protected function processIdentifierSchema(&$schema, $key) {
Chris@0:     // The "users" table does not use serial identifiers.
Chris@0:     if ($key != $this->entityType->getKey('id')) {
Chris@0:       parent::processIdentifierSchema($schema, $key);
Chris@0:     }
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   protected function getSharedTableFieldSchema(FieldStorageDefinitionInterface $storage_definition, $table_name, array $column_mapping) {
Chris@0:     $schema = parent::getSharedTableFieldSchema($storage_definition, $table_name, $column_mapping);
Chris@0:     $field_name = $storage_definition->getName();
Chris@0: 
Chris@0:     if ($table_name == 'users_field_data') {
Chris@0:       switch ($field_name) {
Chris@0:         case 'name':
Chris@0:           // Improves the performance of the user__name index defined
Chris@0:           // in getEntitySchema().
Chris@0:           $schema['fields'][$field_name]['not null'] = TRUE;
Chris@0:           // Make sure the field is no longer than 191 characters so we can
Chris@0:           // add a unique constraint in MySQL.
Chris@18:           $schema['fields'][$field_name]['length'] = UserInterface::USERNAME_MAX_LENGTH;
Chris@0:           break;
Chris@0: 
Chris@0:         case 'mail':
Chris@0:           $this->addSharedTableFieldIndex($storage_definition, $schema);
Chris@0:           break;
Chris@0: 
Chris@0:         case 'access':
Chris@0:         case 'created':
Chris@0:           $this->addSharedTableFieldIndex($storage_definition, $schema, TRUE);
Chris@0:           break;
Chris@0:       }
Chris@0:     }
Chris@0: 
Chris@0:     return $schema;
Chris@0:   }
Chris@0: 
Chris@0: }