function DefaultTableMapping::getDedicatedRevisionTableName

Generates a table name for a field revision archive table.

Parameters

\Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition: The field storage definition.

bool $is_deleted: (optional) Whether the table name holding the values of a deleted field should be returned.

Return value

string A string containing the generated name for the database table.

File

core/lib/Drupal/Core/Entity/Sql/DefaultTableMapping.php, line 595

Class

DefaultTableMapping

Defines a default table mapping class.

Namespace

Drupal\Core\Entity\Sql

Code

public function getDedicatedRevisionTableName(FieldStorageDefinitionInterface $storage_definition, $is_deleted = FALSE) {
    if ($is_deleted) {
        // When a field is a deleted, the table is renamed to
        // {field_deleted_revision_UNIQUE_STORAGE_ID}. To make sure we don't end
        // up with table names longer than 64 characters, we hash the unique
        // storage identifier and return the first 10 characters so we end up with
        // a short unique ID.
        return "field_deleted_revision_" . substr(hash('sha256', $storage_definition->getUniqueStorageIdentifier()), 0, 10);
    }
    else {
        return $this->generateFieldTableName($storage_definition, TRUE);
    }
}