abstract public Schema::addUniqueKey($table, $name, $fields)
Add a unique key.
Parameters
$table: The table to be altered.
$name: The name of the key.
$fields: An array of field names.
Throws
\Drupal\Core\Database\SchemaObjectDoesNotExistException If the specified table doesn't exist.
\Drupal\Core\Database\SchemaObjectExistsException If the specified table already has a key by that name.
File
- core/lib/Drupal/Core/Database/Schema.php, line 422
Class
- Schema
- Provides a base implementation for Database Schema.
Namespace
Drupal\Core\Database
Code
abstract public function addUniqueKey($table, $name, $fields);
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