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.
Overrides Schema::addUniqueKey
File
core/lib/Drupal/Core/Database/Driver/pgsql/Schema.php, line 642
Class
Schema Post