protected function DatabaseSchema_pgsql::constraintExists

7.x schema.inc protected DatabaseSchema_pgsql::constraintExists($table, $name)

Helper function: check if a constraint (PK, FK, UK) exists.

Parameters

$table: The name of the table.

$name: The name of the constraint (typically 'pkey' or '[constraint]_key').

4 calls to DatabaseSchema_pgsql::constraintExists()

DatabaseSchema_pgsql::addPrimaryKey in drupal-7.x/includes/database/pgsql/schema.inc: Add a primary key.
DatabaseSchema_pgsql::addUniqueKey in drupal-7.x/includes/database/pgsql/schema.inc: Add a unique key.
DatabaseSchema_pgsql::dropPrimaryKey in drupal-7.x/includes/database/pgsql/schema.inc: Drop the primary key.
DatabaseSchema_pgsql::dropUniqueKey in drupal-7.x/includes/database/pgsql/schema.inc: Drop a unique key.

File

drupal-7.x/includes/database/pgsql/schema.inc, line 431: Database schema code for PostgreSQL database servers.

Class

DatabaseSchema_pgsql

Code

protected function constraintExists($table, $name) {
  $constraint_name = '{' . $table . '}_' . $name;
  return (bool) $this->connection->query("SELECT 1 FROM pg_constraint WHERE conname = '$constraint_name'")->fetchField();
}