Add a primary key.

Parameters

$table: The table to be altered.

$fields: Fields for the primary key.

Throws

DatabaseSchemaObjectDoesNotExistException If the specified table doesn't exist.

DatabaseSchemaObjectExistsException If the specified table already has a primary key.

Overrides DatabaseSchema::addPrimaryKey

File

drupal-7.x/includes/database/pgsql/schema.inc, line 436

Database schema code for PostgreSQL database servers.

Class

DatabaseSchema_pgsql

Code

public function addPrimaryKey($table, $fields) {
  if (!$this->tableExists($table)) {
    throw new DatabaseSchemaObjectDoesNotExistException(t("Cannot add primary key to table %table: table doesn't exist.", array('%table' => $table)));
  }
  if ($this->constraintExists($table, 'pkey')) {
    throw new DatabaseSchemaObjectExistsException(t("Cannot add primary key to table %table: primary key already exists.", array('%table' => $table)));
  }

  $this->connection->query('ALTER TABLE {' . $table . '} ADD PRIMARY KEY (' . implode(',', $fields) . ')');
}