DatabaseSchema_mysql::addPrimaryKey
public function DatabaseSchema_mysql::addPrimaryKey
public DatabaseSchema_mysql::addPrimaryKey($table, $fields)
Add a primary key.
Parameters
$table: The table to be altered.
$fields: Fields for the primary key.
Throws
DatabaseSchemaObjectDoesNotExistException If the specified table doesn't exist.
DatabaseSchemaObjectExistsException If the specified table already has a primary key.
Overrides DatabaseSchema::addPrimaryKey
File
- includes/database/mysql/schema.inc, line 400
- Database schema code for MySQL database servers.
Class
Code
public function addPrimaryKey($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->indexExists($table, 'PRIMARY')) { 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 (' . $this->createKeySql($fields) . ')'); }
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