Add a primary key.

Parameters

$table: The table to be altered.

$fields: Fields for the primary key.

Overrides DatabaseSchema::addPrimaryKey

File

includes/database/mysql/schema.inc, line 405

Class

DatabaseSchema_mysql

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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