Add a primary key.

Parameters

$table: The table to be altered.

$fields: Fields for the primary key.

Overrides Schema::addPrimaryKey

File

core/modules/mysql/src/Driver/Database/mysql/Schema.php, line 499

Class

Schema

MySQL implementation of \Drupal\Core\Database\Schema.

Namespace

Drupal\mysql\Driver\Database\mysql

Code

public function addPrimaryKey($table, $fields) {
  if (!$this->tableExists($table)) {
    throw new SchemaObjectDoesNotExistException("Cannot add primary key to table '{$table}': table doesn't exist.");
  }
  if ($this->indexExists($table, 'PRIMARY')) {
    throw new SchemaObjectExistsException("Cannot add primary key to table '{$table}': primary key already exists.");
  }
  $this->connection
    ->query('ALTER TABLE {' . $table . '} ADD PRIMARY KEY (' . $this->createKeySql($fields) . ')');
}

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