public function Schema::addPrimaryKey in Drupal 8

Same name in this branch

1. 8 core/lib/Drupal/Core/Database/Schema.php \Drupal\Core\Database\Schema::addPrimaryKey()
2. 8 core/lib/Drupal/Core/Database/Driver/sqlite/Schema.php \Drupal\Core\Database\Driver\sqlite\Schema::addPrimaryKey()
3. 8 core/lib/Drupal/Core/Database/Driver/pgsql/Schema.php \Drupal\Core\Database\Driver\pgsql\Schema::addPrimaryKey()
4. 8 core/lib/Drupal/Core/Database/Driver/mysql/Schema.php \Drupal\Core\Database\Driver\mysql\Schema::addPrimaryKey()

Same name and namespace in other branches

1. 9 core/lib/Drupal/Core/Database/Driver/mysql/Schema.php \Drupal\Core\Database\Driver\mysql\Schema::addPrimaryKey()

Add a primary key.

Parameters

$table: The table to be altered.

$fields: Fields for the primary key.

Throws

\Drupal\Core\Database\SchemaObjectDoesNotExistException If the specified table doesn't exist.

\Drupal\Core\Database\SchemaObjectExistsException If the specified table already has a primary key.

Overrides Schema::addPrimaryKey

File

core/lib/Drupal/Core/Database/Driver/mysql/Schema.php, line 526

Class

Schema

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

Namespace

Drupal\Core\Database\Driver\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) . ')');
}