function Schema::addIndex

Same name in this branch

11.1.x core/lib/Drupal/Core/Database/Schema.php \Drupal\Core\Database\Schema::addIndex()
11.1.x core/modules/pgsql/src/Driver/Database/pgsql/Schema.php \Drupal\pgsql\Driver\Database\pgsql\Schema::addIndex()
11.1.x core/modules/sqlite/src/Driver/Database/sqlite/Schema.php \Drupal\sqlite\Driver\Database\sqlite\Schema::addIndex()

Overrides Schema::addIndex

File

core/modules/mysql/src/Driver/Database/mysql/Schema.php, line 571

Class

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

Namespace

Drupal\mysql\Driver\Database\mysql

Code

public function addIndex($table, $name, $fields, array $spec) {
    if (!$this->tableExists($table)) {
        throw new SchemaObjectDoesNotExistException("Cannot add index '{$name}' to table '{$table}': table doesn't exist.");
    }
    if ($this->indexExists($table, $name)) {
        throw new SchemaObjectExistsException("Cannot add index '{$name}' to table '{$table}': index already exists.");
    }
    $spec['indexes'][$name] = $fields;
    $indexes = $this->getNormalizedIndexes($spec);
    $this->connection
        ->query('ALTER TABLE {' . $table . '} ADD INDEX [' . $name . '] (' . $this->createKeySql($indexes[$name]) . ')');
}