Exception thrown if no driver is specified for a database connection. Hierarchy class

public StatementEmpty::fetchAllKeyed($key_index = 0, $value_index

public static Database::closeConnection($target = NULL, $key = NULL)

abstract public Schema::addIndex($table, $name, $fields, array $spec)

final public static Database::parseConnectionInfo(array $info)

public PagerSelectExtender::setCountQuery(SelectInterface

public QueryConditionTrait::orConditionGroup()

public Schema::indexExists($table, $name)

public Statement::fetchAllKeyed($key_index = 0, $value_index = 1)

protected Tasks::connect() Check