public Schema::fieldExists($table, $column)

MySQL implementation of \Drupal\Core\Database\Query\Select

public Connection::truncate($table, array $options = array())

public Connection::createDatabase($database)

public Connection::queryTemporary($query, array $args = array()

public Delete::__construct(Connection $connection, $table, array $options =

public Select::isPrepared() Indicates

public Select::union(SelectInterface $query, $type = '')

public Select::compiled() Check whether

public Schema::fieldSetDefault($table, $field, $default)