DROP TEMPORARY TABLE support

[gleonid]

Feature Request

Is your feature request related to a problem? Please describe:
attempt to parse DDL statement like
DROP TEMPORARY TABLE IF EXISTS test``
yields a parse error

Describe the feature you'd like:
Ability to correctly parse both flavors:
DROP /*!40005 TEMPORARY */ TABLE IF EXISTS test `DROP TEMPORARY TABLE IF EXISTS `test
and have an indicator in AST model on whether TEMPORARY keyword was used