SQL::Preproc TODO:

- test with Apache/mod_perl

- implement USING syntax

- finish SQL::Preproc::Teradata

- build test for SQL::Preproc::Teradata

- test with Apache/mod_perl

- finish SQL::Preproc::Runtime to reduce translated code size

- create SQL::Preproc::MySQL

- build test for SQL::Preproc::MySQL

- create SQL::Preproc::Pg

- build test for SQL::Preproc::Pg

- create SQL::Preproc::Oracle

- build test for SQL::Preproc::Oracle

