switch issue

[Liquid Fire]

I have a database class i am working on as part of my framework and have a small issue.  I am using the PDO object which helps a lot in making the database work with multiple database software easily however there a several function i have where i am going to need to do a switch of the database type and it seem that there should be a way then having this switch statement in each of these functions.  is there a way where i can extract that code so i do not have to rewrite it for every function that needs it.

[trq]

You should only ever need to choose your database driver (once) when you first initiate the PDO object.

[Liquid Fire]

well the common function i think are the same but what about the syntax for getting table information, seeing if a table exists, getting list of tables, getting primary key, getting relationships, getting indexes, adding/removing indexes, adding/removing relationships, tables, fields, etc...  hell i am not even sure if my insert/update statement are the same in all table as i have only every worked in mysql.  I just i need a way to see all the different common statements in the different database software.

[trq]

You just need to stick to the standard ANSI/SQL wherever possible and don't rely on any features of a particular DBMS system. If your not sure what standard SQL looks like, youve got some googling to do. Its an entire language and isn't going to be easily described in a forum reply.