Are there any modules for generating SQL queries?

I have some prototype code for generating simple queries, wyhere fields, sorting order, and where clauses with a mix of ANDs and ORs can be specified. But before I continue on this track....is there already such a module?

I've found Text::Query::BuildSQL, but this uses AltaVista-like syntax and isn't what I'm looking for.

The reason I want more detailed functionality is so that

• I can specify a nifty search widget for specific tables on the web that lets the user choose fields to view, filter by, and sorting order (with appropriate validation for security protection, of course);
• I can also re-use a lot of this code for various classes/objects which work on these tables;
• And in some ways, it makes the code more readible than to inline an SQL statement.

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