Are you a C programmer? I'm not, i can still read C programs (and understand at least some of it), but i never dared to write a UDF.
A common C-library for Regular Expressions is PCRE, for an experienced C-programmer it should be easy to implement as UDF. An example (for MySQL) is found at www.mysqludf.org/lib_mysqludf_preg/
I don't know if MySQL's UDF implementation is similar to TD.
Dieter
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