Tom Lane <> writes:
> Yeah ... if you *don't* know the difference between a DFA and an NFA,
> you're likely to find yourself in over your head.  Having said that,

So, here's a paper I found very nice to get started into this subject:

If anyone's interested into becoming our PostgreSQL regexp hero and
still needs a good kicker, I would recommend starting hereĀ :)

I see this paper mention the regexp code from Plan9, which supports both
UTF8 and other muti-byte encodings, and is released as a library under
the MIT licence:

Dimitri Fontaine     PostgreSQL : Expertise, Formation et Support

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