Tom Lane wrote:
Wait a second ... I just thought of a counterexample that destroys the
entire concept.  Consider the pattern 'A__B', which clearly is supposed
to match strings of four *characters*.  With the proposed patch in
place, it would match strings of four *bytes*.  Which is not the correct

From what I can see the code is quite careful about when it calls NextByte vs NextChar, and after _ it calls NextChar.

So I'll test for this, but I think it's safe.



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