"Pavel Stehule" <[EMAIL PROTECTED]> writes:
> I found small bug

> regexp_split_to_array('123456','1');
> regexp_split_to_array('123456','6');
> regexp_split_to_array('123456','.');

> these parameters hangs backend.

This code's got more problems than that :-(

The one that's bothering me right now is that regexp_match() and
regexp_split() cache a compiled regex on first entry to the function,
and then blithely assume it will still be there on repeated calls.

I think probably the best thing to do is do all the matching on the
first call, and have the saved state include an array of character
positions of matches; then repeat calls to the SRF just iterate through
the array.

It seems a bit short of comments too.  Working on it now.

                        regards, tom lane

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