I wrote:
> It looks to me like RS_isRegis() needs to be tightened up a bit anyway:
> it will accept "^foo" which is valid regex but not valid regis, leading
> to an error being thrown which is not what we want.
I experimented with this and verified that the error could be reached
with a hacked-up affix file.
> If we tighten it to exactly match what RS_compile() will take ... say
> by using the same state-machine logic ... then indeed the ereports
> are internal and can be demoted to elog's. If we make them elogs then
> ISTM they ought to keep saying regis, just so we know where to look
> if they ever do fail ;-)
Patch committed along these lines.
regards, tom lane
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