Alvaro Herrera <alvherre@commandprompt.com> writes:
> I came up with the attached patch.

I wasn't envisioning anything anywhere near this invasive. We only
need locations on constants in a few contexts, I think.

BTW, you broke _equalAConst() ... it was a bad idea anyway to recast
it on the assumption that there would never again be more than one
field.

regards, tom lane

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