| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Merlin Moncure <mmoncure(at)gmail(dot)com>, Josh Berkus <josh(at)agliodbs(dot)com>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>, Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov>, "David E(dot) Wheeler" <david(at)kineticode(dot)com>, pgsql-hackers(at)postgresql(dot)org, Stephen Frost <sfrost(at)snowman(dot)net> |
| Subject: | Re: Controlling changes in plpgsql variable resolution |
| Date: | 2009-10-21 21:02:51 |
| Message-ID: | 13124.1256158971@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> I actually think that we should not have a GUC for this at all. We
> should have a compiled-in default, and it should be error. If you
> want some other behavior, decorate your functions with #option.
We've agreed that the factory default should be "error", but I don't
think we can go much further than that in the direction of breaking
peoples' code. We need to provide a backwards-compatible option,
IMHO, so that this isn't seen as a roadblock to updating to 8.5.
(You can argue all you want about whether it really is one, but it'll
be seen as one.) And the Oracle-compatible option will be attractive
to people coming in from that side. Reviewing megabytes of pl/sql
code for this kind of gotcha is not fun, and the "error" default would
only help a bit.
One advantage of making the GUC be SUSET is that those who want to take
a paranoid approach here have an easy answer: don't allow it to be
changed from "error". We are allowed to assume that those who do change
it are responsible adults.
regards, tom lane
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