Re: Per-function search_path => per-function GUC settings

On Sat, Sep 01, 2007 at 03:03:14PM -0400, Tom Lane wrote:
> Jeff Davis <pgsql(at)j-davis(dot)com> writes:
> > Can we also provide syntax which would be equivalent to setting "var"
> > for the function to be whatever the current value happens to be when the
> > ALTER FUNCTION is run? Possible syntax might be something like:
>
> > ALTER FUNCTION func(args) SET var TO CURRENT;
>
> Hmmm ... that's certainly do-able, though I'm not sure how much it helps
> the use-case you suggest. The search path still has to be set at the
> top of the module script, no?

Better one place than scores of places...

> However, I like an explicit option of this sort a lot better than the
> automatic version Greg was suggesting ... I'm willing to do it if people
> want it.
>
> One problem is that we'd have to make CURRENT a reserved word to make it
> work exactly like that. Can anyone think of a variant syntax that
> doesn't need a new reserved word?

I'm not good at the synonym game, but I did have an idea related to the
SET syntax, so I'll just post it here...

If you needed to set a bunch of GUCs on a function, having a load of SET
statements might be a bit tedious... I'm wondering if there's some way
to specify them like an array?
SET {'search_path=CURRENT', 'enable_seqscan=false', ...}

Or now that we have arrays of complex types, perhaps an array of type
GUC...

Either case would at least take care of CURRENT...
--
Decibel!, aka Jim Nasby decibel(at)decibel(dot)org
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