Re: unaccent(text) fails depending on search_path (WAS: pg_upgrade fails saying function unaccent(text) doesn't exist)

Bruce Momjian <bruce(at)momjian(dot)us> writes:
> On Fri, Sep 7, 2018 at 06:43:52PM -0400, Tom Lane wrote:
>> AFAICS there are no internal-to-the-C-code search path dependencies
>> in earthdistance.c, so it's not the same problem.

> Uh, there is an SQL function that calls functions from the module that
> fail. It would be a CREATE FUNCTION patch, I think, but I thought the
> issue was the same.

Not really. You could either interpolate @extschema@ into the text
of the referencing function, or (though much inferior for performance)
have it SET SEARCH_PATH FROM CURRENT. Either of those changes would
involve an extension version bump since they're changing the extension
script. What's more of a problem is that we could no longer claim
the extension is relocatable. My unaccent fix dodged that by looking
up the C function's current schema, but I don't think there's any
equivalent functionality available at SQL level.

regards, tom lane