"Dave Page" <dpage@vale-housing.co.uk> writes:
>> I see no such error here ...
>>
>> regression=# create function pg_catalog.textcat(varchar,text)
>> regression-# returns text as 'textcat' language 'internal';
>> CREATE FUNCTION
> Andreas (Pflug) reckons it's gone in 7.4, but in 7.3.2 I see:
> [ complicated query ]
Oh. I'll bet you're running into the regproc-reverse-conversion
problem. 'textcat' is one of the histogram values appearing in pg_stats
for pg_operator.oprcode, right? The error comes when the planner tries
to convert that string back to OID form. We fixed this in 7.4 by
modifying the way that pg_statistic stores data values, so that no
conversion needs to occur.
regards, tom lane
