Re: OPAQUE and 7.2-7.3 upgrade

From: Philip Warner <pjw(at)rhyme(dot)com(dot)au>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>, Oliver Elphick <olly(at)lfix(dot)co(dot)uk>, Dave Page <dpage(at)vale-housing(dot)co(dot)uk>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: OPAQUE and 7.2-7.3 upgrade
Date: 2002-09-13 04:18:17
Message-ID: 5.1.0.14.0.20020913141417.03f1fe88@mail.rhyme.com.au
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At 12:11 AM 13/09/2002 -0400, Tom Lane wrote:
>How can we accommodate
>those old dumps without abandoning the attempt to be tighter about
>datatypes?

Maybe I'm missing something, but:

1. Dump from 7.2 has 'Create Function....OPAQUE'

2. 7.3 installation has plpgsql library with new function info macro that
defines the builtin return type correctly

3. Script runs 'Create Function....OPAQUE'; the backend enquires about the
function in the 'plpgsql.so' library, notes that it really returns
'language_handler', issues a NOTICE and modifies the definition
appropriately before adding it to the database.

I'm not sure it's all that valuable, but if we wanted to allow for function
to return user-defined types, then the function manager macros would have
to include a return type name, not number.

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