Re: Why no CONSTANT for row variables in plpgsql?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com>
Cc: Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Why no CONSTANT for row variables in plpgsql?
Date: 2015-10-20 23:29:47
Message-ID: 20038.1445383787@sss.pgh.pa.us
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Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com> writes:
> On 10/19/15 7:12 PM, Tom Lane wrote:
>> IMO, we ought to get rid of the use of that representation for
>> composite-type variables and use the RECORD code paths for them,

> That also means there would only need to be changes to RECORD to allow
> CONSTANT, default, etc.

> Do you know offhand what the starting point for changing that would be?
> build_datatype()?

Well, definitely build_datatype would want to select PLPGSQL_TTYPE_REC not
PLPGSQL_TTYPE_ROW when seeing TYPTYPE_COMPOSITE. I suspect that's just a
small tip of a large iceberg, though.

regards, tom lane

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