Re: C function accepting/returning cstring vs. text

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>
Cc: Ivan Sergio Borgonovo <mail(at)webthatworks(dot)it>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: C function accepting/returning cstring vs. text
Date: 2010-01-27 22:46:35
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Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> writes:
> When the set-returning-function feature was written originally, years
> ago, the tuple at a time mode did really work tuple at a time. But it
> had issues and was axed out of the patch before it was committed, to
> keep it simple. The idea was to revisit it at some point, but it hasn't
> bothered anyone enough to fix it. It's basically "not implemented yet".

It depends on call context --- you're speaking of the nodeFunctionScan
context, but I believe an SRF called in the select targetlist will
operate in tuple-at-a-time mode if the function allows.

regards, tom lane

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