Re: PL/pgSQL PERFORM with CTE

From: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: "David E(dot) Wheeler" <david(at)justatheory(dot)com>, Merlin Moncure <mmoncure(at)gmail(dot)com>, Josh Berkus <josh(at)agliodbs(dot)com>, Marko Tiikkaja <marko(at)joh(dot)to>, Jan Wieck <JanWieck(at)yahoo(dot)com>, Andres Freund <andres(at)2ndquadrant(dot)com>, pgsql-hackers Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: PL/pgSQL PERFORM with CTE
Date: 2013-08-27 20:36:58
Message-ID: CAFj8pRCcpSANqUDfZx3M5xf42N=EVH=Zz4+keoA_wDHPOamARA@mail.gmail.com
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2013/8/27 Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>

> Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> writes:
> > 2013/8/27 David E. Wheeler <david(at)justatheory(dot)com>
> >> But whatever the keyword, I think it makes sense to require one to
> return
> >> results to the caller. Any query that does not return, yield, or capture
> >> (select into) values should just have its results discarded.
>
> > A usual and first solution and syntax is defined by Sybase - we can
> define
> > own syntax, but I don't think so it is necessary be original everywhere.
> > My opinion is surely subjective - this feature is one from few features
> > that are nice on T-SQL.
>
> We aren't following T-SQL on any other syntax detail, so why would we
> start with this one? plpgsql is meant to follow Oracle syntax not T-SQL.
>
> I agree with David that we should use some new syntax to specify
> return-results-directly-to-client, assuming we ever get any such
> functionality. It seems like a pretty bad choice of default behavior,
> which is essentially what you're saying it should be.
>

this functionality should be disabled in functions. This can be allowed
only for procedures started by CALL statements. I don't propose it for
functions.

Regards

Pavel

>
> regards, tom lane
>

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