Re: pgsql: Allow SQL-language functions to return the output of an

This isn't the same thing as allowing RETURNING inside subqueries,  
right?

greg

On 31 Oct 2008, at 07:37 PM, tgl@postgresql.org (Tom Lane) wrote:

> Log Message:
> -----------
> Allow SQL-language functions to return the output of an INSERT/ 
> UPDATE/DELETE
> RETURNING clause, not just a SELECT as formerly.
>
> A side effect of this patch is that when a set-returning SQL  
> function is used
> in a FROM clause, performance is improved because the output is  
> collected into
> a tuplestore within the function, rather than using the less efficient
> value-per-call mechanism.
>
> Modified Files:
> --------------
>    pgsql/doc/src/sgml:
>        xfunc.sgml (r1.132 -> r1.133)
>        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/xfunc.sgml?r1=1.132&r2=1.133 
> )
>    pgsql/src/backend/executor:
>        execQual.c (r1.235 -> r1.236)
>        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/execQual.c?r1=1.235&r2=1.236 
> )
>        functions.c (r1.126 -> r1.127)
>        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/functions.c?r1=1.126&r2=1.127 
> )
>    pgsql/src/backend/tcop:
>        dest.c (r1.72 -> r1.73)
>        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/tcop/dest.c?r1=1.72&r2=1.73 
> )
>    pgsql/src/backend/utils/fmgr:
>        README (r1.15 -> r1.16)
>        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/fmgr/README?r1=1.15&r2=1.16 
> )
>    pgsql/src/include/executor:
>        functions.h (r1.31 -> r1.32)
>        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/functions.h?r1=1.31&r2=1.32 
> )
>    pgsql/src/include/nodes:
>        execnodes.h (r1.193 -> r1.194)
>        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/nodes/execnodes.h?r1=1.193&r2=1.194 
> )
>    pgsql/src/include/tcop:
>        dest.h (r1.54 -> r1.55)
>        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/tcop/dest.h?r1=1.54&r2=1.55 
> )
>    pgsql/src/test/regress/expected:
>        rangefuncs.out (r1.19 -> r1.20)
>        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/rangefuncs.out?r1=1.19&r2=1.20 
> )
>    pgsql/src/test/regress/output:
>        create_function_1.source (r1.33 -> r1.34)
>
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/output/create_function_1.source?r1=1.33&r2=1.34
 
> )
>    pgsql/src/test/regress/sql:
>        rangefuncs.sql (r1.8 -> r1.9)
>        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/sql/rangefuncs.sql?r1=1.8&r2=1.9 
> )
>
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