Re: FETCH in subqueries or CTEs

Hello

2012/8/24 Craig Ringer <ringerc@ringerc.id.au>:
> Hi all
>
> I've noticed that FETCH doesn't seem to be supported in subqueries or in
> CTEs.
>
> Is there a specific reason for that, beyond "nobody's needed it and
> implemented it"? I'm not complaining at all, merely curious.
>
> A toy example:
>
>     DECLARE somecursor CURSOR FOR SELECT generate_series(1,1000)
>     SELECT * FROM ( FETCH ALL FROM somecursor ) x;
>
> produces:
>
>     ERROR:  syntax error at or near "FETCH"
>     LINE 1: SELECT * FROM ( FETCH ALL FROM somecursor ) x;
>                         ^
> Same with a CTE:
>
>      WITH x AS ( FETCH ALL FROM somecursor ) SELECT * FROM x;
>
> ERROR:  syntax error at or near "FETCH"
> LINE 1: WITH x AS ( FETCH ALL FROM somecursor ) SELECT * FROM x;
>

you can't mix planned and unplanned statements together - think about
stored plans every time

Regards

Pavel

> --
> Craig Ringer
>
>
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