Re: calling a function that takes a row type and returns a set of rows - Mailing list pgsql-general

2008/10/10 Dimitri Fontaine <dfontaine@hi-media.com>:
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> Hi,
>
> Le 10 oct. 08 à 21:22, Robert Haas a écrit :
>>
>> I can't find any legal way of calling this function.
>>
>> SELECT bar(f) FROM foo f;
>> ERROR:  set-valued function called in context that cannot accept a set
>>
>> SELECT * FROM foo f, bar(f);
>> ERROR:  function expression in FROM may not refer to other relations
>> of same query level
>>
>> Any help appreciated.
>
>
> You need LATERAL support for this:
>  SELECT * FROM foo f LATERAL bar(f);
>
> I'm not sure about the syntax, but LATERAL is a standard JOIN type wherein
> upper "nodes" are visible.
> - --
> dim
>

no, this strange syntax is far to any standard. Solution is using
dynamic cursor ala DB2 (that isn't supported in postgres) - select *
from fce(cursor(select .... from tab))

Regards
Pavel Stehule

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