Re: function to return query result

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От Peter Maas
Тема Re: function to return query result
Дата
Msg-id 3A26306F.68E798BF@mrinfo.de
обсуждение исходный текст
Ответ на function to return query result  (Peter Maas <pm@mrinfo.de>)
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Ashley Clark wrote:
>Why don't you use a view? Something like:
>
>create view test as select a.a, a.b, a.c, b.a, b.b
>from a, b
>where a.id=b.id;
>
>Then you can do selects on the view using a where clause:
>
>select *
>from test
>where a.a='somevalue';

Hi,

yes, but I wanted to encapsulate the more complicated data internals
(joins, sub queries, etc) in server functions. I could have used
the server functions or parameterized views in many places. Now if I
need the results e.g. in PHP, Java and a Windows program I have to
code and to maintain 3 functions performing the same task. Sometimes
a recordset evaluation needs more than one step with intermediate
temporary tables etc. You need a function for this.

Thanks for your help,

Peter.

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