Re: How do I get query result(select e.g.) from a dynamic command(EXECUTE)?

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От Wei Wang
Тема Re: How do I get query result(select e.g.) from a dynamic command(EXECUTE)?
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Msg-id 02cc01c3f6e2$3d65f640$726ee880@weiwang
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Ответ на How do I get query result(select e.g.) from a dynamic command(EXECUTE)?  ("Wei Wang" <ww220@cam.ac.uk>)
Список pgsql-general
Sorry. I just found it in the documentation. FOR-IN-EXECUTE or
OPEN-FOR-EXECUTE.


----- Original Message -----
From: "Wei Wang" <ww220@cam.ac.uk>
To: "pgsql" <pgsql-general@postgresql.org>
Sent: Thursday, February 19, 2004 11:50 AM
Subject: [GENERAL] How do I get query result(select e.g.) from a dynamic
command(EXECUTE)?


> Hi,
>
> I want to do a select in dynamic command, something like:
>
> TRIGGER FUNCTION
> DECLARE
>     table_name_suffix text;
>     temp_result RECORD;
>     temp_result2 RECORD;
>
> ...
>
> BEGIN
>     --initialization of table_name_suffix(from TG_RELNAME e.g.)
>
>
>     select into temp_result from
> ''fixed_table_name_prefix''||table_name_suffix where another_table_name =
> abc;
>
>     --Then I want to use part of the result as part of the table name for
my
> next query
>     select into temp_result2 from
> ''fixed_table_name_prefix''||temp_result.anothertablename;
>
> END
>
> I know that SELECT INTO doesn't support dynamic command, EXECUTE does. But
> if I EXECUTE a select query, how do I get
> the select result from it?
>
> Many thanks,
>
> Wei Wang
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 9: the planner will ignore your desire to choose an index scan if your
>       joining column's datatypes do not match


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