Re: Computed table name in function

From: Richard Huxton <dev(at)archonet(dot)com>
To: Ray Madigan <ray(at)madigans(dot)org>
Cc: Pgsql-Sql <pgsql-sql(at)postgresql(dot)org>
Subject: Re: Computed table name in function
Date: 2007-10-10 18:52:04
Message-ID: 470D1F54.6090200@archonet.com
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Ray Madigan wrote:
> I thought that the documentation said I couldn't use EXECUTE on a SELECT
> INTO?

"37.6.5. Executing Dynamic Commands

Oftentimes you will want to generate dynamic commands inside your
PL/pgSQL functions, that is, commands that will involve different tables
or different data types each time they are executed. PL/pgSQL's normal
attempts to cache plans for commands will not work in such scenarios. To
handle this sort of problem, the EXECUTE statement is provided:

EXECUTE command-string [ INTO [STRICT] target ];

where command-string is an expression yielding a string (of type text)
containing the command to be executed and target is a record variable,
row variable, or a comma-separated list of simple variables and
record/row fields.
"

There's also a FOR..IN EXECUTE loop too

--
Richard Huxton
Archonet Ltd

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