From: Paul Lambert <paul.lambert@autoledgers.com.au>
To: pgsql-sql <pgsql-sql@postgresql.org>
Subject: Re: Select into with dynamic criteria in a plpgsql function
Date: Mon, 29 Oct 2007 08:19:55 +0900
Message-ID: <4725191B.5030209@autoledgers.com.au> (raw)
In-Reply-To: <47251704.7050508@autoledgers.com.au>
References: <47251704.7050508@autoledgers.com.au>
Paul Lambert wrote:
> I've got a function defined in PL/PgSQL to update some fields in a
> record where the criteria for pulling out some other values from a table
> is dynamic.
>
> I define a string called account_criteria to which I assign a normal SQL
> WHERE clause based on some work done earlier in the function. I then
> need to pull out some values from a table based on that where clause so
> I'm doing something like:
>
> SELECT amt_ytd INTO yesterday_amt_ytd FROM finbalance WHERE
> account_criteria;
>
> Which returns the following:
>
> ERROR: argument of WHERE must be type boolean, not type text
> SQL state: 42804
> Context: SQL statement "SELECT amt_ytd FROM finbalance WHERE $1 "
> PL/pgSQL function "fn_update_daily_balance" line 27 at SQL statement
>
> I assume I would need something like EXECUTE to do this... but SELECT
> INTO is not supported in EXECUTE so I have a bit of a conundrum. :(
>
> Can anyone offer some suggestion(s) on how can I make my function
> behave? Non-violent suggestions would be preferable.
>
Ignore this - I didn't notice execute <blah> into <variable> - I've just
re-read the manual and worked it out.
Thanks.
--
Paul Lambert
Database Administrator
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To: pgsql-sql@postgresql.org
Cc: paul.lambert@autoledgers.com.au
Subject: Re: Select into with dynamic criteria in a plpgsql function
In-Reply-To: <4725191B.5030209@autoledgers.com.au>
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