Re: function expression in FROM may not refer to other relations of same query level

From: "Philippe Lang" <philippe(dot)lang(at)attiksystem(dot)ch>
To: <pgsql-sql(at)postgresql(dot)org>
Subject: Re: function expression in FROM may not refer to other relations of same query level
Date: 2004-08-11 06:41:07
Message-ID: 6C0CF58A187DA5479245E0830AF84F420803B3@poweredge.attiksystem.ch
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-sql

Hello,

> Whats wrong with just using CASE:
>
> select id, usr, code,
> case when code = 1 then 'A' else 'Z' end as line1,
> case when code = 1 then 'A' else 'Z' end as line2 from tbl;

The code I showed in my last mail was actually test code only. The logic
is more complicated, and I'm not sure it's possible to implement it with
a SELECT... CASE. What's more, the "get_lines" function already exists,
and is already used in different parts of the database. I would like, if
possible, to use it without changing it, or duplicating code.

Philippe

Browse pgsql-sql by date

  From Date Subject
Next Message Philippe Lang 2004-08-11 08:24:42 Re: function expression in FROM may not refer to other relations of same query level
Previous Message Joe Conway 2004-08-11 05:05:05 Re: Wierded error in recursive function; debugging ideas?