From: Josh Berkus <josh@agliodbs.com>
To: Wilhelm Graiss <Wilhelm.Graiss@bal.bmlfuw.gv.at>
To: 'pgsql-sql@postgresql.org' <pgsql-sql@postgresql.org>
Subject: Re: plpgsql related question: intervals and variables
Date: Tue, 21 Oct 2003 11:43:02 -0700
Message-ID: <200310211143.02533.josh@agliodbs.com> (raw)
In-Reply-To: <40925A3BA1EBD711A35C000102B6E57D06C9A7@BAL_PROXY00>
References: <40925A3BA1EBD711A35C000102B6E57D06C9A7@BAL_PROXY00>
Willhelm,
> Begin
>
> heute := ''today'';
> Select Into vk ourcolumn From table where other = foo;
> If vk > 0 Then
> vk_txt := ''Vorkuehlung notwendig'';
> ez := heute + interval ''vk days'';
PL/pgSQL handles variable like SQL, not like PHP or Perl. You can't do a
variable substitution inside quotes, and you need to cast:
ez := heute + interval (cast(vk as text) || '' days'');
Also, the string 'today' has no special meaning in PL/pgSQL. I think you want
now() instead.
I'm afraid that you're going to need a tutorial on SQL datatypes, casting, and
similar issues ... I wish I had one to recommend to you. Just keep in mind
that SQL scripting languages (like PL/pgSQL) are not Perl!
--
-Josh Berkus
Aglio Database Solutions
San Francisco
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To: pgsql-sql@postgresql.org
Cc: josh@agliodbs.com, Wilhelm.Graiss@bal.bmlfuw.gv.at
Subject: Re: plpgsql related question: intervals and variables
In-Reply-To: <200310211143.02533.josh@agliodbs.com>
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