From: Ying Lu <ying_lu@cs.concordia.ca>
To: Michael Fuhr <mike@fuhr.org>
Cc: pgsql-sql@postgresql.org
Subject: Re: Index creation question for expression (col1 || '-' ||
Date: Fri, 08 Jul 2005 13:08:53 -0400
Message-ID: <42CEB325.90906@cs.concordia.ca> (raw)
In-Reply-To: <20050708163215.GA81846@winnie.fuhr.org>
References: <42CEA509.3090507@cs.concordia.ca>
<20050708163215.GA81846@winnie.fuhr.org>
>On Fri, Jul 08, 2005 at 12:08:41PM -0400, Ying Lu wrote:
>
>
>>CREATE INDEX idx_t1 ON test (col1 || '-' || col2);
>>
>>May I know is it possible and how I may create index for the expression
>>such as "col1 || '-' || col2" for a table please?
>>
>>
>
>
>"The syntax of the CREATE INDEX command normally requires writing
>parentheses around index expressions, as shown in the second
>example...."
>
>That second example is exactly what you're trying to do:
>
>CREATE INDEX people_names ON people ((first_name || ' ' || last_name));
>
>
This is exactly what I want. I missed a pair of "()" :( . That is why I
got an error.
Thank you very much.
- Emi
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-sql@postgresql.org
Cc: ying_lu@cs.concordia.ca, mike@fuhr.org
Subject: Re: Index creation question for expression (col1 || '-' ||
In-Reply-To: <42CEB325.90906@cs.concordia.ca>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox