Re: Custom sort

From: Bill Moran <wmoran(at)collaborativefusion(dot)com>
To: Artacus <artacus(at)comcast(dot)net>
Cc: PostgreSQL <pgsql-general(at)postgresql(dot)org>
Subject: Re: Custom sort
Date: 2008-08-14 17:38:06
Message-ID: 20080814133806.d80e6f3b.wmoran@collaborativefusion.com
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In response to Artacus <artacus(at)comcast(dot)net>:

> Can you define a custom sort in postgres? For instance in mysql, you
> could do something like (I forget the exact syntax)
>
> ORDER BY FIND_IN_SET(column_name, ('one','two','three'))

You could do this by defining an ENUM for the values. ENUMs sort in
the order the values were defined.

You could also define a pgsql function that did the sort for you, if
ENUMs didn't cut it. i.e.:
SELECT sort_col FROM some_table ORDER BY my_sort_func(sort_col);

--
Bill Moran
Collaborative Fusion Inc.
http://people.collaborativefusion.com/~wmoran/

wmoran(at)collaborativefusion(dot)com
Phone: 412-422-3463x4023

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