Date: Sat, 22 Sep 2012 10:08:17 +0200
From: Andreas Kretschmer <akretschmer@spamfence.net>
To: pgsql-sql@postgresql.org
Subject: Re: matching a timestamp field
Message-ID: <20120922080817.GA2943@tux>
References: <3C56CD7AD881324BB4C60AA5CE2C5CC11720019A@A04059.BGC.NET>
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BACHELART PIERRE (CIS/SCC) <pierre.bachelart@belgacom.be> wrote:

> Hello,
> 
>  
> 
>  
> 
> Why is my sql below accepted in 8.1.19 and refused in 8.4.9 ???
> 
> Welcome to psql 8.1.19, the PostgreSQL interactive terminal.
> 
> ansroc=# select * from s12hwdb where record ~'2012-09-20' limit 5;
>  
> 
> psql (8.4.9)
> 
> 
> ERROR:  operator does not exist: timestamp without time zone ~ unknown
> 
> LINE 1: select * from s12hwdb where record ~'2012-09-20' limit 5;
> 

Because of the dropped implicid casts since IIRC 8.2.

You have to rewrite your query to:

select * from s12hwdb where record::date = '2012-09-20'::date limit 5;

(assuming record is a TIMESTAMP-Field)

Short example:

test=# select now() ~ '2012-09-22';
ERROR:  operator does not exist: timestamp with time zone ~ unknown
LINE 1: select now() ~ '2012-09-22';
                     ^
HINT:  No operator matches the given name and argument type(s). You might need to add explicit type casts.
Time: 0,156 ms
test=!# rollback;
ROLLBACK
Time: 0,079 ms
test=# select now()::date = '2012-09-22'::date;
 ?column?
----------
 t
(1 row)


Andreas
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