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From: Anibal David Acosta <aa@devshock.com>
To: pgsql-performance@postgresql.org
Subject: Do cast affects index usage?
Date: Fri, 12 Oct 2012 17:05:52 -0300
Message-ID: <004301cda8b4$fdc57bd0$f9507370$@devshock.com> (raw)

I have a table with a column of type timestamp with time zone, this column
has an index

 

If I do a select like this

 

select * from mytable where cast(my_date as timestamp without time zone) >
'2012-10-12 20:00:00'

 

this query will use the index over the my_date column?

 

Thanks

 

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