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List:       postgresql-sql
Subject:    Re: [SQL] Date Index
From:       Tom Lane <tgl () sss ! pgh ! pa ! us>
Date:       2012-11-05 15:13:29
Message-ID: 26989.1352128409 () sss ! pgh ! pa ! us
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Adam  Tauno Williams <awilliam@whitemice.org> writes:
> OGo=> create index job_date_only on job(extract(date from start_date at
> time zone 'utc'));
> ERROR:  timestamp units "date" not recognized

There's no field called "date" in a timestamp.  I think what you're
trying to achieve is "date_trunc('day', start_date at time zone 'utc')"

http://www.postgresql.org/docs/9.2/static/functions-datetime.html#FUNCTIONS-DATETIME-EXTRACT

			regards, tom lane


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