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Message Posted: Mon, 16 Jul 2007 @ 16:47:13 GMT
Just explain it:
EXPLAIN SELECT * FROM sys_calendar.calendar WHERE calendar_date = 3908-07-16; 1) First, we do a single-AMP RETRIEVE step from SYS_CALENDAR.CALDATES by way of the unique primary index "SYS_CALENDAR.CALDATES.cdate = 3885" with no residual conditions. The estimated time for this step is 0.01 seconds.
Btw, neither "col1 = '2007-07-16'" nor "col1 = 1070716" are the recommended way to supply a date, the first one might fail, if the col1 format changes and the second one is hard to understand.
The correct one is "col1 = DATE '2007-07-16'", because it's always expecting an international standard date 'YYYY-MM-DD' regardless of the column format.
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