Tom Lane wrote:
"Joshua D. Drake" <[EMAIL PROTECTED]> writes:
Assume the following:
index on: (id, adate)
constraint CHECK(adate > '01-01-2007' AND adate < '04-01-2007');


The planner will not use the index listed above.

For what?

select adate from parent where adate = '01-25-2007'

For example.

Joshua D. Drake




                        regards, tom lane

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TIP 9: In versions below 8.0, the planner will ignore your desire to
       choose an index scan if your joining column's datatypes do not
       match



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