Tom Lane wrote:
Joseph Shraibman <[EMAIL PROTECTED]> writes:

No, pkey is not the primary key in this case. The number of entries in u that have pkey 260 and not boolfield is 344706.


... and every one of those rows *must* be included in the join input,

*If* you use one big join in the first place. If postgres ran the query to first get the values with status == 3 from u, then ran the query to get the entries from d, then combined them, the result would be the same but the output faster. Instead it is doing seq scans on both tables and doing an expensive join that returns only a few rows.



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