Re: Unexpected query plan results

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Robert Haas wrote:

On Mon, Jun 1, 2009 at 2:14 PM, Anne Rosset <arosset@xxxxxxxxxx> wrote:
The table has 468173 rows and the value for default_statistics_target is
750.
Anne
Hi Robert,
we did a vacuum analyze and the results are the same.
Here are the results of the queries :

SELECT SUM(1) FROM item WHERE is_deleted = 'f'; sum --------- 1824592 (1
row)
SELECT SUM(1) FROM item WHERE folder_id = 'tracker3641
</sf/sfmain/do/go/tracker3641?returnUrlKey=1243878161701>'; sum --------
122412 (1 row)
SELECT SUM(1) FROM item WHERE folder_id = 'tracker3641
</sf/sfmain/do/go/tracker3641?returnUrlKey=1243878161701>' AND is_deleted =
'f'; sum ----- 71 (1 row)
SELECT SUM(1) FROM item WHERE folder_id = 'tracker3641
</sf/sfmain/do/go/tracker3641?returnUrlKey=1243878161701>' AND is_deleted =
't'; sum -------- 122341 (1 row)

Something's not right here.  If the whole table has only 468173 rows,
you can't have 1.8 million deleted rows where is_deleted = false.

...Robert
The item table has 2324829 rows
The artifact table has 468173 rows.
Thanks,
Anne

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