--- Mike Mascari <[EMAIL PROTECTED]> escribió: > Tom Lane wrote: > > Mike Mascari <[EMAIL PROTECTED]> writes: > > > >>When I query the view with a simple filter, I get: > > > > > >>explain analyze select * from p_areas where > deactive is null; > > > > > > The problem seems to be here: > > > > > >> -> Seq Scan on _areas a (cost=0.00..2.48 > rows=1 width=163) (actual time=0.037..0.804 rows=48 > loops=1) > >> Filter: (deactive IS NULL) > > > > > > Why is it so completely off about the selectivity > of the IS NULL clause?
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null values are not indexable, is that your question? If it is your question then create a partial index with where deactive is null. regards, Jaime Casanova _________________________________________________________ Do You Yahoo!? Información de Estados Unidos y América Latina, en Yahoo! Noticias. Visítanos en http://noticias.espanol.yahoo.com ---------------------------(end of broadcast)--------------------------- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
