I build a table to test the theory that PGSQL wouldn't use an index to
satisfy 'SELECT * FROM table WHERE field IS NOT NULL'. Sure enough it
wasn't using the index, but it seems that's because there's no stats to
be had. What am I doing wrong? This is version 7.3.4.
stats=# \t
Showing only tuples.
stats=# select * from pg_stats where tablename='t';
stats=# analyze t;
ANALYZE
stats=# select * from pg_stats where tablename='t';
stats=# select count(*) from pg_stats where tablename='email_contrib';
5
stats=# \t
Tuples only is off.
stats=# select relname, relpages, reltuples from pg_class where relname ='moo' or relname='t';
relname | relpages | reltuples
---------+----------+-----------
moo | 289 | 131073
t | 32769 | 131076
(2 rows)
stats=# \d t
Table "public.t"
Column | Type | Modifiers
--------+-----------------+-------------
i | integer |
c | character(1950) | default 'x'
Indexes: moo btree (i)
stats=#
--
Jim C. Nasby, Database Consultant jim@nasby.net
Member: Triangle Fraternity, Sports Car Club of America
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