Re: Index Usage Question
От | scott.marlowe |
---|---|
Тема | Re: Index Usage Question |
Дата | |
Msg-id | Pine.LNX.4.33.0310270740220.14359-100000@css120.ihs.com обсуждение исходный текст |
Ответ на | Index Usage Question ("Staff, Alexander" <alexander.staff@sap.com>) |
Список | pgsql-general |
On Fri, 24 Oct 2003, Staff, Alexander wrote: > Hi, > I created a simple table (name char200, zip char10, city char200, street char200, id int) and filled some data, appr. 250000 records, in it. > I tested accessing some rows (select id from address where id = 44444;, select * from address where id between 33333, 333444)with an unique index on id and without an index. EXPLAIN tells me in both cases that it does NOT use the index. > I tested this with using the name column (select name from address where name like 'Wal%';, select name from address wherename = 'Walz') and if I created an index on name it uses it. > Using id in the where clause of the select is as slow as using an unindexed name in the where-clause. > I ran ANALYZE, no changes. > What's this ? > This is not a feature, is it ? Can we see the output of explain analyze select...(your query here)???
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