From: | Andre Schubert <andre(dot)schubert(at)km3(dot)de> |
---|---|
To: | pgsql-sql(at)postgresql(dot)org |
Subject: | Use of indexes |
Date: | 2002-04-26 07:09:53 |
Message-ID: | 3CC8FD41.DDE7B82E@km3.de |
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Thread: | |
Lists: | pgsql-sql |
Hi all,
i have a litte problem using indexes with datatypes int and int8.
i have a table
test:
id1 int,
id2 int8
if have to indexes:
index_test_1:
--------+---------
id1 | integer
btree
index_test_2:
--------+--------
id2 | bigint
btree
If i do any explains i got the following:
db_nmkm3=# explain select * from test where id1=1;
Index Scan using index_test_1 on test (cost=0.00..3.01 rows=1 width=12)
db_nmkm3=# explain select * from test where id2=1;
Seq Scan on test (cost=0.00..20.55 rows=1 width=12)
db_nmkm3=# explain select * from test where id2=1::int8;
Index Scan using index_test_2 on test (cost=0.00..3.01 rows=1 width=12)
Can somebody explain me whats wrong with me or my indexes?
thanks in advance
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