Re: Index help
- From: "Terry Sutton" <terrysutton@xxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Fri, 23 Jul 2004 15:12:51 -0700
OK, we've established that I wasn't awake enough to notice there were 29
executions, but I'm still confused about the "primary key" thing. You say
ida3a5 is the primary key. That means you have an index on it. Unless I'm
still reading wrong, your query has a "(A0.idA3A5 = :1)" predicate. Seems
to me that would indicate 1 index lookup and 1 row lookup. As Daniel points
out, most of your executions return no rows, so the other predicates aren't
satisfied. But I don't see how you would ever get a full scan instead of a
primary key lookup.
--Terry
----- Original Message -----
I may be blind (no coffee yet), but you're doing a select with the primary
key in the where clause and you get 4 rows? Something's wrong here.
--Terry
----- Original Message -----
From: "M.Godlewski" <mcgodlewski@xxxxxxxxx>
To: <oracle-l@xxxxxxxxxxxxx>
Sent: Friday, July 23, 2004 8:43 AM
Subject: RE: Index help
row count for table 5108
primary key on table (ida3a5) has 5108 distinct_keys
codec5 has 3 distinct values.
scheduletime has 4781 distinct values.
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