8.1.6 materialized view rowid vs. primary key?

From: <babypuke_at_my-deja.com>
Date: Wed, 27 Dec 2000 19:56:23 GMT
Message-ID: <92dhh4$pj9$1@nnrp1.deja.com>

oracle 8.1.6 on solaris. the problem is this:

i have a materialized view that has refresh_method = rowid. when i issue a query that contains that snapshot (and other tables joined to it), explain plan shows a merge join cartesian and full table scan on the snapshot, even tho it should be able to do index scans. i recreated the snapshot exactly the same way, except refresh method = primary key, and voila, the query plan was what i expected. is there a reason for this? all the indexes were the same for both tables (including an intermedia full-text index).

i'm not talking about the underlying query that defines the snapshot, i'm talking about queries that involve the snapshot.

thanks in advance for any info.

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http://www.deja.com/ Received on Wed Dec 27 2000 - 13:56:23 CST