I have a table with 600million rows. I want to create a materialized view that filters it down to 50 million records but also uses
REFRESH FAST ON COMMIT. To use
REFRESH FAST I need a
MATERIALIZED VIEW LOG on the base table.
I’m looking at how to create one and I see that I can do:
create materialized view log on t create materialized view log on t WITH PRIMARY KEY ; create materialized view log on t WITH ROWID ; create materialized view log on t WITH ROWID, PRIMARY KEY ; create materialized view log on t WITH SEQUENCE ; create materialized view log on t WITH (column)
I don’t see or understand the benefits or cons of this various options
This is what I’m thinking of creating:
CREATE MATERIALIZED VIEW LOG ON LLATTRDATA WITH PRIMARY KEY CREATE MATERIALIZED VIEW MV_LLATTRDATA_TEST1 NOLOGGING CACHE BUILD IMMEDIATE REFRESH FAST ON COMMIT AS SELECT * FROM LLATTRDATA D WHERE (D.DEFID = 3070056 AND D.ATTRID IN (2, 3, 4)) OR (D.DEFID = 3070055 AND D.ATTRID IN (3, 30, 31, 2, 24, 23, 4)) OR (D.DEFID = 3071379 AND D.ATTRID IN (3, 5, 8)) OR (D.DEFID = 3072256 AND D.ATTRID = 5); BEGIN DBMS_STATS.gather_table_stats( ownname => 'me', tabname => 'MV_LLATTRDATA_TEST1'); END;
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