How to Improve Materialized View Refresh & Query Performance ?

From: <krislioe_at_gmail.com>
Date: Thu, 28 Feb 2008 02:55:38 -0800 (PST)
Message-ID: <84c1efed-57c3-4285-85d8-5df7fe0dbd40@u69g2000hse.googlegroups.com>

Hi all,

I have a materialized view as follow :

CREATE MATERIALIZED VIEW MV_TRANS_STOCK
PARALLEL
BUILD IMMEDIATE
REFRESH FAST ON COMMIT
AS
SELECT SRH.SR_NO DOC_NO, SRH.SR_DATE DOC_DATE, SRH.REGS_CODE DOC_TYPE,

SRD.PRODUCT, SRH.WH_CODE, SRD.RACK, SRD.BATCH, SRD.EXP_DATE,
SRH.LOC_CODE,
SRD.QTY,
SRH.ROWID HRID, SRD.ROWID DRID, CON.ROWID CRID, 1 AS TRTYPE

FROM SALESRETURN_D SRD , SALESRETURN_H SRH, MV_CONVERT_UOM CON WHERE SRH.SR_ID = SRD.SR_ID_HDR AND
CON.PRODUCT = SRD.PRODUCT
UNION ALL
SELECT
INVH.INV_NO DOC_NO, INVH.INV_DATE DOC_DATE, INVH.REGS_CODE AS DOC_TYPE,

INVD.PRODUCT, INVD.WH_CODE, INVD.RACK, INVD.BATCH, INVD.EXP_DATE,
INVH.LOC_CODE,
INVD.QTY,
INVH.ROWID HRID, INVD.ROWID DRID, CON.ROWID CRID, 3 AS TRTYPE

FROM INVOICE_BATCH INVD, INVOICE_H INVH, MV_CONVERT_UOM CON WHERE INVH.INV_ID = INVD.INVH_ID AND
CON.PRODUCT = INVD.PRODUCT AND
INVH.STATUS <> 'C'
UNION ALL
... AND so ON... --[I have about 15 other SELECTs ]

I have two question :

1. What index are required to improve the refresh : is it like below ??

CREATE INDEX MV_TRANS_STOCK_IDX1 ON MV_TRANS_STOCK (HRID, DRID, CRID); Will it help ??? Or I have to create 3 indexes, one for each ROWID COLUMN ? 2) what index required to improve query performance ? FYI the key columns are : PRODUCT, WH_CODE, RACK, BATCH, EXP_DATE, LOC_CODE
Is it ONE BITMAP index containing all the key colums ? OR 6 bitmap indexes for each key columns ?

Thank you for your support,
Kristanto Received on Thu Feb 28 2008 - 04:55:38 CST