Re: How to Improve Materialized View Refresh & Query Performance ?

<krislioe_at_gmail.com> schreef in bericht news:84c1efed-57c3-4285-85d8-5df7fe0dbd40_at_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
>

All rowids are in the SAME column.....

Shakespeare Received on Thu Feb 28 2008 - 07:35:50 CST