Performance improvement in mtl material transactions query

Question

Hello All,
We have some millions of records in mtl_material_transactions and we need to extract some transactions based on particular OU(currently 1 OU) and some filtering condition. This program will run every 5 min in the prod environment so there would be minimal records (1 to 50) which are eligible to be picked up in each run. Currently the below query is taking 2 to 4 min depending on the server load. Even there are no eligible records for pickup then also it is running 2 to 4 min. If there are any improvement points please suggest us.
Below is the query details and explain plan
WITH mtst AS
SELECT mtt.transaction_source_type_id, mtt.transaction_type_id,
mtt.transaction_action_id
FROM mtl_transaction_types mtt
WHERE EXISTS (
SELECT 1
FROM apps.sga_denpyo_comm_maint sdcm
WHERE sdcm.unso_event = 'M'
AND sdcm.unso_extract = 'Y'
AND mtt.transaction_type_id = sdcm.mtl_type_id)
AND mtt.transaction_source_type_id '2'),
mp AS
(SELECT organization_id
FROM mtl_parameters
WHERE master_organization_id = 1773)
SELECT mt.transaction_id, NVL (mt.attribute3, '00') attribute3
FROM mtl_material_transactions mt, mtst, mp
WHERE mt.transaction_source_type_id = mtst.transaction_source_type_id
AND mt.transaction_type_id = mtst.transaction_type_id
AND mt.transaction_action_id = mtst.transaction_action_id
AND mt.transaction_date > '01-JAN-2000'
AND mt.organization_id = mp.organization_id
AND SUBSTR (NVL (mt.attribute3, '00'), 1, 1) = '0'
AND mt.transaction_quantity < 0
AND NVL (mt.transaction_reference, 'XXX') NOT LIKE 'NO%'
AND NVL (mt.transaction_reference, 'YYY') NOT LIKE 'KR%'
AND NVL (mt.transaction_reference, 'ZZZ') NOT LIKE 'UNSO_CANCEL%'
ORDER BY mt.transaction_id
Operation Object Name Rows Bytes Cost Object Node In/Out PStart PStop
SELECT STATEMENT Optimizer Mode=CHOOSE 1 162
SORT ORDER BY 1 73 162
FILTER
TABLE ACCESS BY INDEX ROWID INV.MTL_MATERIAL_TRANSACTIONS 1 43 51
NESTED LOOPS 1 73 116
MERGE JOIN CARTESIAN 1 30 65
NESTED LOOPS 1 22 59
SORT UNIQUE
TABLE ACCESS FULL SGA.SGA_DENPYO_COMM_MAINT_ALL 1 11 11
TABLE ACCESS BY INDEX ROWID INV.MTL_TRANSACTION_TYPES 1 11 1
INDEX UNIQUE SCAN INV.MTL_TRANSACTION_TYPES_U1 1
BUFFER SORT 33 264 64
TABLE ACCESS FULL INV.MTL_PARAMETERS 33 264 6
INDEX RANGE SCAN INV.MTL_MATERIAL_TRANSACTIONS_N9 202 4

Answer 1

Kindly avoid using Where, Rather use Where exists. Also Create an index that will be helpful in increasing performance significantly.