Need to use Hint for Select Query 11g
Hi,
I have a select query which is fetching data from multiple table.
I just need 10 or less rows, already I m using rownum <=10
Could you tell which is the better choice for using HINT.
/*+ FIRST_ROWS(10) */ (or) /*+ all_rows */
Thanks.
On Oracle 11.2.0.3 and 11.1.0.7 on my test table with an ORDER BY in the query, I found FIRST_ROWS using the index to get sorted rows and ALL_ROWS retrieving 10 rows from a full scan and then sorting them.
On Oracle I didn't find any difference in plan on a different, physically smaller, table.
For the ALL_ROWS version the optimiser already knows that there will only be 10 rows returned.
The performance difference: As usual, only use FIRST_ROWS if you actually intend to fetch less than the full data set. If you intend to fetch all 10 rows, use ALL_ROWS, which should be the default (taken from the optimizer_mode system parameter).
Similar Messages
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Need some help with the Select query.
Need some help with the Select query.
I had created a Z table with the following fields :
ZADS :
MANDT
VKORG
ABGRU.
I had written a select query as below :
select single vkorg abgru from ZADS into it_rej.
IT_REJ is a Work area:
DATA : BEGIN OF IT_REJ,
VKORG TYPE VBAK-VKORG,
ABGRU TYPE VBAP-ABGRU,
END OF IT_REJ.
This is causing performance issue. They are asking me to include the where condition for this select query.
What should be my select query here?
Please suggest....
Any suggestion will be apprecaiated!
Regards,
DeveloperHello Everybody!
Thank you for all your response!
I had changes this work area into Internal table and changed the select query. PLease let me know if this causes any performance issues?
I had created a Z table with the following fields :
ZADS :
MANDT
VKORG
ABGRU.
I had written a select query as below :
I had removed the select single and insted of using the Structure it_rej, I had changed it into Internal table
select vkorg abgru from ZADS into it_rej.
Earlier :
IT_REJ is a Work area:
DATA : BEGIN OF IT_REJ,
VKORG TYPE VBAK-VKORG,
ABGRU TYPE VBAP-ABGRU,
END OF IT_REJ.
Now :
DATA : BEGIN OF IT_REJ occurs 0,
VKORG TYPE VBAK-VKORG,
ABGRU TYPE VBAP-ABGRU,
END OF IT_REJ.
I guess this will fix the issue correct?
PLease suggest!
Regards,
Developer. -
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How to assign search help using ovs for select options for ALV in web dynpr
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Hi,
refer http://wiki.sdn.sap.com/wiki/display/WDABAP/InputhelpofObjectValueSelectioninWDABAP
http://www.****************/Tutorials/WebDynproABAP/OVS/page1.htm
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How to use offset for select-option parameter ?
Hi experts
could anybody please let me know how to use offset for select-option parameter. i can able to use offset for table fields, variabiles and all , but don't know how to use for parameters.
following is my code
SELECT-OPTIONS: s_prctr FOR vbsegs-prctr OBLIGATORY.
here "prctr" length is 10.
i'm using two tables 1. vbsegd-bupla
2. vbsegs-prctr
here prctr+6(4) = bupla.
"Bupla" length is 4
SELECT belnr gjahr bukrs bupla sgtxt buzei FROM vbsegd INTO CORRESPONDING FIELDS OF TABLE it_vbsegd FOR ALL ENTRIES IN it_vbkpf
WHERE belnr = it_vbkpf-belnr
AND gjahr = it_vbkpf-gjahr
AND bukrs = it_vbkpf-bukrs
AND bupla IN s_prctr.
the above statement is not working as prctr and bupla lenths are different. here i want to use offset.
SELECT belnr gjahr bukrs prctr sgtxt buzei FROM vbsegs INTO CORRESPONDING FIELDS OF TABLE it_vbsegs FOR ALL ENTRIES IN it_vbkpf
WHERE belnr = it_vbkpf-belnr
AND gjahr = it_vbkpf-gjahr
AND bukrs = it_vbkpf-bukrs
AND prctr IN s_prctr.
this is working as prctr and s_prctr lengths are equal.
could anybody please help me out in this.
Thanks in advance.
regards
satishBelow code will work for you.
SELECT-OPTIONS: s_prctr FOR vbsegs-prctr OBLIGATORY.
RANGES: s_bupla FOR vbsegd-bupla.
s_bupla[] = s_prctr[].
DELETE ADJACENT DUPLICATES FROM s_bupla.
SELECT belnr gjahr bukrs bupla sgtxt buzei FROM vbsegd INTO CORRESPONDING FIELDS OF TABLE it_vbsegd FOR ALL ENTRIES IN it_vbkpf
WHERE belnr = it_vbkpf-belnr
AND gjahr = it_vbkpf-gjahr
AND bukrs = it_vbkpf-bukrs
AND bupla IN s_bupla. -
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(view hint or Query writing method) using views in Select Query
Need Assistance,
Hi all,
My database having many views. while i am joining the views in a select query increase the cost of the querys due to the complex joins in the conditions.
While checking the select query with views individualy taking less cost.
Does any hint or query writing method is availabe to avoid the merging of the execution plan of the views?
I have browsed many related to the mentioned issues,couldn't found any thing that helps me.
Please help me on this issue,it will be very much helpfull for me.
Thanks,
SenthurPlease read the two threads linked to in the FAQ: {message:id=9360003} and post the relevant details they request, so that people can help you better with your issue.
We cannot help if you just say "my query is slow what do I do to fix it" as we cannot see your queries, your data, or any other information we would need to help. If the answer was that simple, it would be built into oracle so that the optimiser would fix it for you. -
Parallel Query - using hints for multiple 'from' tables
Currently I am running the following (simplified) query:
INSERT /*+ APPEND */ INTO NEW_TAB (ID)
SELECT DISTINCT T1.BIG_ID
FROM BIG_TAB1 T1, BIG_TAB2 T2
WHERE T1.BIG_ID = T2.ID2
AND T2.METHOD = 1
AND T1.CODE IN ( /*16 codes here*/ );When this migrates to the production platform the DBAs have asked me to code it for parallel processing.
We implement 4 processors for parallel processing and so usually I would do the following hint between INSERT and INTO;
/*+ PARALLEL (BIG_TAB1, 4) */As my query here accesses two tables how would I modify this statement to make it run in parallel? Would it be;
INSERT /*+ PARALLEL (BIG_TAB1, 4) */ /*+ PARALLEL (BIG_TAB2, 4) */ INTO NEW_TAB (ID)
SELECT DISTINCT T1.BIG_ID?
Thanks for any help!
fakelvisAh, brilliant.
Thank you!
Also, on a related note, I'm using a query of similar size in a PL/SQL script. This big query is in a cursor and the data selected here is then inserted into another table depending on a few criteria.
For this to run on parallel, would the parallel hint be placed in the cursor's SELECT query or on the verious INSERTs within the body of the code? I'm assuming it's in the actual SELECT query of the cursor, but just thought I would check as I'm new to hints!
Thanks again! -
Getting deadlock detected while waiting for resource error for select Query.....
Hi all,
i am getting a below error whenever executing the below select query....
some times it will show dead lock detected while waiting for resource and terminated...
some times it executes and gives result..
but all the time it writes an alert to alert log
Plesae suggest how to resolve the issue..........
Thanks in advance
Env: Linux / Oracle 11.2.0.3.3
Error from alert log:
Errors in file /u01/oracle/oracle/diag/rdbms/bdrdb/bdrdb/trace/bdrdb_p017_6076.trc:
ORA-00060: deadlock detected while waiting for resource
ORA-10387: parallel query server interrupt (normal)
Trace file info... bdrdb_p017_6076.trc:
Trace file /u01/oracle/oracle/diag/rdbms/bdrdb/bdrdb/trace/bdrdb_p017_6076.trc
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
ORACLE_HOME = /u01/oracle/oracle/product/11.2.0/dbhome_1
System name: Linux
Node name: bdrdb.cteplindia.com
Release: 2.6.18-308.el5PAE
Version: #1 SMP Fri Jan 27 17:40:09 EST 2012
Machine: i686
Instance name: bdrdb
Redo thread mounted by this instance: 1
Oracle process number: 92
Unix process pid: 6076, image: [email protected] (P017)
*** 2013-11-04 23:18:57.915
*** SESSION ID:(423.59970) 2013-11-04 23:18:57.915
*** CLIENT ID:() 2013-11-04 23:18:57.915
*** SERVICE NAME:(bdrdb) 2013-11-04 23:18:57.915
*** MODULE NAME:() 2013-11-04 23:18:57.915
*** ACTION NAME:() 2013-11-04 23:18:57.915
*** 2013-11-04 23:18:57.915
DEADLOCK DETECTED ( ORA-00060 )
[Transaction Deadlock]
Deadlock graph:
---------Blocker(s)-------- ---------Waiter(s)---------
Resource Name process session holds waits process session holds waits
PS-00000001-00000011 92 423 S 33 128 S X
BF-2ed08c01-00000000 33 128 S 92 423 S X
session 423: DID 0001-005C-00081126 session 128: DID 0001-0021-00067D23
session 128: DID 0001-0021-00067D23 session 423: DID 0001-005C-00081126
DEADLOCK DETECTED ( ORA-00060 )
[Transaction Deadlock]
Deadlock graph:
---------Blocker(s)-------- ---------Waiter(s)---------
Resource Name process session holds waits process session holds waits
PS-00000001-00000011 92 423 S 33 128 S X
BF-2ed08c01-00000000 33 128 S 92 423 S X
session 423: DID 0001-005C-00081126 session 128: DID 0001-0021-00067D23
session 128: DID 0001-0021-00067D23 session 423: DID 0001-005C-00081126
Rows waited on:
Session 423: no row
Session 128: obj - rowid = 00021DC1 - AAAh3BAAVAAAQL/AAA
(dictionary objn - 138689, file - 21, block - 66303, slot - 0)
----- Information for the OTHER waiting sessions -----
Session 128:
sid: 128 ser: 46176 audsid: 1836857 user: 102/DBLOCAL
flags: (0x8000041) USR/- flags_idl: (0x1) BSY/-/-/-/-/-
flags2: (0x40009) -/-/INC
pid: 33 O/S info: user: oracle, term: UNKNOWN, ospid: 31611
image: [email protected]
client details:
O/S info: user: masked, term: masked, ospid: 5924:568
machine: masked program: Toad.exe
application name: TOAD background query session, hash value=526966934
current SQL:
application name: TOAD background query session, hash value=526966934
current SQL:
SELECT DISTINCT B_FP_TEST.TEST_ID
FROM B_FP_TEST,
B_USER_INFO,
J_FP_INVESTIGATOR,
L_TEST_STATUS,
L_ATMS_TEST_TYPE,
j_op_test_anml
WHERE B_FP_TEST.TEST_ID = J_FP_INVESTIGATOR.TEST_ID
AND B_FP_TEST.TEST_TYPE_ID = L_ATMS_TEST_TYPE.ATMS_TEST_TYPE_ID
AND B_USER_INFO.B_USER_INFO_ID = J_FP_INVESTIGATOR.INVESTIGATOR_ID
AND B_FP_TEST.STATUS_ID = L_TEST_STATUS.STATUS_ID
AND B_FP_TEST.IS_DELETED = :"SYS_B_00"
AND B_FP_TEST.TEST_NUM NOT IN (:"SYS_B_01", :"SYS_B_02", :"SYS_B_03")
AND L_ATMS_TEST_TYPE.IS_DELETED = :"SYS_B_04"
AND J_FP_INVESTIGATOR.is_pi = :"SYS_B_05"
AND L_TEST_STATUS.STATUS IN (:"SYS_B_06", :"SYS_B_07", :"SYS_B_08")
AND j_op_test_anml.test_id = B_FP_TEST.TEST_ID
----- End of information for the OTHER waiting sessions -----
*** 2013-11-04 23:18:57.916
dbkedDefDump(): Starting a non-incident diagnostic dump (flags=0x0, level=3, mask=0x0)
----- Error Stack Dump -----
ORA-00060: deadlock detected while waiting for resource
ORA-10387: parallel query server interrupt (normal)
----- SQL Statement (None) -----
Current SQL information unavailable - no cursor.
----- Call Stack Trace -----
calling call entry argument values in hex
location type point (? means dubious value)
More......
Query:
SELECT DISTINCT B_FP_TEST.TEST_ID
FROM B_FP_TEST,
B_USER_INFO,
J_FP_INVESTIGATOR,
L_TEST_STATUS,
L_ATMS_TEST_TYPE,
j_op_test_anml
WHERE B_FP_TEST.TEST_ID = J_FP_INVESTIGATOR.TEST_ID
AND B_FP_TEST.TEST_TYPE_ID = L_ATMS_TEST_TYPE.ATMS_TEST_TYPE_ID
AND B_USER_INFO.B_USER_INFO_ID = J_FP_INVESTIGATOR.INVESTIGATOR_ID
AND B_FP_TEST.STATUS_ID = L_TEST_STATUS.STATUS_ID
AND B_FP_TEST.IS_DELETED = 0
AND B_FP_TEST.TEST_NUM NOT IN (1, 2, 99)
AND L_ATMS_TEST_TYPE.IS_DELETED = 0
AND J_FP_INVESTIGATOR.is_pi = 1
AND L_TEST_STATUS.STATUS IN ('Scheduled', 'In-Progress', 'Completed')
AND j_op_test_anml.test_id = B_FP_TEST.TEST_ID
AND ( (j_op_test_anml.end_date BETWEEN TO_DATE ('28-Oct-2013') - 1
AND TO_DATE ('04-Nov-2013') + 1)
OR (j_op_test_anml.start_date BETWEEN TO_DATE ('28-Oct-2013') - 1
AND TO_DATE ('04-Nov-2013') + 1)
OR (TO_DATE ('28-Oct-2013') BETWEEN j_op_test_anml.start_date
AND j_op_test_anml.end_date)
OR (TO_DATE ('04-Nov-2013') BETWEEN j_op_test_anml.start_date
AND j_op_test_anml.end_date))
AND L_ATMS_TEST_TYPE.IS_DELETED = 0
AND B_FP_TEST.DATASOURCE_ID = 9
Query Exp plan:
Plan hash value: 3398228788
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | Pstart| Pstop | TQ |IN-OUT| PQ Distrib |
| 0 | SELECT STATEMENT | | 1501 | 102K| 1929 (1)| 00:00:24 | | | | | |
| 1 | HASH UNIQUE | | 1501 | 102K| 1929 (1)| 00:00:24 | | | | | |
| 2 | CONCATENATION | | | | | | | | | | |
| 3 | PX COORDINATOR | | | | | | | | | | |
| 4 | PX SEND QC (RANDOM) | :TQ30005 | 241 | 16870 | 800 (1)| 00:00:10 | | | Q3,05 | P->S | QC (RAND) |
|* 5 | HASH JOIN | | 241 | 16870 | 800 (1)| 00:00:10 | | | Q3,05 | PCWP | |
| 6 | PX RECEIVE | | 246 | 15990 | 797 (1)| 00:00:10 | | | Q3,05 | PCWP | |
| 7 | PX SEND HASH | :TQ30004 | 246 | 15990 | 797 (1)| 00:00:10 | | | Q3,04 | P->P | HASH |
|* 8 | HASH JOIN | | 246 | 15990 | 797 (1)| 00:00:10 | | | Q3,04 | PCWP | |
| 9 | PX RECEIVE | | 573 | 29223 | 793 (1)| 00:00:10 | | | Q3,04 | PCWP | |
| 10 | PX SEND HASH | :TQ30003 | 573 | 29223 | 793 (1)| 00:00:10 | | | Q3,03 | P->P | HASH |
|* 11 | HASH JOIN | | 573 | 29223 | 793 (1)| 00:00:10 | | | Q3,03 | PCWP | |
| 12 | BUFFER SORT | | | | | | | | Q3,03 | PCWC | |
| 13 | PX RECEIVE | | | | | | | | Q3,03 | PCWP | |
| 14 | PX SEND BROADCAST | :TQ30000 | | | | | | | | S->P | BROADCAST |
| 15 | NESTED LOOPS | | | | | | | | | | |
| 16 | NESTED LOOPS | | 485 | 20855 | 781 (0)| 00:00:10 | | | | | |
| 17 | TABLE ACCESS BY GLOBAL INDEX ROWID| J_OP_TEST_ANML | 485 | 10185 | 296 (0)| 00:00:04 | ROWID | ROWID | | | |
|* 18 | INDEX RANGE SCAN | IDX$$_2D190001 | 485 | | 4 (0)| 00:00:01 | | | | | |
|* 19 | INDEX UNIQUE SCAN | FT_TEST_ID_PK | 1 | | 0 (0)| 00:00:01 | | | | | |
|* 20 | TABLE ACCESS BY GLOBAL INDEX ROWID | B_FP_TEST | 1 | 22 | 1 (0)| 00:00:01 | ROWID | ROWID | | | |
| 21 | PX BLOCK ITERATOR | | 70382 | 549K| 11 (0)| 00:00:01 | | | Q3,03 | PCWC | |
|* 22 | TABLE ACCESS FULL | J_FP_INVESTIGATOR | 70382 | 549K| 11 (0)| 00:00:01 | | | Q3,03 | PCWP | |
| 23 | BUFFER SORT | | | | | | | | Q3,04 | PCWC | |
| 24 | PX RECEIVE | | 3 | 42 | 3 (0)| 00:00:01 | | | Q3,04 | PCWP | |
| 25 | PX SEND HASH | :TQ30001 | 3 | 42 | 3 (0)| 00:00:01 | | | | S->P | HASH |
|* 26 | TABLE ACCESS FULL | L_TEST_STATUS | 3 | 42 | 3 (0)| 00:00:01 | | | | | |
| 27 | BUFFER SORT | | | | | | | | Q3,05 | PCWC | |
| 28 | PX RECEIVE | | 30 | 150 | 3 (0)| 00:00:01 | | | Q3,05 | PCWP | |
| 29 | PX SEND HASH | :TQ30002 | 30 | 150 | 3 (0)| 00:00:01 | | | | S->P | HASH |
|* 30 | TABLE ACCESS FULL | L_ATMS_TEST_TYPE | 30 | 150 | 3 (0)| 00:00:01 | | | | | |
| 31 | NESTED LOOPS | | | | | | | | | | |
| 32 | NESTED LOOPS | | 3 | 210 | 329 (1)| 00:00:04 | | | | | |
| 33 | NESTED LOOPS | | 3 | 195 | 329 (1)| 00:00:04 | | | | | |
|* 34 | HASH JOIN | | 2 | 114 | 325 (1)| 00:00:04 | | | | | |
| 35 | NESTED LOOPS | | | | | | | | | | |
| 36 | NESTED LOOPS | | 6 | 258 | 322 (1)| 00:00:04 | | | | | |
| 37 | PARTITION RANGE SINGLE | | 6 | 126 | 316 (1)| 00:00:04 | 7 | 7 | | | |
|* 38 | TABLE ACCESS FULL | J_OP_TEST_ANML | 6 | 126 | 316 (1)| 00:00:04 | 7 | 7 | | | |
|* 39 | INDEX UNIQUE SCAN | FT_TEST_ID_PK | 1 | | 0 (0)| 00:00:01 | | | | | |
|* 40 | TABLE ACCESS BY GLOBAL INDEX ROWID | B_FP_TEST | 1 | 22 | 1 (0)| 00:00:01 | ROWID | ROWID | | | |
|* 41 | TABLE ACCESS FULL | L_TEST_STATUS | 3 | 42 | 3 (0)| 00:00:01 | | | | | |
|* 42 | TABLE ACCESS BY INDEX ROWID | J_FP_INVESTIGATOR | 1 | 8 | 2 (0)| 00:00:01 | | | | | |
|* 43 | INDEX RANGE SCAN | FI_TEST_ID_PK | 1 | | 1 (0)| 00:00:01 | | | | | |
|* 44 | INDEX UNIQUE SCAN | L_ATMS_TEST_TYPE_PK | 1 | | 0 (0)| 00:00:01 | | | | | |
|* 45 | TABLE ACCESS BY INDEX ROWID | L_ATMS_TEST_TYPE | 1 | 5 | 1 (0)| 00:00:01 | | | | | |
| 46 | PX COORDINATOR | | | | | | | | | | |
| 47 | PX SEND QC (RANDOM) | :TQ20003 | | | | | | | Q2,03 | P->S | QC (RAND) |
| 48 | NESTED LOOPS | | | | | | | | Q2,03 | PCWP | |
| 49 | NESTED LOOPS | | 33 | 2310 | 399 (2)| 00:00:05 | | | Q2,03 | PCWP | |
|* 50 | HASH JOIN | | 33 | 2145 | 397 (2)| 00:00:05 | | | Q2,03 | PCWP | |
| 51 | PX RECEIVE | | 78 | 3978 | 393 (1)| 00:00:05 | | | Q2,03 | PCWP | |
| 52 | PX SEND HASH | :TQ20002 | 78 | 3978 | 393 (1)| 00:00:05 | | | Q2,02 | P->P | HASH |
|* 53 | HASH JOIN | | 78 | 3978 | 393 (1)| 00:00:05 | | | Q2,02 | PCWP | |
| 54 | BUFFER SORT | | | | | | | | Q2,02 | PCWC | |
| 55 | PX RECEIVE | | | | | | | | Q2,02 | PCWP | |
| 56 | PX SEND BROADCAST | :TQ20000 | | | | | | | | S->P | BROADCAST |
| 57 | NESTED LOOPS | | | | | | | | | | |
| 58 | NESTED LOOPS | | 66 | 2838 | 382 (1)| 00:00:05 | | | | | |
| 59 | PARTITION RANGE SINGLE | | 66 | 1386 | 316 (1)| 00:00:04 | 7 | 7 | | | |
|* 60 | TABLE ACCESS FULL | J_OP_TEST_ANML | 66 | 1386 | 316 (1)| 00:00:04 | 7 | 7 | | | |
|* 61 | INDEX UNIQUE SCAN | FT_TEST_ID_PK | 1 | | 0 (0)| 00:00:01 | | | | | |
|* 62 | TABLE ACCESS BY GLOBAL INDEX ROWID | B_FP_TEST | 1 | 22 | 1 (0)| 00:00:01 | ROWID | ROWID | | | |
| 63 | PX BLOCK ITERATOR | | 70382 | 549K| 11 (0)| 00:00:01 | | | Q2,02 | PCWC | |
|* 64 | TABLE ACCESS FULL | J_FP_INVESTIGATOR | 70382 | 549K| 11 (0)| 00:00:01 | | | Q2,02 | PCWP | |
| 65 | BUFFER SORT | | | | | | | | Q2,03 | PCWC | |
| 66 | PX RECEIVE | | 3 | 42 | 3 (0)| 00:00:01 | | | Q2,03 | PCWP | |
| 67 | PX SEND HASH | :TQ20001 | 3 | 42 | 3 (0)| 00:00:01 | | | | S->P | HASH |
|* 68 | TABLE ACCESS FULL | L_TEST_STATUS | 3 | 42 | 3 (0)| 00:00:01 | | | | | |
|* 69 | INDEX UNIQUE SCAN | L_ATMS_TEST_TYPE_PK | 1 | | 0 (0)| 00:00:01 | | | Q2,03 | PCWP | |
|* 70 | TABLE ACCESS BY INDEX ROWID | L_ATMS_TEST_TYPE | 1 | 5 | 1 (0)| 00:00:01 | | | Q2,03 | PCWP | |
| 71 | PX COORDINATOR | | | | | | | | | | |
| 72 | PX SEND QC (RANDOM) | :TQ10003 | | | | | | | Q1,03 | P->S | QC (RAND) |
| 73 | NESTED LOOPS | | | | | | | | Q1,03 | PCWP | |
| 74 | NESTED LOOPS | | 33 | 2310 | 399 (2)| 00:00:05 | | | Q1,03 | PCWP | |
|* 75 | HASH JOIN | | 34 | 2210 | 397 (2)| 00:00:05 | | | Q1,03 | PCWP | |
| 76 | PX RECEIVE | | 78 | 3978 | 393 (1)| 00:00:05 | | | Q1,03 | PCWP | |
| 77 | PX SEND HASH | :TQ10002 | 78 | 3978 | 393 (1)| 00:00:05 | | | Q1,02 | P->P | HASH |
|* 78 | HASH JOIN | | 78 | 3978 | 393 (1)| 00:00:05 | | | Q1,02 | PCWP | |
| 79 | BUFFER SORT | | | | | | | | Q1,02 | PCWC | |
| 80 | PX RECEIVE | | | | | | | | Q1,02 | PCWP | |
| 81 | PX SEND BROADCAST | :TQ10000 | | | | | | | | S->P | BROADCAST |
| 82 | NESTED LOOPS | | | | | | | | | | |
| 83 | NESTED LOOPS | | 66 | 2838 | 382 (1)| 00:00:05 | | | | | |
| 84 | PARTITION RANGE SINGLE | | 66 | 1386 | 316 (1)| 00:00:04 | 7 | 7 | | | |
|* 85 | TABLE ACCESS FULL | J_OP_TEST_ANML | 66 | 1386 | 316 (1)| 00:00:04 | 7 | 7 | | | |
|* 86 | INDEX UNIQUE SCAN | FT_TEST_ID_PK | 1 | | 0 (0)| 00:00:01 | | | | | |
|* 87 | TABLE ACCESS BY GLOBAL INDEX ROWID | B_FP_TEST | 1 | 22 | 1 (0)| 00:00:01 | ROWID | ROWID | | | |
| 88 | PX BLOCK ITERATOR | | 70382 | 549K| 11 (0)| 00:00:01 | | | Q1,02 | PCWC | |
|* 89 | TABLE ACCESS FULL | J_FP_INVESTIGATOR | 70382 | 549K| 11 (0)| 00:00:01 | | | Q1,02 | PCWP | |
| 90 | BUFFER SORT | | | | | | | | Q1,03 | PCWC | |
| 91 | PX RECEIVE | | 3 | 42 | 3 (0)| 00:00:01 | | | Q1,03 | PCWP | |
| 92 | PX SEND HASH | :TQ10001 | 3 | 42 | 3 (0)| 00:00:01 | | | | S->P | HASH |
|* 93 | TABLE ACCESS FULL | L_TEST_STATUS | 3 | 42 | 3 (0)| 00:00:01 | | | | | |
|* 94 | INDEX UNIQUE SCAN | L_ATMS_TEST_TYPE_PK | 1 | | 0 (0)| 00:00:01 | | | Q1,03 | PCWP | |
|* 95 | TABLE ACCESS BY INDEX ROWID | L_ATMS_TEST_TYPE | 1 | 5 | 1 (0)| 00:00:01 | | | Q1,03 | PCWP | |
Predicate Information (identified by operation id):
5 - access("B_FP_TEST"."TEST_TYPE_ID"="L_ATMS_TEST_TYPE"."ATMS_TEST_TYPE_ID")
8 - access("B_FP_TEST"."STATUS_ID"="L_TEST_STATUS"."STATUS_ID")
11 - access("B_FP_TEST"."TEST_ID"="J_FP_INVESTIGATOR"."TEST_ID")
18 - access("J_OP_TEST_ANML"."START_DATE">=TO_DATE(' 2013-10-27 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND "J_OP_TEST_ANML"."START_DATE"<=TO_DATE(' 2013-11-05
00:00:00', 'syyyy-mm-dd hh24:mi:ss'))
19 - access("J_OP_TEST_ANML"."TEST_ID"="B_FP_TEST"."TEST_ID")
20 - filter("B_FP_TEST"."DATASOURCE_ID"=9 AND "B_FP_TEST"."IS_DELETED"=0 AND "B_FP_TEST"."TEST_NUM"<>1 AND "B_FP_TEST"."TEST_NUM"<>2 AND
"B_FP_TEST"."TEST_NUM"<>99)
22 - filter("J_FP_INVESTIGATOR"."IS_PI"=1)
26 - filter("L_TEST_STATUS"."STATUS"='Completed' OR "L_TEST_STATUS"."STATUS"='In-Progress' OR "L_TEST_STATUS"."STATUS"='Scheduled')
30 - filter("L_ATMS_TEST_TYPE"."IS_DELETED"=0)
34 - access("B_FP_TEST"."STATUS_ID"="L_TEST_STATUS"."STATUS_ID")
38 - filter("J_OP_TEST_ANML"."END_DATE">=TO_DATE(' 2013-10-27 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND "J_OP_TEST_ANML"."END_DATE"<=TO_DATE(' 2013-11-05
00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND (LNNVL("J_OP_TEST_ANML"."START_DATE">=TO_DATE(' 2013-10-27 00:00:00', 'syyyy-mm-dd hh24:mi:ss')) OR
LNNVL("J_OP_TEST_ANML"."START_DATE"<=TO_DATE(' 2013-11-05 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))))
39 - access("J_OP_TEST_ANML"."TEST_ID"="B_FP_TEST"."TEST_ID")
40 - filter("B_FP_TEST"."DATASOURCE_ID"=9 AND "B_FP_TEST"."IS_DELETED"=0 AND "B_FP_TEST"."TEST_NUM"<>1 AND "B_FP_TEST"."TEST_NUM"<>2 AND
"B_FP_TEST"."TEST_NUM"<>99)
41 - filter("L_TEST_STATUS"."STATUS"='Completed' OR "L_TEST_STATUS"."STATUS"='In-Progress' OR "L_TEST_STATUS"."STATUS"='Scheduled')
42 - filter("J_FP_INVESTIGATOR"."IS_PI"=1)
43 - access("B_FP_TEST"."TEST_ID"="J_FP_INVESTIGATOR"."TEST_ID")
44 - access("B_FP_TEST"."TEST_TYPE_ID"="L_ATMS_TEST_TYPE"."ATMS_TEST_TYPE_ID")
45 - filter("L_ATMS_TEST_TYPE"."IS_DELETED"=0)
50 - access("B_FP_TEST"."STATUS_ID"="L_TEST_STATUS"."STATUS_ID")
53 - access("B_FP_TEST"."TEST_ID"="J_FP_INVESTIGATOR"."TEST_ID")
60 - filter("J_OP_TEST_ANML"."END_DATE">=TO_DATE(' 2013-11-04 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND "J_OP_TEST_ANML"."START_DATE"<=TO_DATE(' 2013-11-04
00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND (LNNVL("J_OP_TEST_ANML"."END_DATE">=TO_DATE(' 2013-10-27 00:00:00', 'syyyy-mm-dd hh24:mi:ss')) OR
LNNVL("J_OP_TEST_ANML"."END_DATE"<=TO_DATE(' 2013-11-05 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))) AND (LNNVL("J_OP_TEST_ANML"."START_DATE">=TO_DATE(' 2013-10-27
00:00:00', 'syyyy-mm-dd hh24:mi:ss')) OR LNNVL("J_OP_TEST_ANML"."START_DATE"<=TO_DATE(' 2013-11-05 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))))
61 - access("J_OP_TEST_ANML"."TEST_ID"="B_FP_TEST"."TEST_ID")
62 - filter("B_FP_TEST"."DATASOURCE_ID"=9 AND "B_FP_TEST"."IS_DELETED"=0 AND "B_FP_TEST"."TEST_NUM"<>1 AND "B_FP_TEST"."TEST_NUM"<>2 AND
"B_FP_TEST"."TEST_NUM"<>99)
64 - filter("J_FP_INVESTIGATOR"."IS_PI"=1)
68 - filter("L_TEST_STATUS"."STATUS"='Completed' OR "L_TEST_STATUS"."STATUS"='In-Progress' OR "L_TEST_STATUS"."STATUS"='Scheduled')
69 - access("B_FP_TEST"."TEST_TYPE_ID"="L_ATMS_TEST_TYPE"."ATMS_TEST_TYPE_ID")
70 - filter("L_ATMS_TEST_TYPE"."IS_DELETED"=0)
75 - access("B_FP_TEST"."STATUS_ID"="L_TEST_STATUS"."STATUS_ID")
78 - access("B_FP_TEST"."TEST_ID"="J_FP_INVESTIGATOR"."TEST_ID")
85 - filter("J_OP_TEST_ANML"."END_DATE">=TO_DATE(' 2013-10-28 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND "J_OP_TEST_ANML"."START_DATE"<=TO_DATE(' 2013-10-28
00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND (LNNVL("J_OP_TEST_ANML"."END_DATE">=TO_DATE(' 2013-11-04 00:00:00', 'syyyy-mm-dd hh24:mi:ss')) OR
LNNVL("J_OP_TEST_ANML"."START_DATE"<=TO_DATE(' 2013-11-04 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))) AND (LNNVL("J_OP_TEST_ANML"."END_DATE">=TO_DATE(' 2013-10-27
00:00:00', 'syyyy-mm-dd hh24:mi:ss')) OR LNNVL("J_OP_TEST_ANML"."END_DATE"<=TO_DATE(' 2013-11-05 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))) AND
(LNNVL("J_OP_TEST_ANML"."START_DATE">=TO_DATE(' 2013-10-27 00:00:00', 'syyyy-mm-dd hh24:mi:ss')) OR LNNVL("J_OP_TEST_ANML"."START_DATE"<=TO_DATE(' 2013-11-05
00:00:00', 'syyyy-mm-dd hh24:mi:ss'))))
86 - access("J_OP_TEST_ANML"."TEST_ID"="B_FP_TEST"."TEST_ID")
87 - filter("B_FP_TEST"."DATASOURCE_ID"=9 AND "B_FP_TEST"."IS_DELETED"=0 AND "B_FP_TEST"."TEST_NUM"<>1 AND "B_FP_TEST"."TEST_NUM"<>2 AND
"B_FP_TEST"."TEST_NUM"<>99)
89 - filter("J_FP_INVESTIGATOR"."IS_PI"=1)
93 - filter("L_TEST_STATUS"."STATUS"='Completed' OR "L_TEST_STATUS"."STATUS"='In-Progress' OR "L_TEST_STATUS"."STATUS"='Scheduled')
94 - access("B_FP_TEST"."TEST_TYPE_ID"="L_ATMS_TEST_TYPE"."ATMS_TEST_TYPE_ID")
95 - filter("L_ATMS_TEST_TYPE"."IS_DELETED"=0)Excellent piece of follow-up on my first suggestion.
I nearly made a comment about how the plan doesn't show Bloom filter pruning either - and then I realised why not. The plan you've shown us comes from Explain Plan with literal values present; the trace file shows bind variables with names that are generated when cursor_sharing is set to force or similar - so the run-time plan and the plan from explain plan are almost guaranteed to be different.
Oracle support will need you to supply the plan you get from trying to run the query and then making a call to dbms_xplan.display_cursor() - dbms_xplan in 10g | Oracle Scratchpad If you do this I think you'll find that the pstart/pstop columns contain entries like :BF0000, and you may even find operations link PX JOIN FILTER CREATE / PX JOIN FILTER USE
A couple of generic notes:
if a query does sufficient work to merit parallel execution, then it's usually better to supply the best possible information to the optimizer, which means using literals rather than bind variables - you could try executing the query with the hint /*+ cursor_sharing_exact */ to stop Oracle from turning your literals into binds; it might be the presence of bind variables that's making the optimizer choose a path that has to include bloom filter pruning in your case.
Where you have the to_date() call you've used a four-digit year - which is a very good thing and helps the optimizer - but it's also a good idea to include an explicit format string as well: with a four-digit year this probably won't make any difference, but it avoids any risk of ambiguity for the optimizer.
I made a comment about the P->S stage and bottlenecks - I spent a couple more minutes looking at the plan, and I see the optimizer has used concatentation: in effect it has run three query blocks one after the other and fed the results to the query co-ordinator - in this case the P->S would make no difference to the end-user response time there's always a final P->S to the coordinator, you just happen to have three of them.
Regards
Jonathan Lewis -
OPtimizing Performance for Select query on NAST table
Hi All,
We are fetching a single record from NAST table. The table has around 10 Million Entries.
The Select Query takes around 5-6 minutes to return.
We are not using the Primary key completely. We are using only one field of the primary key.
The field is also a part of the Index but we are not using all the fields in the index as well.
We need to bring down the time. What can be the solution? I cant see any changes to the code, since its a single query and we cant use the Entire Primary key.
Would creating an Index on the fields that we are concerned with help in this regard.
Open to all solutions.
Thanks in Advance,
ImranHi,
Please check this thread
http://sap.ittoolbox.com/documents/popular-q-and-a/specifying-the-index-to-be-used-2462
For creating another secondary index in NAST whether basis will approve for this?
aRs -
Alternative for "check select-options" for select query.
hi all,
my report is using a "GET" syntax, followed by "check select-options".
My senior told me to replace the Get syntax with select query.
Now, my program also has dynamic selection screen.
the dynamic selection screen almost has all the fields of database table.
so, what is the way to replace this check select-options while applying select query?
can you tell me how dynamic selection screen fields are populated? are they stored in some internal table?
thanks for help.HI
Here is some points about LDB.
Logical databases are special ABAP programs that retrieve data and make it available to application programs. The most common use of logical databases is still to read data from database tables by linking them to executable ABAP programs.
However, from Release 4.5A, it has also been possible to call logical databases using the function module LDB_PROCESS. This allows you to call several logical databases from any ABAP program, nested in any way. It is also possible to call a logical database more than once in a program, if it has been programmed to allow this. This is particularly useful for programs with type 1.
Logical databases contain Open SQL statements that read data from the database. You do not therefore need to use SQL in your own programs. The logical database reads the program, stores them in the program if necessary, and then passes them line by line to the application program or the function module LDB_PROCESS using an interface work area
For further on LDB's refer to this link.
[http://help.sap.com/saphelp_nw04/helpdata/en/9f/db9b5e35c111d1829f0000e829fbfe/content.htm]
Hope this will help.
Reward if helpful.
Sumit Agarwal -
Logic required for select query
i have a internal table with 4 columns. 3 columns having varrious material numbers. i want to check every material with mara table. its available or not?
I need to write a single select queary? how to do this?
My internal table looks like
matnr idnrk s_idnrk normt
test10 10UPC3050 F14839030 test.
i wrotes like below
select matnr from mara into table
i_mara2 for all entries in
i_sub_file
where matnr = i_sub_file-matnr and
matnr = i_sub_file-idnrk and
matnr = i_sub_file-s_idnrk.
Its not working, How to manage this? Anyone help this.
MohahaHi fill the ranges with ur 3 material numbers.
and use it in ur select query.
define a range for mat no.
ranges : r_matnr for mara-matnr.
read table or loop with i_sub_file.
r_matnr-sign = 'I'.
r_matnr-option = 'EQ'.
r_matnr-low = 'i_sub_file-matnr.
append r_matnr. clear r_matnr.
r_matnr-sign = 'I'.
r_matnr-option = 'EQ'.
r_matnr-low = 'i_sub_file-idnrk.
append r_matnr. clear r_matnr.
r_matnr-sign = 'I'.
r_matnr-option = 'EQ'.
r_matnr-low = 'i_sub_file-s_idnrk.
append r_matnr. clear r_matnr.
now in select.
select matnr from mara into table
i_mara2 where matnr in r_matnr. -
How to write SQL hints for this query?
The query is like:
select * from foo, t
where foo.name in
(select name from bar
where id in (
select id from car
where date < sysdate
and foo.a = t.b;
I want the innermostsubquery 'select id from car ...' to be executed first, and the subquery 'select name from bar ...' to be execute second, and the outermost query 'select * from foo,t ...' to be executed the last. How can I write the Oracle sql hints to force the order?
Thanks.user553560
You might be able to create a large set of hints to force the access path you want - but unless you really know what you are doing with hints, you may find that your solution is very unstable (it might be luck rather than correctness that let's it work to start with).
The difficulty in this query is the double layer of IN subqueries, so if you can rewrite the query, you might try manually unnesting as follows:
select
t1.*. t.*
from
select
distinct t2.name
from t2
where t2.id in (
select t3.id
from t3
where t3.dated < sysdate
) v,
t1,
t
where
t1.name = v.name
and t1.a = t.bDepending on your indexing and statistics, you may find that a simple /*+ unnest */ hint in the first subquery will be sufficient to do this for your. Again depending on the statistics you may find that you have to put extra hints into the above to make Oracle use the join method and indexes you think appropriate.
N.B. The first step (as others have noted) is to check that your statistics are good before you start manipulating the code or using hints.
Regards
Jonathan Lewis
http://jonathanlewis.wordpress.com
http://www.jlcomp.demon.co.uk -
Can I Specify an Oracle Hint for a Query
We are BW 3.1 Oracle 9.2. We have a few InfoCube queries that would perform better if a full table scan on the fact table was done rather than using the system generated Star Transformation hint.
When use RSRT or other entry points to see the SQL and the Explain plan, I have the option of putting in an Oracle hint and generating another Explain Plan.
Is there any way to save the query with a different Oracle hint than the Star Transformation hint?Klaus -
Thanks for responding.
It is only a handful of queries that this is an issue with. Overall, we are certainly better off using the star transformation.
Do you know the reasoning behind letting you specify a hint when running a query through RSRV if you can never actually specify those hints for actual production execution? Is the ability to add a hint anything that we might see in the future?
In looking into this a little more, I looked at an explain plan for a query on one of our transactional InfoCubes. We are Oracle 9.2, and transactional Infocubes have B-tree indices rather than bitmap on the F fact table. Presumably to better support the input of transactions. I see in the explain plan that with the star transformation, the btree indices are converted to bitmap, then a bitmap merge, then the result of that is converted back to a btree index to read the F fact table. Without the star transformation, the query cost is half, so the ability to suppress the star transformation on F fact queries on transactional cubes would also be nice.
At another job, I used to use Brio to query a data warehouse and although Brio didn't have facility to specify a hint, you could define a calculated field in the query and actually enter the hint text as the calculation and as long as that field was the first to follow the Select stmt, it was recognized as an Oracle hint. Maybe there could be some way to sneak a hint into the query. It's not something you would want every query developer doing, but as long as someone knew when it was appropriate to override/surpress star transformation, it would be nice to be able to do.
John -
Need help in writing a select query to pull required data from 3 tables.
Hi,
I have three tables EmpIDs,EmpRoles and LatestRoles. I need to write a select Query to get roles of all employees present in EmpIDs table by referring EmpRoles and LatestRoles.
The condition is first look into table EmpRoles and if it has more than one entry for a particular Employee ID than only need to get the Role from LatestRoles other wise consider
the role from EmpRoles .
Sample Script:
Create Table #EmpIDs
(EmplID int )
Create Table #EmpRoles
(EMPID int,Designation varchar(50))
Create Table #LatestRoles
EmpID int,
Designation varchar(50)
Insert into #EmpIDs values (1),(2),(3)
Insert into #EmpRoles values (1,'Role1'),(2,'Role1'),(2,'Role2'),(3,'Role1')
Insert into #LatestRoles values (2,'Role2')
Employee ID 2 is having two roles defined in EmpRoles so for EmpID 2 need to fetch Role from LatestRoles table and for
remaining ID's need to fetch from EmpRoles .
My Final Output of select query should be like below.
EmpID Role
1 Role1
2 Role2
3 Role1
Please help.
MohanMohan,
Can you check if this answers your requirement:
Create Table #EmpIDs
(EmplID int )
Create Table #EmpRoles
(EMPID int,Designation varchar(50))
Create Table #LatestRoles
EmpID int,
Designation varchar(50)
Insert into #EmpIDs values (1)
Insert into #EmpIDs values (2)
Insert into #EmpIDs values (3)
Insert into #EmpRoles values (1,'Role1')
Insert into #EmpRoles values (2,'Role2')
Insert into #EmpRoles values (2,'Role1')
Insert into #EmpRoles values (3,'Role1')
Insert into #LatestRoles values (2,'Role2')
--Method 1
select e.EmplID,MIN(ISNULL(l.Designation,r.Designation)) as Designation
from #empids e
left join #emproles r on e.emplID=r.EmpID
left join #latestRoles l on e.emplID=l.EmpID
group by e.EmplID
--Method 2
;with cte
as
select distinct e.EmplID,r.Designation,count(*) over(partition by e.emplID) cnt
from #empids e
left join #emproles r on e.emplID=r.EmpID
select emplID,Designation
from cte
where cnt=1
UNION ALL
select a.EmplID,l.Designation
from
(select distinct EmplID from cte where cnt>1) a
join #Latestroles l on a.EmplID=l.EmpID
order by emplID
Thanks,
Jay
<If the post was helpful mark as 'Helpful' and if the post answered your query, mark as 'Answered'>
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