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MF67124 - LIC-DB-OTHER-PERFM REDUCE USE OF SPARSE MTIS WHEN THERE IS A

PTF Cover Letter


PTF ( Program Temporary Fixes ) Cover letter


Order this fix

Abstract

LIC-DB-OTHER-PERFM REDUCE USE OF SPARSE MTIS WHEN THERE IS A


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED           PTF/FIX  LEVEL

TYPE PROGRAM  RELEASE   NUMBER   MIN/MAX  OPTION
---- -------- --------- -------  -------  ------
PRE  5770999  V7R3M0    MF62602   00/00    0000
CO   5770999  V7R3M0    MF67123   00/00    0000
CO   5770999  V7R3M0    MF66440   00/00    0000
CO   5770999  V7R3M0    MF66441   00/00    0000
CO   5770999  V7R3M0    MF65270   00/00    0000
CO   5770999  V7R3M0    MF65145   00/00    0000
CO   5770999  V7R3M0    MF65143   00/00    0000
CO   5770999  V7R3M0    MF64652   00/00    0000



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APAR Error Description / Circumvention

-----------------------------------------------
reduce use of sparse MTIs when there is an acceptable perm index
per alwcpydta *NO

CORRECTION FOR APAR MA47178 :
-----------------------------
Customer runs a number of queries with the allow copy data *NO
option (via dynamic cursor).  These queries are run many times
and across many connections and cursors can often be left open
for lengths of time.  The customer had adequate permanent
indexes to service the query ordering and  local selection needs
but because the optimizer always cost compares  the "perfect"
sparse MTI against the best permanent index plan, the sparse MTI
option often wins despite the overhead of managing many,
temporary, sparse MTIs.   The optimizer doesn't really know that
there would or could be many.  This is not usually a problem if
the query is run relatively few times but when run many times,
favoring a good permanent index strategy vs  sparse MTI is the
best option.  Sparse MTIs have overhead in their creation and
also in their deletion at cursor close and if there are
numerous, accumulating sparse MTI this overhead can consume
system resource to the detriment of applications running on the
IBM i.   The solution here is to only cost compare a sparse MTI
if the servicing permanent index best plan is 'scanning' the
permanent index for the ordering.  If the best index plan is
servicing both local select and the ordering with at least one
probe predicate, the optimizer will not consider the sparse MTI.

CIRCUMVENTION FOR APAR MA47178 :
--------------------------------
None.


DESCRIPTION OF PROBLEM FIXED FOR APAR MA47373 :
-----------------------------------------------
OPNQRYF with two selection predicates in the QRYSLT parameter
and ordering, was previously using a sparse MTI in the access
plan; the MTI covered both predicates in the QRYSLT parameter.
The query started performing poorly after the access plan
switched to using an Index Probe on a permanent index.

CORRECTION FOR APAR MA47373 :
-----------------------------
In a prior PTF in the 7.2 Database Group 23/24, the optimizer
made a policy change to favor an existing permanent indexes that
can service the order by and at least one probe predicate over a
SPARSE MTI (temporary index) when running with ALWCPYDTA *NO
query request.  This is because there is overhead to sparse MTIs
(temporary indexes that are not shared) when it comes to
managing them as  they can accumulate on a table when there are
many open cursors.  That same logic, to consider a sparse MTI
for ordering is also used for native query requests like
OPNQRYF.  In the native query situations however , it is not
just alwcpydta *NO queries that consider sparse MTIs but
actually any updateable query or one run with  ALWCPYDTA(*YES)
as well.  This preference for permanent indexes vs MTI indexes
in the implementation of these native query requests can cause
poor plans if the permanent index does not provide adequate
probe coverage.  As a result, this PTF , which is being built as
a hiper,  will take native query requests out of this policy
change.  ALWCPYDTA *no is relatively rare in SQL queries
environments  but the consideration for Sparse MTIs has always
been more broadly considered in the native query environment
(like OPNQRYF) and this change moves that consideration back in
to the logic.  This fix only applies to 7.2.

CIRCUMVENTION FOR APAR MA47373 :
--------------------------------
None.


Activation Instructions


None.




Special Instructions


None.


Default Instructions

THIS PTF CAN BE APPLIED IMMEDIATE OR DELAYED.



Supersedes

PTF/FIX NO(S).  APAR TITLE LINE
--------------  ------------------------------------------------------------
   MF67122      OSP-OTHER-PERFM PREOPTIMING A UNION NODE CAUSES INTERMITTENT
   MF67116      OSP-OTHER-PERFM QUERY INTERMITTENTLY PERFORMS POORLY
   MF67003      OSP-DB-OTHER-PERFM ADDITIONAL CLEANUP OF OLAP EXPRESSIONS RE
   MF66980      LIC-DB-OTHER-PERFM SLOW PERFORMANCE AFTER PTF FOR MULTIPLE J
   MF66967      OSP-OTHER-PERFM INTERMITTENT PERFORMANCE ISSUE WHEN QUERY RE
   MF66957      OSP-DB-OTHER-F/DBOPAFFINITY-T/QQQOOODBOP-RC1720-MSGMCH3203 S
   MF66899      OSP-DB-OTHER-F/DBPMTRAP-T/QQQOOODBOP-MSGMCH3203 MSGMCH3203 F
   MF66886      OSP-PERFM QUERY PERFORMS POORLY WHEN VARIABLE LENGTH FIELDS
   MF66878      OSP-INCORROUT INCORRECT OUTPUT POSSIBLE WITH RRNPROBE PLAN (
   MF66700      OSP-DB-OTHER-F//DBOPAFFINITY-T/QQQOOODBOP-RC1720-MSGMCH3203
   MF66687      OSP-DB-OTHER-PERFM MTI
   MF66682      OSP-PERFM HIGH CPU UTILIZATION IN JOBS DUE TO LPG NOT BEING
   MF66623      OSP-PAR-940XMISC DB OPTIMIZATION IMPROVEMENTS TO AVOID EKRS
   MF66555      OSP-OTHER-PERFM SQL QUERY DOES NOT COMPLETE
   MF66539      OSP-DB-OTHER-PERFM EVI INCLUDES
   MF66506      LIC-DB-OTHER-INCORROUT LEAD FUNCTION WITH IGNORE NULLS GIVES
   MF66442      OSP-DB-OTHER-MSGSQL0901 AFTER PTFS INSTALLED, JOB STARTED TO
   MF66371      LIC-DB-OTHER-PERFM SQL STATEMENT RUNS FOR TOO LONG, SELECTIN
   MF66274      OSP-DB-OTHER-INCORROUT SQL CASE STATEMENT IN SUBQUERY WITH F
   MF66226      OSP-DB-OTHER-INCORROUT NOT GETTING A RESULT WHEN ENCODED VEC
   MF66188      OSP-PERFM SQL STATEMENT THAT HAS MULTIPLE UDF PREDICATES PER
   MF66146      OSP-DB-OTHER-F/DBPMTRAPX/0A18-RCX'1720'-MSGMCH3203 SELECT ST
   MF65988      OSP-OTHER-PERFM QUERY INTERMITTENTLY PERFORMS POORLY
   MF65982      OSP-DB-OTHER-F/DBOPAFFINITY-T/QQQOOODBOP-MSGMCH3203 SQL0901
   MF65948      OSP-DB CREATING DUPLICATE MTI'S AND CAUSING AN INCREASE IN T
   MF65814      LIC-DB-OTHER Force a table scan implementation for single ta
   MF65789      OSP-DB-OTHER-F/DBOPAFFINITY-T/QQQOOODBOP-MSGMCH3203 MSGMCH32
   MF65784      SQL-RUN-UNPRED SQL QUERY FAILS WITH MCH3203, SQL0901 AFTER C
   MF65739      OSP-PERFM SQL PERFORMANCE AT 7.3 WITH VALUES RELATION.
   MF65712      OSP-OTHER-PERFM RECURSIVE COMMON TABLE EXPRESSION INTERMITTE
   MF65663      OSP-F/QQQOOODBOP-T/QQQOOODBOP-MSGCPF9898 QUERY/400 QUERY FAI
   MF65640      OSP-DB SQL FAILS WITH MSGMCH3203 T/QQQOOODBOP
   MF65690      OSP-DB-OTHER-INCORROUT possible due to DIN RIO spinning inad
   MF65608      OSP-DB-OTHER-F/DBOPAFFINITY-T/QQQOOODBOP-MSGMCH3203 MSGMCH32
   MF65603      OSP-INCORROUT GETTING NULL BACK FROM THE COALESCE/REGEXP_REP
   MF65584      LIC-DB-OTHER-F/DBOPAFFINITY-T/QQQOOODBOP-MSGMCH3203 SQL FAIL
   MF65546      LIC-DB-OTHER-INCORROUT OLAP FUNCTIONS MAY GIVE WRONG RESULTS
   MF65537      OSP-DB-OTHER-F/DBOPAFFINITY-T/QQQOOODBOP-MSGMCH3203 RCAC TAB
   MF65494      OSP-DB-OTHER-F/DBOPACCESSPLANQDSPOPULATE-T/QQQOOODBOP- MSGMC
   MF65440      OSP-MSGCPF4204 INTERNAL QUERY FAILURE RELATED TO LOOK-AHEAD
   MF65435      OSP-DB-OTHER-F/DBPMHASH-T/QDBGETMQO-MSGMCH3402 DRDA APPLICAT
   MF65417      OSP-DB-OTHER-F/DBOPSTRATEGY-T/QQQOOODBOP-MSGMCH3203 SQL GENE
   MF65401      OSP-DB-OTHER-PERFM POOR PLAN CHOICE BY SQL OPTIMIZER
   MF65391      LIC-DB-OTHER-F/DBOPAFFINITY-T/QQQOOODBOP-MSGMCH3203 SQL FAIL
   MF65380      OSP-DB-OTHER-MSGSQL0913 WITH ISOLATION LEVEL UR *CHANGE WHEN
   MF65323      SQL-RUN-INCORROUT FETCH RELATIVE - RETURNS DUPLICATE ROWS -
   MF65358      OSP-OTHER-PERFM INDEX ADVISOR RECOMMENDING TOO MANY EVIS
   MF65300      LIC-DB-OTHER-F/DBOPEXPRVALMISC-T/QQQOOODBOP-MSGMCH3203 RCAC
   MF65306      OSP-F/DBPMTRAP-T/QQQOOODBOP-MSGMCH3203 SQL STATEMENT FAILS W
   MF65292      LIC-DB-OTHER-PERFM SQL OPTIMIZATION TIME PERFORMANCE ISSUE W
   MF65309      OSP-OTHER-PERFM COMPLEX JOIN QUERY PERFORMS POORLY
   MF65269      LIC-DB-OTHER-PERFM SQL OPTIMIZATION TIME PERFORMANCE ISSUE W
   MF65250      OSP-DB-OTHER-F/DBOPOPERATIONMISC-T/QQQOOODBOP-MSGMCH3601 MSG
   MF65242      OSP-DB-OTHER-F/DBOPSTRATEGYORDERING-T/QQQOOODBOP-MSGMCH3203
   MF65241      OSP-DB-OTHER-F/DBOPOPERATIONMISC-T/QQQOOODBOP-RC1720-MSGMCH3
   MF65222      DATAPARTITIONNUM update lock fence and constant fixes.
   MF65224      OSP-OTHER-PERFM COMPLEX JOIN QUERY PERFORMS POORLY
   MF65217      LIC-DB-OTHER-PERFM COMPLEX CONNECT BY QUERY RUNS POORLY AFTE
   MF65151      OSP-OTHER-PERFM SQL QUERY PERFORMANCE WHEN QUERY CONTAINS NO
   MF65146      LIC-DB-OTHER Allow duplicate keys in JSON_OBJECT and JSON_OB
   MF65103      OSP-F/DBOPAFFINITY-T/QQQOOODBOP-MSGMCH3203 MSGCPF9898 MSGCPF
   MF65045      LIC-DB-OTHER-PERFM QUERY OPTIMIZER CHOOSES SUB-OPTIMAL INDEX
   MF65011      OSP-DB-OTHER-F/DBPMTRAP-T/QQQOOODBOP-MSGMCH3203 RUNNING A SE
   MF64973      OSP-DB-OTHER-PERFM JOIN FAN-IN WASN'T RECOGNIZED IN SOME CAS
   MF64973      OSP-DB-OTHER-PERFM WHEN RCAC PERMISSIONS ARE ADDED TO A FILE
   MF64883      OSP-DB-OTHER OPNQRYF WITH DIFFERENT KEYFLD AND GRPFLD PARAME
   MF64869      LIC-DB-OTHER Internal maintenance
   MF64824      LIC-DB-OTHER Internal Maintenance
   MF64797      LIC-DB-INCORROUT Grouping when SMP
   MF64795      OSP-DB-OTHER-F/DBPMTRAP-T/QQQOOODBOP-RC1720-MSGMCH3203 SQL W
   MF64775      OSP-DB-OTHER-F/DBOPAFFINITY-T/QQQOOODBOP-MSGMCH3203 MSGMCH32
   MF64753      LIC-DB-OTHER-PERFM OPTIMIZATION PHASE FOR QUERIES WITH ISOLA
   MF64746      OSP-OTHER-PERFM QUERY PERFORMANCE
   MF64741      PERFM-HLIC-94XXBASE NON OPTIMAL JOIN ORDER SELECTED DUE TO I
   MF64722      LIC-DB-OTHER-PERFM CACHED STRATEGIES WITH QDSPOPULATES USED
   MF64693      LIC-DB-OTHER Update of partitioned table fails
   MF64667      OSP-DB-OTHER-F/DBPMTRAP-T/QDBGETMQO-MSGMCH3203 RUNNING AN SQ
   MF64659      LIC-DB-OTHER-INCORROUT Queries that use Bitmap Probe on part
   MF64653      LIC-DB-OTHER-F/DBOPEXPRQDS-T/QQQOOODBOP-MSGMCH3203 MAY OCCUR
   MF64646      F/DBOPQUERY-MSGMCH3203 NATIVE QUERY USING TODAY CONSTANT STA
   MF64637      LIC-DB-OTHER-INCORROUT Queries with complex aggregate functi
   MF64584      LIC-DB-OTHER-INCORROUT QUERY FAILS TO RETURN EXPECTED RESULT
   MF64562      LIC-DB-OTHER-PERFM JOIN QUERY PERFORMANCE WITH SCROLLABLE CU
   MF64529      F/DBOPSTRATEGYLPG-MSGMCH3203 QUERY FUNCTION CHECKS APPLYING
   MF64533      OSP-DB-OTHER-PERFM INEFFICIENT JOIN ORDER WHEN PREDICATES AR
   MF64530      OSP-OTHER-PERFM QUERY PERFORMANCE
   MF64472      OSP LONG RUNNING QUERY USING A MTI
   MF64388      SLIC-DB-INCORROUT Scalar Aggregate OLAPs and WHERE Clause
   MF64388      LIC-DB-INCORROUT OLAPs and GROUPing queries
   MF64388      LIC-DB-PERFM Optimization time performance improvements
   MF64344      LIC-DB-OTHER Query with grouping sets and table function fai
   MF64332      LIC-DB-OTHER-UNPRED Query with distinct subselect fails
   MF64332      LIC-DB-OTHER-INCORROUT Grouping queries over DecFloat column
   MF64332      LIC-DB-OTHER-INCORROUT LISTAGG, XMLAGG, JSON_ARRAYAGG may ha
   MF64318      OSP-LOOP UNABLE TO END INTERACTIVE JOBS EXECUTING SQL
   MF64283      OSP-DB-OTHER-SAP400-THREADS-INCORROUT SELECT STMT WITH '=' ,
   MF64267      OSP-DB-OTHER-PERFM POOR PERFORMANCE OF QUERY
   MF64261      LIC-DB-OTHER Redundant index advice on equal join predicates
   MF64261      LIC-DB-OTHER-F//DBPMNATIVEACCESS-T/QDBGETKY-MSGMCH1825 QUERY
   MF64244      F/OPTIMIZER-UDFINCORROUTAFTERCLEARINGPLANCACHE UDF INCORRECT
   MF64126      OSP-DB-OTHER-F/DBOPAFFINITY-T/QQQOOODBOP-MSGMCH3203 LARGE CA
   MF64118      OSP-DB-OTHER-INCORROUT SELECT STMT WITH ORDER BY CLAUSE PROD
   MF64096      OSP-F/DBOPEXPRQDS-T/QQQOOODBOP-MSGMCH3601 SQL QUERY FAILS WI
   MF64045      OSP-F/DBPMTRAP-T/QQQOOODBOP-MSGMCH3203 QUERY FAILS WITH MSGM
   MF64014      LIC-DB Internal Maintenance
   MF64009      LIC-DB-OTHER Internal Database Maintenance.
   MF63999      OSP-OTHER-PERFM OPTIMAL INDEX WAS COSTED HIGHER THEN A LESS
   MF63909      LIC-DB-OTHER INCORROUT Index Merge Ordering Plan with index
   MF63898      LIC-DB Internal Maintenance
   MF63875      OSP-DB-OTHER-F/DBOPQUERY-T/QQQOOODBOPX/4994-MSGMCH3203 QRYDF
   MF63838      OSP-DB-OTHER-F/DBOPAFFINITY-T/QQQOOODBOP-MSGMCH3203 UNION
   MF63802      OSP-DB-OTHER-PERFM OPTIMIZER SQL JOIN PLAN
   MF63794      OSP-DB-OTHER-F/DBOPSTRATEGYNORMALIZATION-T/QQQOOODBOP- MSGMC
   MF63755      OSP-OTHER-PERFM COGNOS QUERY PERFORMS POORLY AFTER BOTH THE
   MF63743      OSP-DB-OTHER-F/DBOPAFFINITY-T/QQQOOODBOP-RCFUNCTIONERRORX'17
   MF63714      OSP-UNPRED QUERY ESTIMATED RUNTIME WITH XMLELEMENT FIELD SEL
   MF63583      LIC-DB-OTHER-PERFM LEFT OUTER JOIN QUERY PERFORMANCE
   MF63570      LIC-DB-PERFM Random IO for tables
   MF63553      OSP-DB-OTHER-F/DBOPAFFINITYX/68C4-T/QQQOOODBOPX4994-MSGMCH32
   MF63445      OSP-DB-OTHER-F/DBOPAFFINITYX/68C4-T/QQQOOODBOPX4994-MSGMCH32
   MF63445      LIC-DB-MSGMCH3203 T/F QQQOOODBOP/DbopAffinity when using CUB
   MF63434      LIC-DB-OTHER-PERFM Optimization time improvements for comple
   MF63412      OSP-PERFM OPTIMIZER ENHANCEMENT TO MAKE THE CORRECT DECISION
   MF63370      OSP-F/DBPMTRAP-T/QQQOOODBOP-RC1720-MSGMCH3203 IF LOGICAL FIL
   MF63340      LIC-DB Improve AQP's ability to re-optimize LPG plans
   MF63301      LIC-DB Internal Maintenance
   MF63281      LIC-DB-OTHER-PERM Improve query performance by removing extr
   MF63268      LIC-DB Optimizer choosing index with 8k page size leads to p
   MF63208      LIC-DB-OTHER-PERFM LONG OPTIMIZATION OF COMPLEX QUERY WITH M
   MF63173      OSP-DB-OTHER-PERFM SLOW TABLE SCAN USED FOR SCROLL CURSOR WI
   MF63159      OSP-OTHER-PERFM JOIN QUERY PERFORMANCE
   MF63117      LIC-DB-PERFM Long optimization time for OLAP and SMP queries
   MF63085      LIC-DB-OTHER-PERFM IMPROVE PARTITION AVOIDANCE FOR JOIN
   MF63069      LIC-DB-OTHER-INCORROUT SQLRPGLE USING XML FAILS WITH SQLSTAT
   MF62937      LIC-DB-MSGMCH3203 Scalar OLAPs and RANK OLAP
   MF62922      LIC-DB-PERFM Poor Plan
   MF62874      LIC QUERY WITH TRANSITIVE JOIN NOT RETURNING THE CORRECT RES
   MF62862      LIC-DB-PERFM Index Merge Ordering
   MF62855      OSP-DB QUERY THAT REUSING A PLAN IS NOT UPDATING ALL PREDICA
   MF62850      LIC-DB-PERFM Excessive optimization time when MQTs enabled
   MF61420      LIC-DB-MSGMCH3203 DbstMdDadDataSpaceConcrete
   MF61207      OSP-DB MSGMCH3601 F/DBPMFORMAT T/QQQOOODBOP VL0600 BADD
   MF62762      OSP-DBPARL-PERFM LIMITED PLAN CHOICE DUE TO JOIN ORDER RESUL
   MF62743      OSP-DB-OTHER-F/DBPMTRAPX/09B8-T/DBQQQOOODBOPX/4963-MSGMCH320
   MF62649      F/QQQOOODBOP-MSGMCH3203 MCH3203 F/ QQQOOODBOP T/ QQQOOOINV
   MF62647      LIC-DB-OTHER-INCORROUT QUERY/400 RETURNS TOO MANY ROWS IN SQ
   MF62606      LIC-DB-OTHER-INCORROUT Incorrectly sorted results possible w
   MF62504      DB-LIC-MSGMCH3203 Plan Cache Snapshot  sEstimatedIoTimeInUs_
   MF62498      LIC-DB-OTHER OLAP function over union subselect may fail
   MF62459      LIC-DB-OTHER IS NULL index advice ordering.
   MF62435      LIC-DB-OTHER Internal Database Maintenance.
   MF62419      LIC-DB-INCORROUT  update with datapartitionname and smp
   MF62416      LIC-DB-INCORROUT SMP Query with Ordering
   MF62412      F/DBOPOPERATIONMISC-MSGMCH3203 F/DBOPOPERATIONMISC-MSGMCH320
   MF62373      LIC-DB-PERFM Not using EVI Only Access
   MF62368      LIC-DB-OTHER-PERFM IMPROVE PERFORMANCE OF COMPLEX SQL QUERIE
   MF62365      LIC-DB-PERFM Optimization time with many nested subquery lev
   MF62315      OSP-DB-OTHER-UNPRED RECORD NOT FOUND ON A PARTITIONED TABLE
   MF62305      LIC-DB-PERFM SMP support for OLAP queries
   MF62296      LIC-DB-OTHER-PERFM QRY/400 TAKES MORE TIME TO OPTIMIZE
   MF62243      OSP-DB-OTHER-UNPRED TMPSTGLK SQE BUCKET 8 *DATABASE SEGMENT
   MF62219      LIC-DB-OTHER Fixes error caused by null ordering on DENSE_RA
   MF62198      LIC-DB-OTHER-F/DBOPEXPRQDS-T/QQQOOODBOP-MSGMCH3601 SQL SELEC
   MF62195      LIC-DB-OTHER-INCORROUT WRKQRY OUTPUT IS NOT IN THE SPECIFIED
   MF62122      LIC-DB-OTHER Optimizer support for PERCENTILE_CONT and PERCE
   MF62117      OSP-DB-OTHER-F/DBPMTRAP-T/QQQOOODBOP-MSGMCH3203 MSGMCH3203 F
   MF62117      OSP-DB-OTHER-F/DBOPAFFINITY-T/QQQOOODBOP-MSGMCH3203 WRONG SE
   MF62078      LIC-DB Internal Maintenance
   MF62077      LIC-DB-OTHER-F/ASSERT-T/QQQOOODBOP-MSGMCH3203 RUNNING COMPLI
   MF62071      OSP-DB_OTHER  FULL OUTER JOIN ESCAPING QUERY NORMALIZATION
   MF62042      LIC-DB-MSGMCH3203 Partitioned table query with SMP and LPG
   MF62021      LIC-DB-OTHER Internal Maintenance
   MF62020      LIC-DB-OTHER-UNPRED Grouping set query fails with MCH3203 un
   MF61856      OSP-DB-OTHER-INCORROUT INCORRECT RESULTS MAY OCCUR WITH REPL
   MF61853      OSP-DB-OTHER-PERFM SLOW PERFORMANCE AFTER CUME JOIN OPTIMIZA
   MF61853      OSP-DB-OTHER MSGMCH3203 F/DBPMTRAP T/QQQOOODBOP
   MF61853      OSP-INCORROUT WHEN FULL OUTER JOIN QUERY HAS SPECIFIC STRUCT
   MF61725      LIC-DB PERFM LONG RUNNING SQL QUERY WITH EVI ACCESS.
   MF61713      LIC-DB-OTHER Index advising for IS NULL predicates.
   MF61692      LIC-DB-MSGMCH3203 OLAP Aggregate query
   MF61684      LIC-DB Internal Database Maintenance
   MF61646      LIC-DB-PERFM SMP with Grouping and UNION
   MF61609      OSP-DB-OTHER-THREADS-F/DBOPAFFINITY-T/QQQOOODBOP-MSGMCH3203
   MF61609      OSP-DB-OTHER-INCORROUT INCORRECT OUTPUT MAY OCCUR WITH A CRO
   MF61583      LIC-DB-INCORROUT Scalar aggregate OLAP when arg is constant
   MF61551      LIC-DB-INCORROUT Grouping query with OLAP
   MF61506      LIC-DB-PERFM SQL Improve column elimination in union queries
   MF61398      LIC-DB-PERFM Optimizer picking PTL scan over index probe pla
   MF61375      LIC-DB-INCORROUT OLAPs with Different Partition By clauses
   MF61334      LIC-DB Internal Maintenance
   MF61217      OSP-DB-OTHER-F/DBOPSTRATEGY-T/QQQOOODBOP-MSGMCH3601 WHEN A D
   MF61125      OSP-DB-OTHER-F/DBLISTHOME-T/QQQOOODBOP-MSGMCH3203 MSGMCH3203
   MF61125      F/QSQFETCH-MSGSQL0811-RCTYPE1 FROM SQL QUERY WITH FETCH FIRS
   MF61125      LIC-DB-OTHER-F/QDBSIGEX-MSGCPF5149 MAY OCCUR WHEN USING USIN
   MF61125      LIC-INCORROUT NTH_VALUE when used with other OLAP aggregates
   MF61125      LIC-DB-OTHER-F/DBPMTRAPX/0958-T/QQQOOODBOP-RCX/1720-MSGMCH32
   MF60929      LIC-DB-MSGMCH32303 Aggregate OLAP and Ordering
   MF60929      LIC-DB-PERFM SQL EVI Only Access query optimization techniqu
   MF60929      OSP-UNPRED WHEN USING SQE QUERY ENGINE DUPLICATE MTI'S MAY B
   MF61588      LIC-DB-PERFM bad plan when running commit *ALL
   MF61256      OSP-DB-OTHER-INCORROUT A SQL QUERY MAY SHOW A NULL FOR A COL
   MF61211      LIC-DB-OTHER-PERFM SLOW PERFORMANCE ON A RECURSIVE COMMON TA
   MF61148      LIC-PERFM-PAR-940XMISC Bad Query Plan
   MF61063      LIC-DB-PERFM Union Queries

Summary Information

System..............................i
Models..............................
Release.............................V7R3M0
Licensed Program...............5770999
APAR Fixed..........................View details for APAR MA47178
View details for APAR MA47373
Superseded by:......................View fix details for PTF MF68239
Recompile...........................N
Library.............................QSYS
MRI Feature ........................NONE
Cum Level...........................C0310730


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Document Information

Modified date:
27 January 2021