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MF66098 - OSP-DB VL0600BADD CAN BE SEEN DURING VALIDATION OF AN ACCESS

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PTF ( Program Temporary Fixes ) Cover letter


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Abstract

OSP-DB VL0600BADD CAN BE SEEN DURING VALIDATION OF AN ACCESS


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED           PTF/FIX  LEVEL

TYPE PROGRAM  RELEASE   NUMBER   MIN/MAX  OPTION
---- -------- --------- -------  -------  ------
CO   5770999  V7R3M0    MF62564   00/00    0000



NOTICE:
-------
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APAR Error Description / Circumvention

-----------------------------------------------
VL0600BADD can be seen during validation of an access plan and
that plan can not be used due to 80'x in update method of
DbopStatementInfo. The system will then choose a different plan.

CORRECTION FOR APAR MA47467 :
-----------------------------
This pointer not set (80'x) VLOG doesn't prevent the query from
running but it still has overhead.  In certain circumstances, if
the access plan being validated is for a query using select/omit
or sparse indexes as part of the access plan, the optimizer
needs to verify that the current query predicate selection (host
var values)  still matches the sparse index selection.  There is
a path in that validate code that could take an 80'x/Pointer not
Set.  It is not a path that is always taken but when it is, the
validate will fail, a 0600 BADD will be generated and then query
will re-optimize for a new plan.  The nuisance here is the VLOG
and any unnecessary re-optimization performed.

CIRCUMVENTION FOR APAR MA47467 :
--------------------------------
None.


Activation Instructions


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Special Instructions


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THIS PTF CAN BE APPLIED IMMEDIATE OR DELAYED.



Supersedes

PTF/FIX NO(S).  APAR TITLE LINE
--------------  ------------------------------------------------------------
   MF64432      F/DBOPNODE-MSGMCH3203-RC1720 F/DBOPNODE-MSGMCH3203-RC1720
   MF62563      LIC-DB-PERFM improved expression evaluator performance

Summary Information

System..............................i
Models..............................
Release.............................V7R3M0
Licensed Program...............5770999
APAR Fixed..........................View details for APAR MA47467
Superseded by:......................
Recompile...........................N
Library.............................QSYS
MRI Feature ........................NONE
Cum Level...........................C9311730


IBM i Support

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Document Information

Modified date:
28 June 2019