A fix is available
APAR status
Closed as program error.
Error description
* PROBLEM DESCRIPTION: Infinite loop could happen for an * * SQL statement satisfying all of the * * following conditions: * * 1. An index is created on the xml * * column. * * 2. It contains an XMLTABLE function. * * 3. It contains a predicate that * * reference the XMLTABLE column and * * a special register. *
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: * * All DB2 11 for z/OS users of an SQL statement containing an * * XMLTABLE with a local predicate that references a special * * register. * **************************************************************** * PROBLEM DESCRIPTION: * * Infinite loop could happen for an SQL statement satisfying * * all of the following conditions: * * * * 1. An index is created on the xml column. * * * * 2. It contains an XMLTABLE function. * * * * * 3. It contains a predicate that reference the XMLTABLE * * column and a special register. * * **************************************************************** * RECOMMENDATION: * **************************************************************** An example is shown below: CREATE TABLE T1 ( C1 BIGINT, C2 XML ); CREATE INDEX IX01.T1 ON T1 (C2) GENERATE KEY USING XMLPATTERN '//abc' AS SQL TIMESTAMP(12) ; SELECT S.C1 FROM T1 AS S , XMLTABLE('customer' PASSING S.C2 COLUMNS C1 TIMESTAMP PATH 'abc' ) AS XT WHERE XT.C1 <= CURRENT TIMESTAMP ; DB2 did not correctly process the aforementioned SQL statement and resulted in an infinite loop and system outage.
Problem conclusion
DB2 has been modified to correctly process the aforementioned SQL statement. Additional Keywords: SQLSPECIALREG SQLXML SQLPREDPUSHDOWN
Temporary fix
Comments
APAR Information
APAR number
PI67416
Reported component name
DB2 OS/390 & Z/
Reported component ID
5740XYR00
Reported release
C10
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-08-11
Closed date
2017-01-24
Last modified date
2017-03-02
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI44174
Modules/Macros
DSNXOMCH DSNXOIDX DSNXQMCH DSNXOCXF DSNXOXRW
Fix information
Fixed component name
DB2 OS/390 & Z/
Fixed component ID
5740XYR00
Applicable component levels
RC10 PSY UI44174
UP17/02/10 P F702
Fix is available
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Document Information
Modified date:
02 March 2017