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DB2 - Problembeschreibung

Problem IC73588 Status: Geschlossen

INSTANCE MAY ABEND DURING REVALIDATION OF VIEW THAT HAS AN UN-TYPED NULL AS
AN OUTPUT COLUMN

Produkt:
DB2 FOR LUW / DB2FORLUW / 970 - DB2
Problembeschreibung:
Revalidation of a VIEW that contains an un-typed NULL as an 
output column may abend the instance. 
 
Stack trace from such an abend may look something like: 
<various> 
sqlrlInsertColumn 
sqlrlrsc 
sqlrlcrv_sw 
sqlnq_view_mod_catalogs 
sqlnq_ddl_create_view_end 
sqlnn_regen_view 
sqlrl_regen_view 
sqlrl_regen_view 
sqlnq_check_referenced_qtb 
sqlnq_check_referenced_qtb 
sqlnq_handle_from_table_ref 
sqlnq_handle_from_table_ref 
sqlnq_sem 
sqlnp_parser 
sqlnp_parser 
sqlnp_main 
sqlnn_cmpl 
...
Problem-Zusammenfassung:
**************************************************************** 
* USERS AFFECTED:                                              * 
* ALL                                                          * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* Revalidation of a VIEW that contains an un-typed NULL as an  * 
* output column may abend the instance.                        * 
*                                                              * 
* Stack trace from such an abend may look something like:      * 
* <various>                                                    * 
* sqlrlInsertColumn                                            * 
* sqlrlrsc                                                     * 
* sqlrlcrv_sw                                                  * 
* sqlnq_view_mod_catalogs                                      * 
* sqlnq_ddl_create_view_end                                    * 
* sqlnn_regen_view                                             * 
* sqlrl_regen_view                                             * 
* sqlrl_regen_view                                             * 
* sqlnq_check_referenced_qtb                                   * 
* sqlnq_check_referenced_qtb                                   * 
* sqlnq_handle_from_table_ref                                  * 
* sqlnq_handle_from_table_ref                                  * 
* sqlnq_sem                                                    * 
* sqlnp_parser                                                 * 
* sqlnp_parser                                                 * 
* sqlnp_main                                                   * 
* sqlnn_cmpl                                                   * 
* ...                                                          * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to DB2 Version 9.7 Fix Pack 4.                       * 
****************************************************************
Local-Fix:
- Affected view(s) may be recreated explicitly, i.e., 
CREATE OR REPLACE VIEW ... 
- To avoid the issue for future revalidations, explicitly cast 
all the NULL column definitions, i.e., 
CREATE OR REPLACE VIEW ... CAST(null AS VARCHAR(1)) AS col_1, 
CAST(null AS VARCHAR(1)) AS col_2... 
Both workarounds will behave exactly semantically identically as 
the original view.
verfügbare FixPacks:
DB2 Version 9.7 Fix Pack 4 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 5 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 6 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9a for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 10 for Linux, UNIX, and Windows

Lösung
First fixed in DB2 Version 9.7 Fix Pack 4.
Workaround
- Affected view(s) may be recreated explicitly, i.e., 
 
CREATE OR REPLACE VIEW ... 
- To avoid the issue for future revalidations, explicitly cast 
 
all the NULL column definitions, i.e., 
 
CREATE OR REPLACE VIEW ... CAST(null AS VARCHAR(1)) AS col_1, 
 
CAST(null AS VARCHAR(1)) AS col_2... 
Both workarounds will behave exactly semantically identically as 
the original view.
Weitere Daten
Datum - Problem gemeldet    :
Datum - Problem geschlossen :
Datum - der letzten Änderung:
29.12.2010
05.05.2011
05.05.2011
Problem behoben ab folgender Versionen (IBM BugInfos)
9.7.FP4
Problem behoben lt. FixList in der Version
9.7.0.4 FixList