|
Problem IC75689
|
Status: Closed |
GENERATING AN EXPLAIN OF A QUERY MIGHT RETURN EXP0021W IN SPATIAL ENABLED ENVIRONMENT. |
| product: |
DB2 FOR LUW / DB2FORLUW / 970 - DB2 |
| Problem description: |
Generating an EXPLAIN of a query might return the following
warning messages in spatial enabled environment.
EXP0021W Table column has no statistics. The column <column
name of spatial coumn> of table
"<schema> "."<table name>" has not had runstats run on it.
This can lead to poor cardinality and predicate filtering
estimates.
This is due to DB2 doesn't collect the statistics for the
spatial extender column. DB2 optimizer should block above
warning message for spatial extender column |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* softwater *
****************************************************************
* PROBLEM DESCRIPTION: *
* Generating an EXPLAIN of a query might return the following *
* *
* warning messages in spatial enabled environment. *
* *
* *
* *
* *
* *
* EXP0021W Table column has no statistics. The column *
* <column *
* name of spatial coumn> of table *
* *
* "<schema> "."<table name>" has not had runstats run on it. *
* *
* This can lead to poor cardinality and predicate filtering *
* *
* estimates. *
* *
* *
* *
* This is due to DB2 doesn't collect the statistics for the *
* *
* spatial extender column. DB2 optimizer should block above *
* *
* warning message for spatial extender column *
****************************************************************
* RECOMMENDATION: *
* move to v97 fp5 *
**************************************************************** |
| Local Fix: |
|
| available fix packs: |
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
|
| Solution |
this is fixed in v97 fp5 |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 08.04.2011
08.12.2011
08.12.2011 |
| Problem solved at the following versions (IBM BugInfos) |
9.7.FP5
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.7.0.5
|
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