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From "Bryan Pendleton (JIRA)" <derby-...@db.apache.org>
Subject [jira] Updated: (DERBY-737) SYSCS_UTIL.SYSCS_COMPRESS_TABLE should create statistics if they do not exist
Date Mon, 16 Oct 2006 16:35:36 GMT
     [ http://issues.apache.org/jira/browse/DERBY-737?page=all ]

Bryan Pendleton updated DERBY-737:
----------------------------------

    Derby Info:   (was: [Patch Available])

Committed the patch to subversion as revision 464551.

Mamta, do you think this patch needs to be ported to any prior releases?


> SYSCS_UTIL.SYSCS_COMPRESS_TABLE should create statistics if they do not exist
> -----------------------------------------------------------------------------
>
>                 Key: DERBY-737
>                 URL: http://issues.apache.org/jira/browse/DERBY-737
>             Project: Derby
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 10.1.3.1, 10.0.2.0, 10.0.2.1, 10.1.1.0, 10.1.2.1, 10.2.1.6, 10.0.2.2
>            Reporter: Kathey Marsden
>         Assigned To: Mamta A. Satoor
>            Priority: Minor
>         Attachments: DERBY737_v1_diff_SYSCS_COMPRESS_TABLE.txt, DERBY737_v1_stat_SYSCS_COMPRESS_TABLE.txt
>
>
> There must be an entry in the SYSSTATISTICS table in order for the cardinality statistics
in SYSSTATISTICS to be created with SYSCS_UTIL.SYSCS_COMPRESS_TABLE 
> SYSCS_UTIL.SYSCS_COMPRESS_TABLE  should create statistics if they don't exist.  The only
way to create them if the index was created on an empty table, seems to be to drop and recreate
the index after the table has been loaded.
> The documentation will also need updating if this change is made.
> http://db.apache.org/derby/docs/10.1/tuning/ctunstats57373.html

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