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Posted to derby-dev@db.apache.org by "Knut Anders Hatlen (JIRA)" <ji...@apache.org> on 2012/11/02 08:50:12 UTC
[jira] [Commented] (DERBY-5974) Convert TIMESTAMP metadata columns
to TIMESTAMP WITH TIMEZONE after we implement that datatype.
[ https://issues.apache.org/jira/browse/DERBY-5974?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13489302#comment-13489302 ]
Knut Anders Hatlen commented on DERBY-5974:
-------------------------------------------
Workarounds for the test instabilities around time zone changes have been put into AutomaticIndexStatisticsTest (DERBY-5964) and NativeAuthenticationServiceTest (DERBY-5966). I've put references to this issue in the code comments. When we've fixed this issue, the workarounds can be removed.
> Convert TIMESTAMP metadata columns to TIMESTAMP WITH TIMEZONE after we implement that datatype.
> -----------------------------------------------------------------------------------------------
>
> Key: DERBY-5974
> URL: https://issues.apache.org/jira/browse/DERBY-5974
> Project: Derby
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 10.10.0.0
> Reporter: Rick Hillegas
>
> After we implement TIMESTAMP WITH TIMEZONE, we should consider converting our existing TIMESTAMP metadata columns to be TIMESTAMP WITH TIMEZONE. This may insulate us from the hiccups around shifts between winter and summer time as seen, for instance, on DERBY-5966.
> The current TIMESTAMP metadata columns are:
> SYSSTATEMENTS.LASTCOMPILED
> SYSSTATISTICS.CREATIONTIMESTAMP
> SYSTRIGGERS.CREATIONTIMESTAMP
> SYSUSERS.LASTMODIFIED
> as seen by running the following script (which uses the DBMDWrapper routines attached to DERBY-3973):
> connect 'jdbc:derby:memory:db;create=true';
> create procedure registerPublicStaticMethods( in connectionURL varchar( 200 ), in printSQL boolean )
> language java parameter style java modifies sql data
> external name 'DBMDWrapper.registerPublicStaticMethods';
> call registerPublicStaticMethods( 'jdbc:default:connection', false );
> select table_name || '.' || column_name
> from table ( getColumns( null, null, '%', '%' ) ) s
> where data_type = 93;
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