[jboss-jira] [JBoss JIRA] Commented: (JBPM-1081) Simulation query with stddev not supported on HSQL

Wed Nov 14 11:53:18 EST 2007

    [ http://jira.jboss.com/jira/browse/JBPM-1081?page=comments#action_12387547 ] 

Bernd Ruecker commented on JBPM-1081:
-------------------------------------

The problem is, that stddev is not included in the HSQLDialect, right. But HSQL itself supports it, at least in the newer versions.

See http://www.camunda.com/business_process_simulation_news/mysql_and_stddev.html

There you can also download a improves HSQLDialect which can handle stddev.

I now this is not nice, but I don't see any way around it, except skipping stddev OR calculating it by hand, which is quite slow in big history tables...

> Simulation query with stddev not supported on HSQL
> --------------------------------------------------
>
>                 Key: JBPM-1081
>                 URL: http://jira.jboss.com/jira/browse/JBPM-1081
>             Project: JBoss jBPM
>          Issue Type: Bug
>          Components: Simulation
>    Affects Versions: jBPM jPDL 3.2.3
>         Environment: N/A
>            Reporter: Ronald van Kuijk
>         Assigned To: Tom Baeyens
>             Fix For: jBPM jPDL 3.2.3
>
>
> According to a user in the forum, stddev is not supported in the HSQLDialect on the hibernate version that comes with jBPM.  I have not had the opportunity to verify this.

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