db-derby-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Kathey Marsden (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-4136) Allow optimizer overrides for UPDATE and DELETE
Date Tue, 31 Mar 2009 23:41:50 GMT

     [ https://issues.apache.org/jira/browse/DERBY-4136?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Kathey Marsden updated DERBY-4136:

    Component/s: SQL

> Allow optimizer overrides for UPDATE and DELETE
> -----------------------------------------------
>                 Key: DERBY-4136
>                 URL: https://issues.apache.org/jira/browse/DERBY-4136
>             Project: Derby
>          Issue Type: Improvement
>          Components: Performance, SQL
>    Affects Versions:
>            Reporter: Ronald Tschalaer
>            Priority: Minor
> Since UPDATE and DELETE statements effectively run a query behind the scenes to find
the rows to update or delete, it would be useful to be able specify optimizer overrides (--
DERBY-PROPERTIES) for these statements too. As a specific use case, I have an issue with locking
where I need to ensure the indexes are always used in order to prevent deadlocks. The current
workaround is to run a SELECT (where I can supply the appropriate --DERBY-PROPERTIES index=...)
with an updatable ResultSet and do the updates/deletes on the ResultSet. While this works,
it is uglier and less clear than the corresponding UPDATE/DELETE statements.

This message is automatically generated by JIRA.
You can reply to this email to add a comment to the issue online.

View raw message