[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-3919) Hibernate uses DROP TABLE to drop temporary tables - it should use DROP TEMPORARY TABLE when using MySQL

[Donnchadh O Donnabhain (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-3919?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=33424#action_33424 ] 

Donnchadh O Donnabhain commented on HHH-3919:
---------------------------------------------

This patch is exactly what I had in mind and seems fine.

In my own case I was able to avoid the use of temporary tables altogether (there was only one case where it was being used - a bulk update where the temporary table was actually redundant ) by slightly modifying an HQL statement and the mapping file for that class hierarchy.



> Hibernate uses DROP TABLE to drop temporary tables - it should use DROP TEMPORARY TABLE when using MySQL
> --------------------------------------------------------------------------------------------------------
>
>                 Key: HHH-3919
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3919
>             Project: Hibernate Core
>          Issue Type: Bug
>          Components: query-hql
>    Affects Versions: 3.3.1
>         Environment: MySQL 5.0.77
>            Reporter: Donnchadh O Donnabhain
>         Attachments: hibernate_mysql_drop_temporary_table.diff
>
>
> DROP TABLE requires DROP TABLE permission whereas DROP TEMPORARY TABLE doesn't.
> Currently the drop command is hardcoded as "drop table " in AbstractStatementExecutor.java (line 177).
> Something like getFactory().getDialect().getDropTemporaryTableString() is needed.

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