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From "Kathey Marsden (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-4314) With derby client setTransactionIsolation executes and commits even if isolation has not changed
Date Wed, 02 Jun 2010 16:23:28 GMT

    [ https://issues.apache.org/jira/browse/DERBY-4314?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12874643#action_12874643
] 

Kathey Marsden commented on DERBY-4314:
---------------------------------------

Yes, I think we should have a release note saying that the client Driver will no longer commit
on setTransactionIsolation if the isolation level does not change. Users relying on the previous
behavior to commit their transaction, should now add an explicit commit to their code.

See Writing a release note at: http://wiki.apache.org/db-derby/ReleaseNoteProcess


> With derby client setTransactionIsolation executes and commits even if isolation has
not changed 
> -------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-4314
>                 URL: https://issues.apache.org/jira/browse/DERBY-4314
>             Project: Derby
>          Issue Type: Improvement
>          Components: JDBC, Network Client
>    Affects Versions: 10.1.3.1, 10.2.2.0, 10.3.3.0, 10.4.2.0, 10.5.1.1, 10.6.1.0
>            Reporter: Kathey Marsden
>            Assignee: Lily Wei
>            Priority: Minor
>             Fix For: 10.7.0.0
>
>         Attachments: DERBY-4314-2.diff, DERBY-4314-3.diff, DERBY-4314-5.diff, derby-4314-6a-initial_piggybacking.diff,
derby-4314-6a-initial_piggybacking.stat, DERBY-4314-6b-combinepiggybacking.diff, DERBY-4314-6c-combineaftermerge.diff,
derby-4314-6d-handle_xa.diff, DERBY-4314-7-withoutpiggybacking.diff, DERBY-4314-7b-combine.diff,
DERBY-4314.diff, ReproIsoLost.java, TestConnReuse.java, utilXid.java
>
>
> With in EmbedConnection.setIsolation() we have a check to see if the isolation level
is the same and if so just return without doing a commit:
>   public void setTransactionIsolation(int level) throws SQLException {
> 		if (level == getTransactionIsolation())
> 			return;
> with org.apache.derby.client.am.Connection we have no such check. It would be good if
the client driver acted like embedded.

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