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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-545) Should ResultSet Close implicitly?
Date Mon, 04 Oct 2010 11:03:34 GMT

    [ https://issues.apache.org/jira/browse/DERBY-545?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12917559#action_12917559

Knut Anders Hatlen commented on DERBY-545:

That text was removed in JDBC 4.0. Now it says the following in 15.2.5
Closing a ResultSet Object:

| A ResultSet object is implicitly closed when
| ■ The associated Statement object is re-executed
| ■ The ResultSet is created with a Holdability of
| CLOSE_CURSORS_AT_COMMIT and an implicit or explicit commit occurs
| Note - Some JDBC driver implementations may also implicitly close the
| ResultSet when the ResultSet type is TYPE_FORWARD_ONLY and the next
| method of ResultSet returns false.

So I think the behaviour implemented in DERBY-213 complies with the
JDBC 4.0 specification. Unless there are objections, I'll close this
issue as not a problem.

> Should ResultSet Close implicitly?
> ----------------------------------
>                 Key: DERBY-545
>                 URL: https://issues.apache.org/jira/browse/DERBY-545
>             Project: Derby
>          Issue Type: Improvement
>          Components: JDBC
>    Affects Versions:,,,,,
>            Reporter: Philip Wilder
>            Priority: Minor
> While work on DERBY-213 has resulted in a client ResultSet that matches the functionality
of embedded ResultSet it is possible that both embedded and client are now wrong.
> According to the JDBC 3.0 specification:
> "For Select statements, the statement is complete when the associated result set is 
> closed. The result set is closed as soon as one of the following occurs: 
> - all of the rows have been retrieved"
> At the moment ResultSets will only close implicitly if holdability is set to CLOSE_CURSORS_AT_COMMIT
for FORWARD_ONLY ResultSets.
> The following is a link to some related work, done while working on DERBY-213. This is
potential document outlining Derby's policy on auto-commit behavior:
> http://mail-archives.apache.org/mod_mbox/db-derby-dev/200506.mbox/%3c42BC0C49.3030403@acadiau.ca%3e
> Here is my summary of my meeting with the JDBC 4.0 EG in an attempt to resolve this issue:
> http://mail-archives.apache.org/mod_mbox/db-derby-dev/200507.mbox/%3c42E80ED0.7080505@acadiau.ca%3e

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