[jira] Commented: (DERBY-4521) Stream passed out to user does not heed close, allowing reads after next ResultSet#getXXX

["Dag H. Wanvik (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DERBY-4521?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12803772#action_12803772 ] 

Dag H. Wanvik commented on DERBY-4521:
--------------------------------------

The error is seen only with the embedded driver. The client driver behaves as expected.


> Stream passed out to user does not heed close, allowing reads after next ResultSet#getXXX
> -----------------------------------------------------------------------------------------
>
>                 Key: DERBY-4521
>                 URL: https://issues.apache.org/jira/browse/DERBY-4521
>             Project: Derby
>          Issue Type: Bug
>          Components: JDBC
>            Reporter: Dag H. Wanvik
>            Priority: Minor
>
> This was discovered investigating DERBY-4477 using the repro for DERBY-3646, which erroneously
> tries to keep two streams passed out via REsultSet#getBinaryStream open at the same time. This is prohibited by JDBC [1],
> but Derby allows it for non-materialized streams because the close call on the passed out stream (performed by EmbedResultSet#closeCurrentStream at the time of the next getXXX) is not heed by the underlying Derby stream. 
> [1] http://java.sun.com/j2se/1.5.0/docs/api/java/sql/ResultSet.html#getBinaryStream(int)

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