[jira] [Assigned] (NIFI-8046) ResultSetRecordSet throws exception on DB2

["Matt Burgess (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NIFI-8046?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matt Burgess reassigned NIFI-8046:
----------------------------------

    Assignee: Matt Burgess

> ResultSetRecordSet throws exception on DB2
> ------------------------------------------
>
>                 Key: NIFI-8046
>                 URL: https://issues.apache.org/jira/browse/NIFI-8046
>             Project: Apache NiFi
>          Issue Type: Improvement
>          Components: Extensions
>            Reporter: Matt Burgess
>            Assignee: Matt Burgess
>            Priority: Major
>
> Consumers of ResultSetRecordSet (such as QueryDatabaseTableRecord) can end up with an exception being thrown when processing the results. This is due to DB2 behavior that closes a ResultSet when the last row has been read, meaning next() can return true then isClosed() can return true.
> This was handled in general for the QueryDatabaseTable processors via NIFI-5303 (even though only QDT itself existed at the time, not QueryDatabaseTableRecord). However QueryDatabaseTableRecord uses ResultSetRecordSet, which calls ResultSet.next() before creating a schema from the ResultSet. On DB2 (if the result set is empty, e.g.) this results in an exception being thrown when ResultSet.getMetaData() is called from createSchema().



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