[teiid-issues] [JBoss JIRA] (TEIID-2039) Virtual table mapping with large number of UNIONs is resulting in excessively long source query

[Steven Hawkins (JIRA)]

    [ https://issues.jboss.org/browse/TEIID-2039?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12700334#comment-12700334 ] 

Steven Hawkins edited comment on TEIID-2039 at 6/10/12 11:06 AM:
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Marc/John,

Any update on what the user is doing here?  1 and 3 could be pursued without additional fixes.  1a and 2 could also easily be pursued with 1a being preferential if the user does not want to modify their queries and there is a general preference to not have the source evaluate uncorrelated subqueries.
                
      was (Author: shawkins):
    Mark/John,

Any update on what the user is doing here?  1 and 3 could be pursued without additional fixes.  1a and 2 could also easily be pursued with 1a being preferential if the user does not want to modify their queries and there is a general preference to not have the source evaluate uncorrelated subqueries.
                  
> Virtual table mapping with large number of UNIONs is resulting in excessively long source query
> -----------------------------------------------------------------------------------------------
>
>                 Key: TEIID-2039
>                 URL: https://issues.jboss.org/browse/TEIID-2039
>             Project: Teiid
>          Issue Type: Bug
>          Components: Query Engine
>    Affects Versions: 7.4.1, 7.7
>            Reporter: Marc Shirley
>            Assignee: Steven Hawkins
>
> Queries against a virtual table built upon several layers of UNION transformations is resulting in what appears to be a badly formed, excessively long source query (for example, a SQL string over 1 million characters) that results in slow query execution.

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