[teiid-issues] [JBoss JIRA] (TEIID-2146) Dependent join independent dup removal issue

[Steven Hawkins (JIRA)]

     [ https://issues.jboss.org/browse/TEIID-2146?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins resolved TEIID-2146.
-----------------------------------

    Resolution: Done


changed the sortutility to only add the remaining columns for dup_remove_sort, not dup_remove.  also updated the DependentCriteriaProcessor distinct value checks - but that change is not required for backporting.
                
> Dependent join independent dup removal issue
> --------------------------------------------
>
>                 Key: TEIID-2146
>                 URL: https://issues.jboss.org/browse/TEIID-2146
>             Project: Teiid
>          Issue Type: Feature Request
>          Components: Query Engine
>    Affects Versions: 7.1
>            Reporter: Steven Hawkins
>            Assignee: Steven Hawkins
>            Priority: Blocker
>             Fix For: 8.1
>
>
> If a dependent join uses columns from the independent side beyond the join predicates and has unique values with duplicates for the predicate value from the independent side, then the duplicate removal will fail to remove the duplicates, since it is mistakenly using all columns.
> If the duplicates then span multiple dependent queries, such as would be the case with large dependent joins or when a source is used with limited value pushdown (such as sybase), then the join result can be incorrect with duplicate rows.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.jboss.org/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira