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https://issues.apache.org/jira/browse/PIG-1069?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12774644#action_12774644
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Hadoop QA commented on PIG-1069:
--------------------------------
+1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12424259/OrderPreservingSortedTableUnion_svn.patch
against trunk revision 833549.
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 22 new or modified tests.
+1 javadoc. The javadoc tool did not generate any warning messages.
+1 javac. The applied patch does not increase the total number of javac
compiler warnings.
+1 findbugs. The patch does not introduce any new Findbugs warnings.
+1 release audit. The applied patch does not increase the total number of
release audit warnings.
+1 core tests. The patch passed core unit tests.
+1 contrib tests. The patch passed contrib unit tests.
Test results:
http://hudson.zones.apache.org/hudson/job/Pig-Patch-h7.grid.sp2.yahoo.net/142/testReport/
Findbugs warnings:
http://hudson.zones.apache.org/hudson/job/Pig-Patch-h7.grid.sp2.yahoo.net/142/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output:
http://hudson.zones.apache.org/hudson/job/Pig-Patch-h7.grid.sp2.yahoo.net/142/console
This message is automatically generated.
> [zebra] Order Preserving Sorted Table Union
> -------------------------------------------
>
> Key: PIG-1069
> URL: https://issues.apache.org/jira/browse/PIG-1069
> Project: Pig
> Issue Type: New Feature
> Affects Versions: 0.6.0
> Reporter: Yan Zhou
> Assignee: Yan Zhou
> Attachments: OrderPreservingSortedTableUnion_svn.patch
>
>
> The output schema will adopt a "schema union" semantics, namely, if an output
> column only appears in one component table, the result rows will have the
> values of the column if the rows are from that component table and null
> otherwise; on the other hand, if an output column appears in multiple
> component tables, the types of the column in all the component tables must be
> identical. Otherwise, an exception will be thrown. The result rows will have
> the values of the column if the rows are from the component tables that have
> the column themselves, or null if otherwise.
> The order preserving sort-unioned results could be further indexed by the
> component tables if the projection contains column(s) named "source_table".
> If so specified, the component table index will be output at the position(s)
> as specified in the projection list. If the underlying table is not a union
> of sorted tables, use of the special column name in projection will cause an
> exception thrown.
> If an attempt is made to create a table of a column named "source_table", an
> excpetion will be thrown as the name is reserved by zebra for the virtual
> name.
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