[jira] [Commented] (IMPALA-12019) Support ORDER BY for arrays of fixed length types in select list

["ASF subversion and git services (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IMPALA-12019?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17723882#comment-17723882 ] 

ASF subversion and git services commented on IMPALA-12019:
----------------------------------------------------------

Commit ff3d0c79841b78f99fa78d81b1dca4371cd7bc99 in impala's branch refs/heads/master from Daniel Becker
[ https://gitbox.apache.org/repos/asf?p=impala.git;h=ff3d0c798 ]

IMPALA-12019: Support ORDER BY for arrays of fixed length types in select list

As a first stage of IMPALA-10939, this change implements support for
including in the sorting tuple top-level collections that only contain
fixed length types (including fixed length structs). For these types the
implementation is almost the same as the existing handling of strings.

Another limitation is that structs that contain any type of collection
are not yet allowed in the sorting tuple.

Also refactored the RawValue::Write*() functions to have a clearer
interface.

Testing:
 - Added a new test table that contains many rows with arrays. This is
   queried in a new test added in test_sort.py, to ensure that we handle
   spilling correctly.
 - Added tests that have arrays and/or maps in the sorting tuple in
   test_queries.py::TestQueries::{test_sort,
       test_top_n,test_partitioned_top_n}.

Change-Id: Ic7974ef392c1412e8c60231e3420367bd189677a
Reviewed-on: http://gerrit.cloudera.org:8080/19660
Reviewed-by: Csaba Ringhofer <cs...@cloudera.com>
Tested-by: Impala Public Jenkins <im...@cloudera.com>


> Support ORDER BY for arrays of fixed length types in select list
> ----------------------------------------------------------------
>
>                 Key: IMPALA-12019
>                 URL: https://issues.apache.org/jira/browse/IMPALA-12019
>             Project: IMPALA
>          Issue Type: Sub-task
>          Components: Backend, Frontend
>            Reporter: Daniel Becker
>            Assignee: Daniel Becker
>            Priority: Major
>
> As a first stage of IMPALA-10939, we should implement support for ORDER BY for arrays that only contain fixed length types. That way the implementation could be almost the same as the existing handling of strings.



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