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Posted to dev@phoenix.apache.org by "chenglei (JIRA)" <ji...@apache.org> on 2016/12/30 13:32:58 UTC
[jira] [Commented] (PHOENIX-3491) OrderBy can not be compiled out
if GroupBy is not orderPreserving and OrderBy is reverse
[ https://issues.apache.org/jira/browse/PHOENIX-3491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15787679#comment-15787679 ]
chenglei commented on PHOENIX-3491:
-----------------------------------
[~jamestaylor],I noticed this patch was pushed to master branch and included in 4.9.0,Could you please close this issue and mark it resolved ?
> OrderBy can not be compiled out if GroupBy is not orderPreserving and OrderBy is reverse
> ----------------------------------------------------------------------------------------
>
> Key: PHOENIX-3491
> URL: https://issues.apache.org/jira/browse/PHOENIX-3491
> Project: Phoenix
> Issue Type: Improvement
> Affects Versions: 4.8.0
> Reporter: chenglei
> Assignee: chenglei
> Attachments: PHOENIX-3491_v1.patch, PHOENIX-3491_v2.patch
>
>
> for the following table:
> {code:borderStyle=solid}
> CREATE TABLE ORDERBY_TEST (
> ORGANIZATION_ID INTEGER NOT NULL,
> CONTAINER_ID INTEGER NOT NULL,
> SCORE INTEGER NOT NULL,
> ENTITY_ID INTEGER NOT NULL,
> CONSTRAINT TEST_PK PRIMARY KEY (
> ORGANIZATION_ID,
> CONTAINER_ID,
> SCORE,
> ENTITY_ID
> ));
> {code}
>
> If we execute explain on the following sql:
> {code:borderStyle=solid}
> SELECT ORGANIZATION_ID,SCORE FROM ORDERBY_TEST GROUP BY ORGANIZATION_ID, SCORE ORDER BY ORGANIZATION_ID DESC, SCORE DESC
> {code}
> the result is :
> {code:borderStyle=solid}
> ----------------------------------------------------------------------+
> | PLAN |
> +----------------------------------------------------------------------+
> | CLIENT 1-CHUNK PARALLEL 1-WAY FULL SCAN OVER ORDERBY_TEST |
> | SERVER FILTER BY FIRST KEY ONLY |
> | SERVER AGGREGATE INTO DISTINCT ROWS BY [ORGANIZATION_ID, SCORE] |
> | CLIENT MERGE SORT |
> | CLIENT SORTED BY [ORGANIZATION_ID DESC, SCORE DESC] |
> +----------------------------------------------------------------------+
> {code}
> from the above explain result, we can see that the ORDER BY ORGANIZATION_ID DESC, SCORE DESC is not compiled out,but obviously it should be compiled out as OrderBy.REV_ROW_KEY_ORDER_BY.
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