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https://issues.apache.org/jira/browse/PHOENIX-3491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15672486#comment-15672486
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chenglei edited comment on PHOENIX-3491 at 11/17/16 2:51 AM:
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Just from PHOENIX-3451,but is irrelevant to PHOENIX-3451,so open a new JIRA.
was (Author: comnetwork):
Just from PHOENIX-3451,but is irrelevant to PHOENIX-3451,so open a new JIRA
> OrderBy should be compiled out when GroupBy is not orderPreserving but
> 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
>
> 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 2-CHUNK PARALLEL 2-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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