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Posted to issues@hive.apache.org by "Jesus Camacho Rodriguez (JIRA)" <ji...@apache.org> on 2017/12/11 21:57:00 UTC
[jira] [Assigned] (HIVE-18250) CBO gets turned off with duplicates
in RR error
[ https://issues.apache.org/jira/browse/HIVE-18250?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jesus Camacho Rodriguez reassigned HIVE-18250:
----------------------------------------------
Assignee: Jesus Camacho Rodriguez
> CBO gets turned off with duplicates in RR error
> -----------------------------------------------
>
> Key: HIVE-18250
> URL: https://issues.apache.org/jira/browse/HIVE-18250
> Project: Hive
> Issue Type: Bug
> Components: CBO, Query Planning
> Affects Versions: 2.0.0, 2.1.0, 2.2.0, 2.3.0
> Reporter: Ashutosh Chauhan
> Assignee: Jesus Camacho Rodriguez
>
> {code}
> create table t1 (a int);
> explain select t1.a as a1, min(t1.a) as a from t1 group by t1.a;
> {code}
> CBO gets turned off with:
> {code}
> WARN [2e80e34e-dc46-49cf-88bf-2c24c0262d41 main] parse.RowResolver: Found duplicate column alias in RR: null.a => {null, a1, _col0: int} adding null.a => {null, null, _col1: int}
> 2017-12-07T15:27:47,651 ERROR [2e80e34e-dc46-49cf-88bf-2c24c0262d41 main] parse.CalcitePlanner: CBO failed, skipping CBO.
> org.apache.hadoop.hive.ql.optimizer.calcite.CalciteSemanticException: Cannot add column to RR: null.a => _col1: int due to duplication, see previous warnings
> at org.apache.hadoop.hive.ql.parse.CalcitePlanner$CalcitePlannerAction.genSelectLogicalPlan(CalcitePlanner.java:3985) ~[hive-exec-3.0.0-SNAPSHOT.jar:3.0.0-SNAPSHOT]
> at org.apache.hadoop.hive.ql.parse.CalcitePlanner$CalcitePlannerAction.genLogicalPlan(CalcitePlanner.java:4313) ~[hive-exec-3.0.0-SNAPSHOT.jar:3.0.0-SNAPSHOT]
> at org.apache.hadoop.hive.ql.parse.CalcitePlanner$CalcitePlannerAction.apply(CalcitePlanner.java:1392) ~[hive-exec-3.0.0-SNAPSHOT.jar:3.0.0-SNAPSHOT]
> at org.apache.hadoop.hive.ql.parse.CalcitePlanner$CalcitePlannerAction.apply(CalcitePlanner.java:1322) ~[hive-exec-3.0.0-SNAPSHOT.jar:3.0.0-SNAPSHOT]
> {code}
> After that non-CBO path completes the query.
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