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From "Hive QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-13452) StatsOptimizer should return no rows on empty table with group by
Date Tue, 13 Dec 2016 05:17:58 GMT

    [ https://issues.apache.org/jira/browse/HIVE-13452?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15744204#comment-15744204
] 

Hive QA commented on HIVE-13452:
--------------------------------



Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12842907/HIVE-13452.01.patch

{color:green}SUCCESS:{color} +1 due to 1 test(s) being added or modified.

{color:red}ERROR:{color} -1 due to 9 failed/errored test(s), 10782 tests executed
*Failed tests:*
{noformat}
TestMiniLlapLocalCliDriver - did not produce a TEST-*.xml file (likely timed out) (batchId=144)
	[vectorized_rcfile_columnar.q,vector_elt.q,explainuser_1.q,multi_insert.q,tez_dml.q,vector_bround.q,schema_evol_orc_acid_table.q,vector_when_case_null.q,orc_ppd_schema_evol_1b.q,vector_join30.q,vectorization_11.q,cte_3.q,update_tmp_table.q,vector_decimal_cast.q,groupby_grouping_id2.q,vector_decimal_round.q,tez_smb_empty.q,orc_merge6.q,vector_decimal_trailing.q,cte_5.q,tez_union.q,cbo_rp_subq_not_in.q,vector_decimal_2.q,columnStatsUpdateForStatsOptimizer_1.q,vector_outer_join3.q,schema_evol_text_vec_part_all_complex.q,tez_dynpart_hashjoin_2.q,auto_sortmerge_join_12.q,offset_limit.q,tez_union_multiinsert.q]
TestVectorizedColumnReaderBase - did not produce a TEST-*.xml file (likely timed out) (batchId=251)
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver[sample2] (batchId=5)
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver[sample4] (batchId=15)
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver[sample6] (batchId=61)
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver[sample7] (batchId=60)
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver[sample9] (batchId=38)
org.apache.hadoop.hive.cli.TestMiniLlapCliDriver.testCliDriver[transform_ppr2] (batchId=135)
org.apache.hadoop.hive.cli.TestMiniLlapLocalCliDriver.testCliDriver[stats_based_fetch_decision]
(batchId=151)
{noformat}

Test results: https://builds.apache.org/job/PreCommit-HIVE-Build/2554/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/2554/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-2554/

Messages:
{noformat}
Executing org.apache.hive.ptest.execution.TestCheckPhase
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
Tests exited with: TestsFailedException: 9 tests failed
{noformat}

This message is automatically generated.

ATTACHMENT ID: 12842907 - PreCommit-HIVE-Build

> StatsOptimizer should return no rows on empty table with group by
> -----------------------------------------------------------------
>
>                 Key: HIVE-13452
>                 URL: https://issues.apache.org/jira/browse/HIVE-13452
>             Project: Hive
>          Issue Type: Bug
>          Components: Logical Optimizer
>            Reporter: Ashutosh Chauhan
>            Assignee: Pengcheng Xiong
>         Attachments: HIVE-13452.01.patch
>
>
> {code}
> create table t1 (a int);
> analyze table t1 compute statistics;
> analyze table t1 compute statistics for columns;
> select count(1) from t1 group by 1;
> set hive.compute.query.using.stats=true;
> select count(1) from t1 group by 1;
> {code}
> In both cases result set should be empty. However, with statsoptimizer on Hive returns
one row with value 0.



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