[jira] [Created] (HIVE-11234) CBO: Calcite Operator To Hive Operator (Calcite Return Path): reconsider the cross product in HiveJoinToMultiJoinRule

["Pengcheng Xiong (JIRA)" <ji...@apache.org>]

Pengcheng Xiong created HIVE-11234:
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             Summary: CBO: Calcite Operator To Hive Operator (Calcite Return Path): reconsider the cross product in HiveJoinToMultiJoinRule
                 Key: HIVE-11234
                 URL: https://issues.apache.org/jira/browse/HIVE-11234
             Project: Hive
          Issue Type: Sub-task
            Reporter: Pengcheng Xiong


Cross product in HiveJoinToMultiJoinRule needs to be reconsidered. Now the following explain query will fail at L1116 StatsRulesProcFactory : FAILED: IndexOutOfBoundsException Index: 0, Size: 0 because the key in one of the branches of the join is empty.
{code}
explain select *  from src 
where src.key not in (select key  from src1);
{code}

If we run
{code}
select *  from src 
where src.key not in (select key  from src1);
{code}
we will have "FAILED: Execution Error, return code 2 from org.apache.hadoop.hive.ql.exec.mr.MapRedTask". The root cause is the same. Other queries that will also fail include cbo_subq_not_in.q etc.



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