Naresh P R created HIVE-21837:
---------------------------------
Summary: MapJoin is throwing exception when selected column is
having completely null values
Key: HIVE-21837
URL: https://issues.apache.org/jira/browse/HIVE-21837
Project: Hive
Issue Type: Bug
Reporter: Naresh P R
Assignee: Naresh P R
With huge data, below query
{code:java}
SELECT
a.id,
null
FROM table a
JOIN table b ON (a.id = b.id)
JOIN (SELECT '1234' id, 'deptno' type UNION ALL SELECT '5678' id, 'deptno'
type) c ON (c.type = a.type){code}
is throwing below exception.
{code:java}
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Column vector
class org.apache.hadoop.hive.ql.exec.vector.VoidColumnVector is not supported!
at
org.apache.hadoop.hive.ql.exec.vector.VectorizedBatchUtil.makeLikeColumnVector(VectorizedBatchUtil.java:624)
at
org.apache.hadoop.hive.ql.exec.vector.VectorizedBatchUtil.makeLike(VectorizedBatchUtil.java:861)
at
org.apache.hadoop.hive.ql.exec.vector.mapjoin.VectorMapJoinCommonOperator.commonSetup(VectorMapJoinCommonOperator.java:583)
at
org.apache.hadoop.hive.ql.exec.vector.mapjoin.VectorMapJoinGenerateResultOperator.commonSetup(VectorMapJoinGenerateResultOperator.java:128)
at
org.apache.hadoop.hive.ql.exec.vector.mapjoin.VectorMapJoinInnerGenerateResultOperator.commonSetup(VectorMapJoinInnerGenerateResultOperator.java:112)
at
org.apache.hadoop.hive.ql.exec.vector.mapjoin.VectorMapJoinInnerMultiKeyOperator.process(VectorMapJoinInnerMultiKeyOperator.java:119)
... 21 more{code}
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