support grouping on complex types in Hive
-----------------------------------------
Key: HIVE-2223
URL: https://issues.apache.org/jira/browse/HIVE-2223
Project: Hive
Issue Type: New Feature
Reporter: Kate Ting
Priority: Minor
Creating a query with a GROUP BY statement when an array type column is part of
the column list is not yet supported:
CREATE TABLE test_group_by ( key INT, group INT, terms ARRAY<STRING>);
SELECT key, terms, count(group) FROM test_group_by GROUP BY key, terms;
...
"Hash code on complex types not supported yet."
java.lang.RuntimeException: Error while closing operators
at org.apache.hadoop.hive.ql.exec.ExecMapper.close(ExecMapper.java:232)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:57)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:356)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
at org.apache.hadoop.mapred.Child.main(Child.java:170)
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException:
java.lang.RuntimeException: Hash code on complex types not supported yet.
at
org.apache.hadoop.hive.ql.exec.GroupByOperator.closeOp(GroupByOperator.java:799)
at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:462)
at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:470)
at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:470)
at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:470)
at org.apache.hadoop.hive.ql.exec.ExecMapper.close(ExecMapper.java:211)
... 4 more
Caused by: java.lang.RuntimeException: Hash code on complex types not supported
yet.
at
org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils.hashCode(ObjectInspectorUtils.java:348)
at
org.apache.hadoop.hive.ql.exec.ReduceSinkOperator.processOp(ReduceSinkOperator.java:187)
at org.apache.hadoop.hive.ql.exec.Operator.process(Operator.java:386)
at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:598)
at
org.apache.hadoop.hive.ql.exec.GroupByOperator.forward(GroupByOperator.java:746)
at
org.apache.hadoop.hive.ql.exec.GroupByOperator.closeOp(GroupByOperator.java:780)
... 9 more
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