Riza Suminto created IMPALA-14027:
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Summary: Reimplement HS2 NULL_TYPE using TStringValue
Key: IMPALA-14027
URL: https://issues.apache.org/jira/browse/IMPALA-14027
Project: IMPALA
Issue Type: Improvement
Components: Frontend
Reporter: Riza Suminto
HS2 NULL_TYPE should be implemented using TStringValue.
[https://github.com/apache/impala/blob/master/common/thrift/hive-1-api/TCLIService.thrift#L327]
However, due to incompatibility with Hive JDBC driver implementation then,
Impala choose to implement NULL type using TBoolValue (see IMPALA-914,
IMPALA-1370).
The Hive JDBC issue is not there anymore. Thus, we can reimplement NULL_TYPE
using TStringValue to match HiveServer2 behavior.
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