Alessandro Solimando created HIVE-26772:
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Summary: Add support for specific column statistics to ANALYZE
TABLE command
Key: HIVE-26772
URL: https://issues.apache.org/jira/browse/HIVE-26772
Project: Hive
Issue Type: Improvement
Components: Parser, Statistics
Affects Versions: 4.0.0-alpha-2
Reporter: Alessandro Solimando
Currently column statistics for table/partitions can be computed in an
all-or-nothing fashion by the "ANALYZE TABLE $tableName COMPUTE STATISTICS FOR
COLUMNS" command.
We propose to improve granularity and support the request to compute a single
kind of statistics, BIT_VECTOR for instance.
The new syntax could be "ANALYZE TABLE $tableName COMPUTE $statsKind STATISTICS
FOR COLUMNS".
In the case of BIT_VECTOR this would translate into "ANALYZE TABLE $tableName
COMPUTE BIT_VECTOR STATISTICS FOR COLUMNS".
The change would require to extend the parser and the statistics computation
logic.
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