[jira] [Created] (SPARK-17868) Do not use bitmasks during parsing and analysis of CUBE/ROLLUP/GROUPING SETS

["Herman van Hovell (JIRA)" <ji...@apache.org>]

Herman van Hovell created SPARK-17868:
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             Summary: Do not use bitmasks during parsing and analysis of CUBE/ROLLUP/GROUPING SETS
                 Key: SPARK-17868
                 URL: https://issues.apache.org/jira/browse/SPARK-17868
             Project: Spark
          Issue Type: Improvement
          Components: SQL
            Reporter: Herman van Hovell
            Assignee: Herman van Hovell


We generate bitmasks for grouping sets during the parsing process, and use these during analysis. These bitmasks are difficult to work with in practice and have lead to numerous bugs. I suggest that we remove these and use actual sets instead, however we would need to generate these offsets for the grouping_id.



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