Hive
  1. Hive
  2. HIVE-2248

Comparison Operators convert number types to common type instead of double if possible

    Details

    • Type: Bug Bug
    • Status: Closed
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.8.0
    • Component/s: Query Processor
    • Labels:
      None
    • Hadoop Flags:
      Reviewed

      Description

      Now if the two sides of comparison is of different type, we always convert both to double and compare. It was a slight regression from the change in https://issues.apache.org/jira/browse/HIVE-1638. The old UDFOP<Comparison>, using GenericUDFBridge, always tried to find common type first.

      The worse case is this: If you did "WHERE <BIGINT_COLUMN> = 0 ", we always convert the column and 0 to double and compare, which is wasteful, though it is usually a minor costs in the system. But it is easy to fix.

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          People

          • Assignee:
            Siying Dong
            Reporter:
            Siying Dong
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            Dates

            • Created:
              Updated:
              Resolved:

              Development