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  1. Hive
  2. HIVE-5726

The DecimalTypeInfo instance associated with a decimal constant is not in line with the precision/scale of the constant

    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.13.0
    • Component/s: None
    • Labels:
      None

      Description

      Currently Hive uses a default decimal type info instance to associate with a decimal constant in the expression tree. To precisely determine the precision/scale of the expression result requires more accurate precision/scale of the type of the decimal constant. Thus, Hive uses a precision/scale of the constant for the type info instance. As an example, the following is not desirable:

      hive> create table mytable as select 3.14BD as t from person_age limit 1;
      hive> desc mytable;
      OK
      t                   	decimal(65,30)      	None                
      Time taken: 0.08 seconds, Fetched: 1 row(s)
      

      instead, the precision/scale for t above should be (3, 2).

        Attachments

        1. HIVE-5726.patch
          4 kB
          Xuefu Zhang
        2. HIVE-5726.1.patch
          6 kB
          Xuefu Zhang
        3. HIVE-5726.2.patch
          7 kB
          Xuefu Zhang

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              • Assignee:
                xuefuz Xuefu Zhang
                Reporter:
                xuefuz Xuefu Zhang
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                • Created:
                  Updated:
                  Resolved: