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  1. Pig
  2. PIG-1788

relation-as-scalar error messages should indicate the field being used as scalar

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.9.0
    • Component/s: None
    • Labels:
      None

      Description

      Issue 1

      grunt> l = load 'x' as (a,b,c);        
      grunt> g = group l by a;
      grunt> f = foreach g generate COUNT(g);       -- g is unintentionally being used as scalar , the user intends it to be COUNT(l) . 
      2011-01-05 12:44:53,098 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1000: Error during parsing. Scalars can be only used with projections
      

      Since the user did not intend to use a scalar, the scalar error messages are hard to understand.
      It will be useful to have the relation being used in scalar context in the error message. Something like - "ERROR 1000: Error during parsing. Relation g being used in scalar context at ... .Scalars can be only used with projections"

      Issue 2
      The error message "Scalars can be only used with projections" is not easy to understand. A better error message is needed, something like "A column needs to be projected from relation used in scalar context."

        Attachments

        1. PIG-1788-3.patch
          3 kB
          Laukik Chitnis
        2. PIG-1788.patch
          0.7 kB
          Laukik Chitnis

          Activity

            People

            • Assignee:
              laukik Laukik Chitnis
              Reporter:
              thejas Thejas M Nair
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              Dates

              • Created:
                Updated:
                Resolved: