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  1. Atlas
  2. ATLAS-2975

Hive hook generates duplicate column_lineage entities

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 1.0.0, 0.8.3, 1.1.0
    • Fix Version/s: 0.8.4, 1.2.0, 2.0.0
    • Component/s: atlas-intg
    • Labels:
      None

      Description

      Hive hook is expected to create one column-lineage entity for each column in the output table. However, for each output column, hive hook might generates multiple column-lineage entities when multiple partitions are involved - one entity for each partition. This can end up with large number of duplciate column-lineage entities, depending on the number of partitions. Such duplicate entities should be avoided.

      Here is the sample HSQL to repro this issue:

      CREATE TABLE visitors(name STRING, dob DATE) PARTITIONED BY (yob INT);
      CREATE TABLE visitors_log(name STRING, dob DATE);
      
      INSERT INTO TABLE visitors_log VALUES('John',  '1980-08-08'),
                                           ('Jack',  '1980-09-09'),
                                           ('Kevin', '1990-10-10'),
                                           ('Ken',   '1990-11-11'),
                                           ('Larry', '1995-12-12');
      
      SET hive.exec.dynamic.partition.mode=nonstrict;
      
      INSERT INTO TABLE visitors PARTITION(yob) SELECT name, dob, YEAR(dob) yob FROM visitors_log;
      

      In above case, columns visitors.name and visitors.dob will have 3 input lineage - one for each partition 1980, 1990 and 1995.

        Attachments

        1. ATLAS-2975-master.patch
          7 kB
          Madhan Neethiraj

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            • Assignee:
              madhan Madhan Neethiraj
              Reporter:
              madhan Madhan Neethiraj
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              Dates

              • Created:
                Updated:
                Resolved: