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  1. Apache HAWQ
  2. HAWQ-1228

Use profile based on file format in HCatalog integration(HiveRC, HiveText profiles)

    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 2.1.0.0-incubating
    • Component/s: PXF
    • Labels:
      None

      Description

      To leverage changes introduced in HAWQ-1177, expand optimization for other Hive profiles. Additional information needs to be included in user metadata(e.g. DELIMITER etc).

      Changes needed:

      • Enhance the Metadata API, to add new attributes: outputFormats, outputParameters;
      • Hive, HiveORC profiles should support just GPDBWritable format;
      • HIveText, HiveRC profiles should support both TEXT and GPDBWritable formats;
      • Unify HiveUserData data structures to be same among all Hive- profiles;
      • Bridge should read fragments using optimal profile read from fragment information;
      • Optimal profile should be determined based on file's input format(org.apache.hadoop.hive.ql.io.orc.OrcInputFormat - HiveORC, org.apache.hadoop.hive.ql.io.RCFileInputFormat - HiveRC, org.apache.hadoop.mapred.TextInputFormat - HiveText);
      • Default profile is Hive;
      • If Hive table has org.apache.hadoop.mapred.TextInputFormat but also has some comlex types - Hive profile should be used(limitation should be addressed in HAWQ-1265);
      • If table is homogeneous(all input file have the same output format) Bridge uses the same format which table has. Otherwise, if table is heterogeneous, GPDBWritable should be used;
      • Add new property outputFormat to pxf-profiles-default.xml, which means default output format of profile.

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              • Assignee:
                odiachenko Oleksandr Diachenko
                Reporter:
                odiachenko Oleksandr Diachenko
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                • Created:
                  Updated:
                  Resolved: