Hive
  1. Hive
  2. HIVE-3211

Enhance hbase column mapping strategy to support complicated structures

    Details

    • Type: Improvement Improvement
    • Status: Open
    • Priority: Major Major
    • Resolution: Unresolved
    • Affects Version/s: 0.9.0
    • Fix Version/s: None
    • Component/s: HBase Handler
    • Labels:
      None

      Description

      With the current Hive-HBase integration, we need to specify the "hbase.columns.mapping" property that maps the hbase columns to the columns in hive. So for example,

      hive> CREATE EXTERNAL TABLE complex(
      key string, 
      s struct<col1 : int, col2 : int>)
      STORED BY 'org.apache.hadoop.hive.hbase.HBaseStorageHandler'
      WITH SERDEPROPERTIES (
      "hbase.columns.mapping" = ":key,cf:a"
      )TBLPROPERTIES ("hbase.table.name" = "TEST_TABLE");;
      

      The struct definition in the above query can quickly get very ugly if we are dealing with a very complicated structures stored in hbase columns. We should probably enhance the current columns mapping strategy to be able to provide a custom serializer and let it detect the structure by itself.

        Issue Links

          Activity

          Hide
          Nick Dimiduk added a comment -

          Please have a look at HBASE-10091. I don't know if the mapping can be automatically detected, but I think HBase can provide a reasonable type description language for users.

          Show
          Nick Dimiduk added a comment - Please have a look at HBASE-10091 . I don't know if the mapping can be automatically detected, but I think HBase can provide a reasonable type description language for users.

            People

            • Assignee:
              Swarnim Kulkarni
              Reporter:
              Swarnim Kulkarni
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              Dates

              • Created:
                Updated:

                Development