Hive
  1. Hive
  2. HIVE-5277

HBase handler skips rows with null valued first cells when only row key is selected

    Details

    • Type: Bug Bug
    • Status: Patch Available
    • Priority: Major Major
    • Resolution: Unresolved
    • Affects Version/s: 0.11.0, 0.11.1, 0.12.0, 0.13.0
    • Fix Version/s: None
    • Component/s: HBase Handler
    • Labels:
      None

      Description

      HBaseStorageHandler skips rows with null valued first cells when only row key is selected.

      SELECT key, col1, col2 FROM hbase_table;
      key1	cell1	cell2 
      key2	NULL	cell3
      
      SELECT COUNT(key) FROM hbase_table;
      1
      

      HiveHBaseTableInputFormat.getRecordReader makes first cell selected to avoid skipping rows. But when the first cell is null, HBase skips that row.

      http://hbase.apache.org/book/perf.reading.html 12.9.6. Optimal Loading of Row Keys describes how to deal with this problem.

      I tried to find an existing issue, but I couldn't. If you find a same issue, please make this issue duplicated.

      1. HIVE-5277.2.patch.txt
        7 kB
        Teddy Choi
      2. HIVE-5277.1.patch.txt
        7 kB
        Teddy Choi

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          People

          • Assignee:
            Teddy Choi
            Reporter:
            Teddy Choi
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            Dates

            • Created:
              Updated:

              Development