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  1. Hive
  2. HIVE-819

Add lazy decompress ability to RCFile

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    • Hadoop Flags:
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      Description

      This is especially useful for a filter scanning.
      For example, for query 'select a, b, c from table_rc_lazydecompress where a>1;' we only need to decompress the block data of b,c columns when one row's column 'a' in that block satisfies the filter condition.

        Attachments

        1. hive-819-2009-11-1.patch
          20 kB
          He Yongqiang
        2. hive-819-2009-9-21.patch
          17 kB
          He Yongqiang
        3. hive-819-2009-9-12.patch
          14 kB
          He Yongqiang

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            • Assignee:
              he yongqiang He Yongqiang
              Reporter:
              he yongqiang He Yongqiang
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