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From omalley <...@git.apache.org>
Subject [GitHub] orc pull request #247: ORC-339. Reorganize the ORC file format specification...
Date Tue, 17 Apr 2018 16:13:34 GMT
Github user omalley commented on a diff in the pull request:

    https://github.com/apache/orc/pull/247#discussion_r182138208
  
    --- Diff: site/specification/ORCv2.md ---
    @@ -0,0 +1,1032 @@
    +---
    +layout: page
    +title: Evolving Draft for ORC Specification v2
    +---
    +
    +This specification is rapidly evolving and should only be used for
    +developers on the project.
    +
    +# TO DO items
    +
    +The list of things that we plan to change:
    +
    +* Create a decimal representation with fixed scale using rle.
    +* Create a better float/double encoding that splits mantissa and
    +  exponent.
    +* Create a dictionary encoding for float, double, and decimal.
    +* Create RLEv3:
    +   * 64 and 128 bit variants
    --- End diff --
    
    No, I mean that the new RLEv3 needs to support both 64 bit and 128 bit integers. The specification
of course could just define the spec using 128 bits, but the Java and C++ implementation would
likely be split.


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