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From kumarvishal09 <...@git.apache.org>
Subject [GitHub] incubator-carbondata issue #635: [WIP]support SORT_COLUMNS
Date Fri, 10 Mar 2017 07:03:33 GMT
Github user kumarvishal09 commented on the issue:

    https://github.com/apache/incubator-carbondata/pull/635
  
    @QiangCai I have queries related to this PR.
    1. If user has not mentioned any sort column then it will go to old flow (sorting based
on all dimension column) or data wont be sorted ?
    2. If data is not sorted We cannot use B+ tree we need to use some other linear data structure
like array or linked list, i have not seen any changes related to this.
    2. Btree is created based on sort column, so based on this pr we need to update the btree
loading as only sort column will participate on creating the Btree.
    3. How you creating start key and end key as only sort column can participate on both
the keys. Btree jump will not work if other columns (except sort columns) are participating
in start and end key.



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