> 在 2017年4月5日，下午6:31，QiangCai <qiang...@qq.com> 写道： > > Hi all, > > Now we plan to implement delta encoding for the numeric type column in > SORT_COLUMNS. > > 1. use delta encoding to encode the numeric type data >
I think the adaptive data type conversion still apply here, right? > 2. write present metadata to the page header, to record the null value. > > 3. improve the compression on no-dictionary string column. > use RLE to compress the array of the lengths in LV encoding. > I think local dictionary is more suitable for this case > Any thoughts, comments and questions ? > > Best Regards > David QiangCai > > > -- > View this message in context: > http://apache-carbondata-mailing-list-archive.1130556.n5.nabble.com/DISCUSSION-implement-delta-encoding-for-numeric-type-column-in-SORT-COLUMNS-tp10124.html > Sent from the Apache CarbonData Mailing List archive mailing list archive at > Nabble.com.
