imay commented on issue #1652: support filter with predicate in BetaRowset
URL: 
https://github.com/apache/incubator-doris/issues/1652#issuecomment-527842993
 
 
   @gaodayue 
   > If you mean filter rows by columns's zonemap, it's already supported
   
   I mean that vectorized predicate filter. In AlphaRowset, this logic locates 
in ColumnData, we should support it in SegmentIterator to filter data as soon 
as possible.

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