mymeiyi opened a new pull request, #65907:
URL: https://github.com/apache/doris/pull/65907

   Problem Summary: 
   Single-rowset grouped compaction introduces rowsets whose segments are 
non-overlapping only within recorded groups. 
   This pr support record the partial segments nonoverlap relation in 
`segment_group_sizes` in `RowsetMetaPB`(Each value is the number of consecutive 
output segments in one non-overlapping group.) and 
`NONOVERLAPPING_WITHIN_GROUP` in `SegmentsOverlapPB`.
   And in `VerticalBlockReader`, only read the first segment in the each group 
to reduce memory.
   This pr is based on https://github.com/apache/doris/pull/65854


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