chaoyli commented on issue #2953: [segment_v2] Switch to Unified and Extensible Page Format URL: https://github.com/apache/incubator-doris/pull/2953#issuecomment-590019622 2. I think ZoneMap and OrdinalIndex Read/Writer logic remaining the same may be better. Firstly ZoneMap and OrdinalIndex is simple, may not need to used IndexedColumnWriter/Reader complicated logic. Secondly IndexedColumnWriter will also contain all index writer, if we add BTree index in the futher. Thirdly if use the above optimization, the ZoneMap and OrdinalIndex also not suitable.
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