gaodayue opened a new issue #2025: V2 Format: Support lazy open ColumnReader URL: https://github.com/apache/incubator-doris/issues/2025 Currently `segment_v2::Segment::open` will eagerly initialize all column readers, regardless of whether the column is queried or not. Initializing `segment_v2::ColumnReader` incurs additional I/O cost to read ordinal index and zonemap index and should be delayed to the time it's needed.
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