compared to java ORC, Velox has a more significant read amplification issue #493
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zhaiyuyong0412-dot
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@zhaiyuyong0412-dot Do you have a test file and plan we can reproduce? |
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The Java ORC logic first filters out the position of each row group based on the pushdown conditions, and then performs a merge
However, when Velox reads from Orc, the row group skip function becomes ineffective when multiple columns are merged
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