cloud-fan commented on issue #24068: [SPARK-27105][SQL] Optimize away exponential complexity in ORC predicate conversion URL: https://github.com/apache/spark/pull/24068#issuecomment-475728899 1. ah yes, that's better! We don't need a new tree-like representation, just reuse the Spark filter tree, with unconvertible part trimmed. 2. The idea is to traverse the tree only twice: one for trimming unconvertible filters, one for building orc filters.
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