[GitHub] [spark] gengliangwang opened a new pull request #24598: [SPARK-27699][SQL] Partially push down disjunctive predicated in Parquet/ORC

[GitBox <gi...@apache.org>]

gengliangwang opened a new pull request #24598: [SPARK-27699][SQL] Partially push down disjunctive predicated in Parquet/ORC
URL: https://github.com/apache/spark/pull/24598
 
 
   ## What changes were proposed in this pull request?
   
   Currently, in `ParquetFilters` and `OrcFilters`, if the child predicate of `Or` operator can't be entirely pushed down, the predicates will be thrown away. 
   In fact, the conjunctive predicates under `Or` operators can be partially pushed down.
   For example, says `a` and `b` are convertible, while `c` can't be pushed down, the predicate
   `a or (b and c)` 
   can be converted as 
   `(a or b) and (a or c)`
   We can still push down `(a or b)`.
   We can't push down disjunctive predicates only when one of its children is not partially convertible.
   
   ## How was this patch tested?
   
   Unit test

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