Gengliang Wang created SPARK-27699:
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Summary: Partially push down disjunctive predicated in Parquet/Orc
Key: SPARK-27699
URL: https://issues.apache.org/jira/browse/SPARK-27699
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.0.0
Reporter: Gengliang Wang
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)`.
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