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Posted to issues@spark.apache.org by "Gengliang Wang (JIRA)" <ji...@apache.org> on 2019/05/14 09:42:00 UTC

[jira] [Created] (SPARK-27699) Partially push down disjunctive predicated in Parquet/Orc

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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