Gengliang Wang created SPARK-23624:

             Summary: Revise doc of method pushFilters
                 Key: SPARK-23624
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 2.3.1
            Reporter: Gengliang Wang

Revise doc of method pushFilters in 

In `FileSourceStrategy`,  except `partitionKeyFilters`(the references of which 
is subset of partition keys), all filters needs to be evaluated after scanning. 
Otherwise, Spark will get wrong result from data sources like Orc/Parquet.


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