[jira] [Created] (SPARK-4453) Simplify Parquet record filter generation

["Cheng Lian (JIRA)" <ji...@apache.org>]

Cheng Lian created SPARK-4453:
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             Summary: Simplify Parquet record filter generation
                 Key: SPARK-4453
                 URL: https://issues.apache.org/jira/browse/SPARK-4453
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 1.1.0, 1.0.0
            Reporter: Cheng Lian


Current Parquet record filter code uses {{CatalystFilter}} and its sub-classes to represent all Spark SQL Parquet filter. Essentially, these classes combines the original Catalyst predicate expression together with the generated Parquet filter. {{ParquetFilters.findExpression}} then uses these classes to filter out all expressions that can be pushed down.

However, this {{findExpression}} function is not necessary at the first place, since we already know whether a predicate can be pushed down or not while trying to generate its corresponding filter.

With this in mind, the code size of Parquet record filter generation can be reduced significantly.



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