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Posted to dev@parquet.apache.org by "Tim Chan (JIRA)" <ji...@apache.org> on 2015/05/30 05:39:17 UTC

[jira] [Created] (PARQUET-295) Filter predicate should be able to filter on columns not specified in projection pushdown

Tim Chan created PARQUET-295:
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             Summary: Filter predicate should be able to filter on columns not specified in projection pushdown
                 Key: PARQUET-295
                 URL: https://issues.apache.org/jira/browse/PARQUET-295
             Project: Parquet
          Issue Type: Improvement
          Components: parquet-mr
    Affects Versions: 1.6.0
            Reporter: Tim Chan
            Priority: Minor


When using both filter predicate and projection pushdown of columns, the column specified in the filter predicate, should not have to be specified in the projection pushdown. 

For example, if I want the first names of students that are over the age of 16, then I should be able to specify ParquetInputFormat.setFilterPredicate(jobConf, IntColumn("age") > 16) and only have to specify ThriftReadSupport.setProjectionPushdown(jobConf, "fname")




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