Cheng Lian created SPARK-9407:
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Summary: Parquet shouldn't push down predicates over a column
whose underlying Parquet type is an ENUM
Key: SPARK-9407
URL: https://issues.apache.org/jira/browse/SPARK-9407
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 1.5.0
Reporter: Cheng Lian
Assignee: Cheng Lian
Priority: Blocker
Spark SQL doesn't have an equivalent data type to Parquet {{BINARY (ENUM)}},
and always treats it as a UTF-8 encoded {{StringType}}. Thus, predicate over a
Parquet {{ENUM}} column may be pushed down. However, Parquet 1.7.0 and prior
versions only support filter push-down optimization for [a limited set of data
types|https://github.com/apache/parquet-mr/blob/apache-parquet-1.7.0/parquet-column/src/main/java/org/apache/parquet/filter2/predicate/ValidTypeMap.java#L66-L80],
and fails the query.
The simplest solution seems to be upgrading parquet-mr to 1.8.1, which fixes
this issue via PARQUET-201
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