Github user rxin commented on a diff in the pull request: https://github.com/apache/spark/pull/1346#discussion_r15511457 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/parquet/ParquetTypes.scala --- @@ -140,10 +142,12 @@ private[parquet] object ParquetTypesConverter extends Logging { assert(keyValueGroup.getFields.apply(0).getRepetition == Repetition.REQUIRED) val valueType = toDataType(keyValueGroup.getFields.apply(1)) assert(keyValueGroup.getFields.apply(1).getRepetition == Repetition.REQUIRED) - new MapType(keyType, valueType) + // TODO: set valueContainsNull explicitly instead of assuming valueContainsNull is true + // at here. + MapType(keyType, valueType) } else if (correspondsToArray(groupType)) { // ArrayType val elementType = toDataType(groupType.getFields.apply(0)) - new ArrayType(elementType) + ArrayType(elementType, false) --- End diff -- here too
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