Github user liancheng commented on a diff in the pull request: https://github.com/apache/spark/pull/14278#discussion_r71671818 --- Diff: sql/core/src/main/java/org/apache/spark/sql/execution/datasources/parquet/SpecificParquetRecordReaderBase.java --- @@ -136,7 +137,9 @@ public void initialize(InputSplit inputSplit, TaskAttemptContext taskAttemptCont ReadSupport.ReadContext readContext = readSupport.init(new InitContext( taskAttemptContext.getConfiguration(), toSetMultiMap(fileMetadata), fileSchema)); this.requestedSchema = readContext.getRequestedSchema(); - this.sparkSchema = new ParquetSchemaConverter(configuration).convert(requestedSchema); + String sparkRequestedSchemaString = + configuration.get(ParquetReadSupport$.MODULE$.SPARK_ROW_REQUESTED_SCHEMA()); + this.sparkSchema = StructType$.MODULE$.fromString(sparkRequestedSchemaString); --- End diff -- Actually it's safer when the Parquet requested schema conforms to the actual physical file to be read. Normally, we shouldn't care about logical types (those with annotations) at the level of Parquet record reader. It's the upper level engine's responsibility to convert basic types like `int32` into logical types like `INT_8` and `INT_16`. The vectorized reader has to mix them up because we need to construct value vectors of proper types at this level.
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