Spark 之 Complex Type

sql/core/src/main/java/org/apache/spark/sql/execution/datasources/parquet/VectorizedParquetRecordReader.java

for (int i = 0; i < requestedSchema.getFieldCount(); ++i) {
      Type t = requestedSchema.getFields().get(i);
      if (!t.isPrimitive() || t.isRepetition(Type.Repetition.REPEATED)) {
        throw new UnsupportedOperationException("Complex types not supported.");
      }

isPrimitive 是parquet 里面的type 类型接口