difin commented on code in PR #6106:
URL: https://github.com/apache/hive/pull/6106#discussion_r2388627623
##########
ql/src/java/org/apache/hadoop/hive/ql/io/parquet/vector/VectorizedParquetRecordReader.java:
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@@ -519,20 +519,19 @@ private VectorizedColumnReader
buildVectorizedParquetReader(
int depth) throws IOException {
List<ColumnDescriptor> descriptors =
getAllColumnDescriptorByType(depth, type, columnDescriptors);
+ // Support for schema evolution
+ if (!fileSchema.getColumns().contains(descriptors.get(0))) {
+ return new VectorizedDummyColumnReader();
Review Comment:
It would be good if the comment explained how/why it provides support for
schema evolution.
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