dongjoon-hyun commented on code in PR #37293:
URL: https://github.com/apache/spark/pull/37293#discussion_r938192500


##########
sql/core/src/main/java/org/apache/spark/sql/execution/datasources/parquet/VectorizedDeltaBinaryPackedReader.java:
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@@ -300,7 +300,8 @@ private void unpackMiniBlock() throws IOException {
         bitWidths[currentMiniBlock]);
     for (int j = 0; j < miniBlockSizeInValues; j += 8) {
       ByteBuffer buffer = in.slice(packer.getBitWidth());
-      packer.unpack8Values(buffer, buffer.position(), unpackedValuesBuffer, j);
+      packer.unpack8Values(buffer.array(),

Review Comment:
   Could you file one for trace-ability in order not to forget, @sunchao ?



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