dongjoon-hyun commented on code in PR #46485:
URL: https://github.com/apache/spark/pull/46485#discussion_r1596258635


##########
sql/core/src/main/java/org/apache/spark/sql/execution/datasources/parquet/VectorizedColumnReader.java:
##########
@@ -353,8 +353,9 @@ private void initDataReader(
       throw new IOException("could not read page in col " + descriptor, e);
     }
     // for PARQUET-246 (See VectorizedDeltaByteArrayReader.setPreviousValues)
-    if (CorruptDeltaByteArrays.requiresSequentialReads(writerVersion, 
dataEncoding) &&
-        previousReader instanceof RequiresPreviousReader) {
+    if (CorruptDeltaByteArrays.requiresSequentialReads(writerVersion, 
dataEncoding)
+        && previousReader != null
+        && dataColumn instanceof RequiresPreviousReader) {

Review Comment:
   Could you file a JIRA issue, @yutsareva ?



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