[GitHub] [arrow] pitrou commented on a change in pull request #8318: ARROW-10150: [C++] Fix crashes on invalid Parquet file

[GitBox <gi...@apache.org>]

pitrou commented on a change in pull request #8318:
URL: https://github.com/apache/arrow/pull/8318#discussion_r498354560



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File path: cpp/src/parquet/arrow/schema.cc
##########
@@ -693,10 +693,12 @@ Status ApplyOriginalStorageMetadata(const Field& origin_field, SchemaField* infe
   auto origin_type = origin_field.type();
   auto inferred_type = inferred->field->type();
 
-  if (inferred_type->id() == ::arrow::Type::TIMESTAMP) {
+  if (origin_type->id() == ::arrow::Type::TIMESTAMP &&
+      inferred_type->id() == ::arrow::Type::TIMESTAMP) {
     // Restore time zone, if any
-    const auto& ts_type = static_cast<const ::arrow::TimestampType&>(*inferred_type);
-    const auto& ts_origin_type = static_cast<const ::arrow::TimestampType&>(*origin_type);
+    const auto& ts_type = checked_cast<const ::arrow::TimestampType&>(*inferred_type);
+    const auto& ts_origin_type =
+        checked_cast<const ::arrow::TimestampType&>(*origin_type);

Review comment:
       Well, it's useful to have a debug mode check, IMHO.




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