dongjoon-hyun commented on a change in pull request #903:
URL: https://github.com/apache/orc/pull/903#discussion_r704069777



##########
File path: c++/src/Reader.cc
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@@ -385,7 +385,7 @@ namespace orc {
 
   void RowReaderImpl::seekToRowGroup(uint32_t rowGroupEntryId) {
     // store positions for selected columns
-    std::vector<std::list<uint64_t>> positions;
+    std::list<std::list<uint64_t>> positions;

Review comment:
       Thank you for the details. Could you add that into the PR description? 
It will be a permanent commit message.




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