Github user omalley commented on a diff in the pull request: https://github.com/apache/orc/pull/151#discussion_r132734767 --- Diff: c++/include/orc/Reader.hh --- @@ -288,6 +288,17 @@ namespace orc { virtual uint64_t getCompressionSize() const = 0; /** + * Get ID of writer that generated the file. + * Current availiable Orc writers: + * 0 = ORC Java + * 1 = ORC C++ + * 2 = Presto + * @param id out parameter for writer id + * @return true if writer id is availiable, false if otherwise + */ + virtual bool getWriterId(uint32_t & id) const = 0; --- End diff -- Re-reading your question, I should clarify that the Presto writer hasn't been released yet.
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