dongjoon-hyun commented on a change in pull request #990:
URL: https://github.com/apache/orc/pull/990#discussion_r781666272
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File path: c++/include/orc/Reader.hh
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@@ -149,6 +149,25 @@ namespace orc {
*/
RowReaderOptions& includeTypes(const std::list<uint64_t>& types);
+ /**
+ * A map type of <typeId, ReadIntent>.
+ */
+ typedef std::map<uint64_t, ReadIntent> TypeReadIntents;
+
+ /**
+ * Selects which type ids to read and specific ReadIntents for each
+ * type id. The root type is always 0 and the rest of the types are
Review comment:
`root type is always 0` might sound weird. Technically, `root type ID is
always 0`.
BTW, I'd like to recommend to remove this sentence, `The root type is always
0 and the rest of the types are labeled in a preorder traversal of the tree`
because this is redundant.
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