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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2020/10/08 22:20:58 UTC

[GitHub] [arrow] pitrou commented on a change in pull request #8403: ARROW-10237: [C++] Duplicate dict values cause corrupt parquet

pitrou commented on a change in pull request #8403:
URL: https://github.com/apache/arrow/pull/8403#discussion_r502044409



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File path: cpp/src/parquet/arrow/arrow_reader_writer_test.cc
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@@ -2689,6 +2689,26 @@ TEST(TestArrowReadWrite, DictionaryColumnChunkedWrite) {
   ::arrow::AssertTablesEqual(*expected_table, *result, false);
 }
 
+TEST(TestArrowReadWrite, NonUniqueDictionaryValues) {
+  // ARROW-10237
+  auto dict_with_dupes = ArrayFromJSON(::arrow::utf8(), R"(["a", "a", "b"])");
+  auto indices = ArrayFromJSON(::arrow::int32(), R"([0, 1, 0, 1])");

Review comment:
       You might want to check all possible index values.




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