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ASF GitHub Bot updated ARROW-13580: ----------------------------------- Labels: pull-request-available (was: ) > [C++] quoted_strings_can_be_null only applied to string columns > --------------------------------------------------------------- > > Key: ARROW-13580 > URL: https://issues.apache.org/jira/browse/ARROW-13580 > Project: Apache Arrow > Issue Type: Bug > Components: C++ > Reporter: Weston Pace > Assignee: Weston Pace > Priority: Major > Labels: pull-request-available > Time Spent: 10m > Remaining Estimate: 0h > > My interpretation of the "string" in quoted_strings_can_be_null is that it is > referring to the unparsed CSV input string and not the actual output data > type. > So when converting: > {code:csv} > "one","two","three" > "1","2","3" > "4","","6"' > {code} > We should get... > [1, 4], [2, None], [3, 6] > ...currently we get... > [1, 4], ['2', None], [3, 6] > In pandas the above string parses to... > {code:python} > >>> f = io.BytesIO(b'"one","two","three"\n"1","2","3"\n"4","","6"') > >>> pandas.read_csv(f) > one two three > 0 1 2.0 3 > 1 4 NaN 6 > {code} > So this is bringing us closer to pandas which is probably a good thing. > Inspired by: https://github.com/apache/arrow/issues/10892 -- This message was sent by Atlassian Jira (v8.3.4#803005)