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Posted to issues@arrow.apache.org by "tahsinreza (via GitHub)" <gi...@apache.org> on 2023/03/16 19:59:30 UTC

[GitHub] [arrow] tahsinreza opened a new issue, #34594: How to read Decimal type in Stream Reader C++ API

tahsinreza opened a new issue, #34594:
URL: https://github.com/apache/arrow/issues/34594

   ### Describe the usage question you have. Please include as many useful details as  possible.
   
   
   I'm trying to read the following field in a parquet file using the Stream Reader C++ API (I didn't create the parquet file):
   
   Schema output:
   optional fixed_len_byte_array(16) field_id=-1 processstarted_seconds (Decimal(precision=38, scale=18));
   
   // code
   optional<std::array<char, 16>> processstarted_seconds;
   ... 
   stream_reader >> columns_obj.processstarted_seconds;
   // code
   
   When I run the above code, I get the following runtime error message:
   what():  Column converted type mismatch.  Column 'processstarted_seconds' has converted type 'DECIMAL' not 'NONE'
   
   The error is originating here: https://github.com/apache/arrow/blob/main/cpp/src/parquet/stream_reader.cc#L158
   
   Note that I'm able to read the FIXED_LEN_BYTE_ARRAY type with parquet::ConvertedType::NONE. For example, the following works fine.
   Schema output:
   optional fixed_len_byte_array(4) field_id=-1 country_char[4];
   
   Thanks for your help.
   
   
   ### Component(s)
   
   C++


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[GitHub] [arrow] mapleFU commented on issue #34594: [C++][Parquet] How to read Decimal type in Stream Reader C++ API

Posted by "mapleFU (via GitHub)" <gi...@apache.org>.
mapleFU commented on issue #34594:
URL: https://github.com/apache/arrow/issues/34594#issuecomment-1595661472

   According to https://github.com/apache/arrow/issues/34633#issuecomment-1595655286
   Can this issue be closed?


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[GitHub] [arrow] wgtmac commented on issue #34594: [C++][Parquet] How to read Decimal type in Stream Reader C++ API

Posted by "wgtmac (via GitHub)" <gi...@apache.org>.
wgtmac commented on issue #34594:
URL: https://github.com/apache/arrow/issues/34594#issuecomment-1491377823

   This is a duplicate issue: https://github.com/apache/arrow/issues/34633
   
   If the related patch solves the problem, please feel free to close this one.
   
   Let me know if you have any question.


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[GitHub] [arrow] tahsinreza commented on issue #34594: [C++][Parquet] How to read Decimal type in Stream Reader C++ API

Posted by "tahsinreza (via GitHub)" <gi...@apache.org>.
tahsinreza commented on issue #34594:
URL: https://github.com/apache/arrow/issues/34594#issuecomment-1492304724

   Thanks for letting me know. I'll test the updated code next week and get back to you.


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[GitHub] [arrow] wgtmac commented on issue #34594: [C++][Parquet] How to read Decimal type in Stream Reader C++ API

Posted by "wgtmac (via GitHub)" <gi...@apache.org>.
wgtmac commented on issue #34594:
URL: https://github.com/apache/arrow/issues/34594#issuecomment-1595792484

   > According to [#34633 (comment)](https://github.com/apache/arrow/issues/34633#issuecomment-1595655286) Can this issue be closed?
   
   Yes, let me close it.


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[GitHub] [arrow] wgtmac closed issue #34594: [C++][Parquet] How to read Decimal type in Stream Reader C++ API

Posted by "wgtmac (via GitHub)" <gi...@apache.org>.
wgtmac closed issue #34594: [C++][Parquet] How to read Decimal type in Stream Reader C++ API
URL: https://github.com/apache/arrow/issues/34594


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