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Posted to issues@arrow.apache.org by GitBox <gi...@apache.org> on 2023/01/02 15:43:35 UTC

[GitHub] [arrow] OfekShilon opened a new issue, #15154: Failing to write_feather an R data.frame with column of mixed lists and NA

OfekShilon opened a new issue, #15154:
URL: https://github.com/apache/arrow/issues/15154

   ### Describe the bug, including details regarding any error messages, version, and platform.
   
   This works:
   ```r
   > df <- data.frame(a=1:4, b=I(list(1,1:2,1:3,1:4)))
   > arrow::write_feather(x=df, sink = "~/tmp/t1")
   ```
   
   While this fails:
   ```r
   > df <- data.frame(a=1:4, b=I(list(1,1:2,1:3,NA)))
   > arrow::write_feather(x=df, sink = "~/tmp/t2")
   Error: Invalid: cannot convert
   ```
   
   ### Component(s)
   
   R


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[GitHub] [arrow] thisisnic commented on issue #15154: [R] Failing to write_feather an R data.frame with column of mixed lists and NA

Posted by "thisisnic (via GitHub)" <gi...@apache.org>.
thisisnic commented on issue #15154:
URL: https://github.com/apache/arrow/issues/15154#issuecomment-1641786064

   I don't think this is something we can support; part of the process of writing a data.frame to a Feather file involves converting from R data.frame to Arrow Table, which also involves converting the types.  Given the purpose of the AsIs class is to prevent converting to another type, I don't see how/why we'd support this. Happy to consider other perspectives though.


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[GitHub] [arrow] OfekShilon commented on issue #15154: Failing to write_feather an R data.frame with column of mixed lists and NA

Posted by GitBox <gi...@apache.org>.
OfekShilon commented on issue #15154:
URL: https://github.com/apache/arrow/issues/15154#issuecomment-1369479111

   All-NA columns also work:
   ```r
   df <- data.frame(a=1:4, b=NA)
   arrow::write_feather(x=df, sink = "~/tmp/t3")
   ```
   just mixed data/NA break.


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[GitHub] [arrow] thisisnic closed issue #15154: [R] Failing to write_feather an R data.frame with column of mixed lists and NA

Posted by "thisisnic (via GitHub)" <gi...@apache.org>.
thisisnic closed issue #15154: [R] Failing to  write_feather an R data.frame with column of mixed lists and NA
URL: https://github.com/apache/arrow/issues/15154


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