[GitHub] [arrow] thisisnic opened a new issue, #35035: [R] Implement `names<-` for Schemas

["thisisnic (via GitHub)" <gi...@apache.org>]

thisisnic opened a new issue, #35035:
URL: https://github.com/apache/arrow/issues/35035

   ### Describe the enhancement requested
   
   We occasionally have requests relating to updating schemas and we could make them easier to work with.  We could implement the S3 method `names<-` for Schema object, to enable users to be able to do something like:
   
   ```
   my_schema <- schema(x = int8(), y = string())
   names(my_schema) <- c("y", "x")
   ```
   The specific use-case I'm thinking about here is when a user wants to read a schema from a source, update it, and then re-use it to read/write.
   
   ### Component(s)
   
   R


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[GitHub] [arrow] nealrichardson commented on issue #35035: [R] Implement `names<-` for Schemas

["nealrichardson (via GitHub)" <gi...@apache.org>]

nealrichardson commented on issue #35035:
URL: https://github.com/apache/arrow/issues/35035#issuecomment-1503577443

   There is a `Schema->WithNames()` method you could add bindings for: https://github.com/apache/arrow/blob/main/cpp/src/arrow/type.h#L2003
   
   Note that the C++ function doesn't seem to preserve schema metadata: https://github.com/apache/arrow/blob/main/cpp/src/arrow/type.cc#L1741-L1754
   
   So you will either need to modify the function there to forward the metadata, or handle it yourself. (And for `metadata$r`, you may want to update column names referenced in that to point to the new names, so it may just be something to handle on the R side anyway.)


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[GitHub] [arrow] thisisnic closed issue #35035: [R] Implement `names<-` for Schemas

["thisisnic (via GitHub)" <gi...@apache.org>]

thisisnic closed issue #35035: [R] Implement `names<-` for Schemas
URL: https://github.com/apache/arrow/issues/35035


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