[GitHub] [arrow-rs] alamb opened a new issue, #1934: Add builder style methods to `Field`

[GitBox <gi...@apache.org>]

alamb opened a new issue, #1934:
URL: https://github.com/apache/arrow-rs/issues/1934

   **Is your feature request related to a problem or challenge? Please describe what you are trying to do.**:
   I want to make a field Nullable as part of outer joins creation in DataFusion
   
   I would like a builder style API so I can write code like
   
   ```rust
   let field = old_field.clone()
     .with_nullable(force_nullable)
   ```
   
   but instead I have to write
   
   ```rust
       if force_nullable {
           Field::new(
               old_field.name(),
               old_field.data_type().clone(),
               true
           )
       } else {
           old_field.clone()
       }
   ```
   
   **Describe the solution you'd like**
   Ideally we could add functions to https://docs.rs/arrow/16.0.0/arrow/datatypes/struct.Field.html
   
   ```rust
   impl Field {
     pub fn with_nullable(mut self, nullable: bool) -> Self {
      .. 
     }
     pub fn with_dict_id(mut self, dict_id: i64) -> Self {
      .. 
     }
     pub fn with_data_type(mut self, data_type: DataType) -> Self {
      .. 
     }
     pub fn with_dict_is_ordered(mut self, dict_is_ordered: Option<bool>) -> Self {
      .. 
     }
   }
   ```
   
   
   **Describe alternatives you've considered**
   A clear and concise description of any alternative solutions or features you've considered.
   
   **Additional context**
   Add any other context or screenshots about the feature request here.
   


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[GitHub] [arrow-rs] tustvold closed issue #1934: Add builder style methods to `Field`

[GitBox <gi...@apache.org>]

tustvold closed issue #1934: Add builder style methods to `Field`
URL: https://github.com/apache/arrow-rs/issues/1934


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