alamb commented on code in PR #15261:
URL: https://github.com/apache/datafusion/pull/15261#discussion_r2150964083
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datafusion/datasource/src/schema_adapter.rs:
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@@ -98,6 +100,46 @@ pub trait SchemaMapper: Debug + Send + Sync {
fn map_batch(&self, batch: RecordBatch) ->
datafusion_common::Result<RecordBatch>;
}
+pub trait MissingColumnGeneratorFactory: Debug + Send + Sync {
Review Comment:
I haven't had a chance to review this entire PR yet, but I am feeling a
little strange that these traits are not used by `SchemaMapper` but instead are
used by `DefaultSchemaMapper`
I wonder what is the usecase for these extra two traits, compared to say
adding a method on `SchemaMapper`
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