yyy1000 commented on issue #9714:
URL: 
https://github.com/apache/arrow-datafusion/issues/9714#issuecomment-2020606452

   I'd like to try this, from the description, 
   
   > Until the partition by parsing uses ColumnDef
   
   So maybe trying to make `partition by` use `ColumnDef`, currently, my plan 
is:
   1. Make `table_partition_cols` field in 
https://github.com/apache/arrow-datafusion/blob/39f4aaf5cd1abfc9204c3eb96effdb4ebcf5b882/datafusion/sql/src/parser.rs#L206
 `CreateExternalTable` statement to `Vec<ColumnRef>`
   2. make `parse_partitions` return `ColumnRef` like `parse_columns`. 
https://github.com/apache/arrow-datafusion/blob/39f4aaf5cd1abfc9204c3eb96effdb4ebcf5b882/datafusion/sql/src/parser.rs#L542
   3. In `external_table_to_plan`, do the same thing to  `table_partition_cols` 
 like `column_defaults` 
https://github.com/apache/arrow-datafusion/blob/39f4aaf5cd1abfc9204c3eb96effdb4ebcf5b882/datafusion/sql/src/statement.rs#L984-L987
   
   So this will not convert the Ident value to string too early, but I also 
doubt whether it would fix this. I encountered similar issue related to `' ` 
characters in my past experience and it's a bit tricky.


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