Function datafusion::datasource::physical_plan::wrap_partition_type_in_dict

pub fn wrap_partition_type_in_dict(val_type: DataType) -> DataType

Convert type to a type suitable for use as a ListingTable partition column. Returns Dictionary(UInt16, val_type), which is a reasonable trade off between a reasonable number of partition values and space efficiency.

This use this to specify types for partition columns. However you MAY also choose not to dictionary-encode the data or to use a different dictionary type.

Use wrap_partition_value_in_dict to wrap a ScalarValue in the same say.