Values.SchemaDefinitionSourceDefinition for a schema on a tabular Dataset.
type nonrec t = {columns : ColumnList.t option;List of column definitions.
*)primaryKeyColumns : ColumnNameList.t option;List of column names used for primary key.
*)}val to_value :
t ->
[> `Structure of
(string
* [> `List of
[> `String of ColumnName.t
| `Structure of
(string * [> `Enum of string | `String of ColumnName.t ]) list ]
list ])
list ]