This jira is an enhancement of feature we introduced as
Whenever user selects a structured type, the output clauses columns get created with all fields belonging to the chosen structured type.
if the user already has a column with any data typed in, we have to keep it.
- Action should be undoable/redoable, especially if user had structure data type, more columns with a lot of data and mistakenly change to simple type, i.e. single column
- The feature works just for 1 level of nesting imagine structure below, just single column address will be created