The comparison on another column. If the new column takes different values
(another type family, another enumeration, or no known type), the operator
goes back to Equal (or, for a type without Equal, its first operator) and
the value is cleared; otherwise both are kept, and text that was invalid is
read again as a value of the new column's type.
The comparison on another column. If the new column takes different values (another type family, another enumeration, or no known type), the operator goes back to Equal (or, for a type without Equal, its first operator) and the value is cleared; otherwise both are kept, and text that was invalid is read again as a value of the new column's type.