ALTER clause
The ALTER
clause is used to change existing definitions of enums.
1. Altering an enums
1.1 Adding an extra value
Use the following query to add a single value to an existing enum.
ALTER ENUM Suit ADD VALUE Joker;
1.2 Updating a value
Use the following query to change representation of an existing value in an existing enum.
ALTER ENUM Suit UPDATE VALUE Joker TO Wild;