Adding a new value to an existing ENUM Type

Question

I have a table column that uses an enum type. I wish to update that enum type to have an additional possible value. I don\'t want to delete any exi

Answer 1

PostgreSQL 9.1 introduces ability to ALTER Enum types:

ALTER TYPE enum_type ADD VALUE 'new_value'; -- appends to list
ALTER TYPE enum_type ADD VALUE 'new_value' BEFORE 'old_value';
ALTER TYPE enum_type ADD VALUE 'new_value' AFTER 'old_value';