Enums are represented as types in postgres.
There is no "IF NOT EXISTS" for types in the postgres-language.
This is what ChatGPT came up with:
In PostgreSQL, you cannot directly use "IF NOT EXISTS" when creating an enum type. However, you can achieve the desired effect using a DO block with a PL/pgSQL anonymous code block to check if the enum type exists before attempting to create it.
Here's an example that demonstrates how to create an enum type called "example_enum" with values 'value1', 'value2', and 'value3', if it does not already exist:
DO $$
BEGIN
IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'example_enum') THEN
CREATE TYPE example_enum AS ENUM ('value1', 'value2', 'value3');
END IF;
END $$;
In this example, the DO block checks if the 'example_enum' type exists in the pg_type system catalog table. If it doesn't exist, the CREATE TYPE statement is executed to create the new enum type.
Enums are represented as types in postgres. There is no "IF NOT EXISTS" for types in the postgres-language. This is what ChatGPT came up with:
In PostgreSQL, you cannot directly use "IF NOT EXISTS" when creating an enum type. However, you can achieve the desired effect using a DO block with a PL/pgSQL anonymous code block to check if the enum type exists before attempting to create it.
Here's an example that demonstrates how to create an enum type called "example_enum" with values 'value1', 'value2', and 'value3', if it does not already exist:
In this example, the DO block checks if the 'example_enum' type exists in the
pg_typesystem catalog table. If it doesn't exist, the CREATE TYPE statement is executed to create the new enum type.