PostgreSQL Upsert dengan klausa WHERE

Anda memerlukan indeks parsial. Jatuhkan batasan unik pada kolom name dan buat indeks parsial pada kolom:

CREATE TABLE customers (
    customer_id serial PRIMARY KEY,
    name VARCHAR,
    email VARCHAR NOT NULL,
    active bool NOT NULL DEFAULT TRUE
);

CREATE UNIQUE INDEX ON customers (name) WHERE active;

INSERT INTO customers (NAME, email) VALUES
 ('IBM', '[email protected]'),
 ('Microsoft', '[email protected]'),
 ('Intel','[email protected]');

Kueri akan terlihat seperti ini:

INSERT INTO customers (name, email)
VALUES
    ('Microsoft', '[email protected]') 
ON CONFLICT (name) WHERE active
DO UPDATE SET email = excluded.email;

SELECT *
FROM customers;

 customer_id |   name    |         email         | active 
-------------+-----------+-----------------------+--------
           1 | IBM       | [email protected]       | t
           3 | Intel     | [email protected]     | t
           2 | Microsoft | [email protected] | t
(3 rows)    

Perhatikan penggunaan yang tepat dari catatan khusus excluded. Per dokumentasi: