When you are upserting a row (PostgreSQL >= 9.5), and you want the possible INSERT to be exactly the same as the possible UPDATE, you can write it like this:

INSERT INTO tablename (id, username, password, level, email) VALUES (1, 'John', 'qwerty', 5, '')
ON CONFLICT (id) DO UPDATE SET id=EXCLUDED.id, username=EXCLUDED.username, password=EXCLUDED.password, level=EXCLUDED.level,email=EXCLUDED.email

Is there a shorter way? To just say: use all the EXCLUDE values.

In SQLite I used to do :

INSERT OR REPLACE INTO tablename (id, user, password, level, email) VALUES (1, 'John', 'qwerty', 5, '')

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1 Answer

Postgres hasn't implemented an equivalent to INSERT OR REPLACE. From the ON CONFLICT docs (emphasis mine):

It can be either DO NOTHING, or a DO UPDATE clause specifying the exact details of the UPDATE action to be performed in case of a conflict.

Though it doesn't give you shorthand for replacement, ON CONFLICT DO UPDATE applies more generally, since it lets you set new values based on preexisting data. For example:

INSERT INTO users (id, level)
VALUES (1, 0)
ON CONFLICT (id) DO UPDATE
SET level = users.level + 1;

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