Am 24.03.2024 um 15:54 schrieb Erik Wienhold:
This is required by the SQL standard: columns of a primary key must be NOT NULL. Postgres automatically adds the missing NOT NULL constraints when defining a primary key. You can verify that with \d test1 in psql.
To me, this behaviour, while correct, is not too concise. I wished, that PG issued a warning about a definition conflict. In PostgreSQL, a PK must always be not nullable, so explicitly defining on of a PK's columns as nullable is contradictory, one should get notified of.
The two dimes of Thiemo
