setup: ==== drop table if exists t1; create table t1 (f1 int); create unique index uix_t1 on t1(f1) ; insert into t1(f1) values (1), (2), (3); select * from t1; f1 --- 1 2 3 test statement: ============ update t1 set f1 = f1 + 1; In PostgreSQL I got, ERROR: duplicate key value violates unique constraint "uix_t1" DETAIL: Key (f1)=(2) already exists. I tried the same test statement in both SQL Server and Oracle I got correct/expected results as below: select * from t1; f1 --- 2 3 4 I thought the Atomic should be at statement level, could anyone tell me why PostgreSQL behaves differently? -- View this message in context: http://postgresql.1045698.n5.nabble.com/Another-unexpected-behaviour-tp4610242p4610242.html Sent from the PostgreSQL - general mailing list archive at Nabble.com. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
