The following bug has been logged on the website:
Bug reference: 17301
Logged by: Dinary Dai
Email address: dddinary@163.com
PostgreSQL version: 14.0
Operating system: Ubuntu
Description:
/* init */ create table t(a int primary key, b int);
/* init */ insert into t values (1, 2), (2, 3)
/* t1 */ begin;
/* t1 */ set transaction isolation level repeatable read;
/* t1 */ select * from t where a = 1;
/* t2 */ begin;
/* t2 */ set transaction isolation level repeatable read;
/* t2 */ delete from t where a = 2;
/* t2 */ commit;
/* t1 */ update t set a = 2 where a = 1;
/* t1 */ select * from t where a = 2; -- [(2, 3), (2, 2)]
/* t1 */ commit;
The final SELECT statement gets result [(2, 3), (2, 2)], which violates the
primary key constraint on column `a`.