"annotation$item_id_type$uk" EXCLUDE USING btree (item_id, type) DEFERRABLE INITIALLY DEFERRED 能联系起来? 查找资料之后发现,DEFERRABLE INITIALLY DEFERRED的作用是将唯一约束检查推迟到commit时进行。这就能说通了:441提交时,需要检查annotation表的唯一性,也就需要对annotation表加锁。如果2699已经持有了annotati...
1.DEFERRABLE INITIALLY DEFERRED 2.DEFERRABLE INITIALLY IMMEDIATE 3.NOT DEFERRABLE Copy "subject_iddddd"INTEGERREFERENCES"Subjects" ("id") DEFERRABLE INITIALLY IMMEDIATE 注1:IMMEDIATE会在每一个语句执行后进行约束检查,DEFERRED则只会在事务结束时才检查约束。(DEFERRED 只是推迟检查而不是不检查) 注2:此设置仅...
【测试类型:SQL功能】【测试版本:6.0.0】【ustore】 ustore表使用进行外键约束deferrable initially deferred创建后,存在部分情况commit时无法检查约束 【操作系统和硬件信息】(查询命令: cat /etc/system-release, uname -a): CentOS Linux release 7.7.1908 (Core) 【测试环境】(单机/1主x备x级联备): 单机 【...
postgres=# begin; BEGIN postgres=# alter table tb alter constraint fk_tb_fid DEFERRABLE initially deferred; ALTER TABLE postgres=# update ta set id=2; UPDATE 1 postgres=# update tb set fid=2; UPDATE 1 postgres=# commit; COMMIT postgres=# alter table tb alter constraint fk_tb_fid not DE...
Database Vendor & Version: postgres 11 Operating System Type & Version: ubuntu (wsl) Description PrimaryKey constraint does not honor 'deferrable' and 'initiallyDeferred' settings so that created primary key is not 'deferred' Steps To Reproduce Use script: <databaseChangeLog xmlns="http://www....
I was wondering if it could be added for UNIQUE in the backend when supported, the way the postgres backend currently does for foreign keys (i.e. always). Though INITALLY DEFERRED seems like something that more generically should be supported for foreign keys and other constraints via a defe...