大概意思就是:insert会对插入成功的行加上排它锁,这个排它锁是个记录锁,而非next-key锁(也不是gap锁了),不会阻止其他并发的事务往这条记录之前插入记录。在插入之前,会先在插入记录所在的间隙加上一个插入意向gap锁,并发的事务可以对同一个gap加意向gap锁。如果insert 的事务出现了duplicate-key error ,事务会...
At the bottom is the upper part of the error message I can getting. It essentially repeats this error with different files pointing back to the same line in the Notification DAO. I'm all sorts of "Wait, what?" on this. Is this somehow pointing to a line as having the error although...
A duplicate product code error means that the CD key you are trying to register has already been redeemed to a Steam account. The key cannot be registered again. If you received a duplicate CD key from your retail purchase you will need to contact the retailer who sold you the key. Steam...
第二步、在原先自己定义集合的schema中添加一个Id字段,后面的值为了保证其唯一性我们可以 new Date()当做他的值 哈哈是不是很简单 ,至此在重新添加数据就Ok了
ERROR Internal session terminated with a runtime error DBSQL_DUPLICATE_KEY_ERROR Please let me know why this error is coming when I am executing a report in SAP.
"If a duplicate-key error occurs, a shared lock on the duplicate index record is set." 对于insert操作来说,若发生唯一约束冲突,则需要对冲突的唯一索引加上S Next-key Lock。从这里会发现,即使是RC事务隔离级别,也同样会存在Next-Key Lock锁,从而阻塞并发。然而,文档没有说明的是,对于检测到冲突的唯一索...
check error; {check error for debugging purposes} warning str(err()); {for debugging purposes} You would expect that this would work fine however what what we found that no records were copied and the error message given on the check error statement was: ...
Caused by: java.sql.SQLIntegrityConstraintViolationException: Duplicate entry 'Le1DNspbSb6r-GFsJqh1sA' for key 'UKmiippl8ygi3wyaqxebh4r3p1w' at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:117) at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java...
Error: Could not Copy create table accounts ( account_id integer generated as identity not null primary key, username varchar2(10) not null unique, given_name varchar2(512) not null ); The table can only have one primary key. So at least one ofaccount_idandusernamemust be a unique cons...
CONSTRAINT project_tag_uk UNIQUE (user_id, tag) ); # first transaction START TRANSACTION; INSERT INTO `user_tag` (`user_id`, `tag`) VALUES (1, 'user1_tag1'); # Run second time to get duplicate key error INSERT INTO `user_tag` (`user_id`, `tag`) ...