EntityOperationRecordsidentity_idoperation_timeoperation_content StartCreate_TableInsert_DataQuery_Latest_RecordEnd 通过上面的示例,我们成功实现了从MySQL数据库中获取相同数据中的最新一条记录。希望本文对你有所帮助,如果有任何问题或疑问,欢迎留言讨论!
«interface»MySQL+query(sql: String) : ResultSetMethod1-table_name: String+queryLatestRecord() : ResultSetMethod2-table_name: String+queryLatestRecord() : ResultSetMethod3-table_name: String+queryLatestRecord() : ResultSetResultSet+next() : boolean+getString(column: String) : String+getI...
Re: SELECT the LATEST Record FOR Each UserID Robert Hanson March 23, 2012 03:14PM Re: SELECT the LATEST Record FOR Each UserID Rick James March 25, 2012 03:17PM Sorry, you can't reply to this topic. It has been closed. Content reproduced on this site is the property of the respec...
()) // converts SourceRecord to JSON String .build(); StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(); // enable checkpoint env.enableCheckpointing(3000); env .fromSource(mySqlSource, WatermarkStrategy.noWatermarks(), "MySQL Source") // set 4 parallel source ...
1,行锁(Record Locks) 2,间隙锁(Gap Locks) 3,临键锁(Next-key Locks) 4,共享锁/排他锁(Shared and Exclusive Locks) 5,意向共享锁/意向排他锁(Intention Shared and Exclusive Locks) 6,插入意向锁(Insert Intention Locks) 7,自增锁(Auto-inc Locks) ...
(2) WAITING FOR THIS LOCK TO BE GRANTED: #等待其他事物释放的锁RECORD LOCKS space id 35169 page no 4 n bits 72 index idx_age of table `mos621_gsms`.`user` trx id 1967619649 lock_mode X insert intention waitingRecord lock, heap no 1 PHYSICAL RECORD: n_fields 1; compact format; info...
If the client’s connection to the server takes longer than the value ofconnect_timeout, the server will record an error for this client. If the number of errors reachesmax_connect_errors, this client will be locked. 3. Troubleshooting steps: ...
ERROR1213(40001): Deadlock found when trying to get lock; try restarting transaction 使用show engine innodb status\G;查看 找到LATEST DETECTED DEADLOCK---LATEST DETECTED DEADLOCK---2023-03-1014:57:500x7f5c285a3700*** (1) TRANSACTION: TRANSACTION1399, ACTIVE20sec starting index read mysql ...
RECORD LOCKS space id 27 page no 5 n bits 72 index idx_c1 of table `test`.`tx` trx id 1849 lock_mode X locks rec but not gap waiting *** WE ROLL BACK TRANSACTION (1) 2.4 分析死锁日志 首先要理解的是 对同一个字段申请加锁是需要排队的。
That's weird. I just searched for 'latest per'. Result no.19 (probably result no.20 now that I've written this) seemed to be pretty close to what you're looking for and besides... -- A frequently asked question relates to finding the Top-N of an aggregated result, one of a set...