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事务管理和数据库管理

数据仓库服务 GAUSSDB(DWS)-事务管理:TRANSACTION

TRANSACTION DSC工具在迁移MySQL事务处理语句时会根据 GaussDB (DWS)特性进行相应适配。输入示例 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ##该声明仅适用于会话中执行的下一个单个事务 SET TRANSACTION ISOLATION LEVEL READ COMMITTED; SET TRANSACTION ISOLATION LEVEL REPEATABLE READ; SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED; SET TRANSACTION ISOLATION LEVEL SERIALIZABLE; SET TRANSACTION READ ONLY; SET TRANSACTION READ WRITE; SET TRANSACTION ISOLATION LEVEL READ COMMITTED,READ ONLY; SET TRANSACTION ISOLATION LEVEL SERIALIZABLE,READ WRITE; ##使用SESSION关键字,适用于当前会话中执行的所有后续事务 START TRANSACTION; SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED; SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED; SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE; SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE; commit ; 输出示例 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 --该声明仅适用于会话中执行的下一个单个事务 SET LOCAL TRANSACTION ISOLATION LEVEL READ COMMITTED; SET LOCAL TRANSACTION ISOLATION LEVEL REPEATABLE READ; SET LOCAL TRANSACTION ISOLATION LEVEL READ UNCOMMITTED; SET LOCAL TRANSACTION ISOLATION LEVEL SERIALIZABLE; SET LOCAL TRANSACTION READ ONLY; SET LOCAL TRANSACTION READ WRITE; SET LOCAL TRANSACTION ISOLATION LEVEL READ COMMITTED READ ONLY; SET LOCAL TRANSACTION ISOLATION LEVEL SERIALIZABLE READ WRITE; --使用SESSION关键字,适用于当前会话中执行的所有后续事务 START TRANSACTION; SET SESSION CHARACTERIS TICS AS TRANSACTION ISOLATION LEVEL READ COMMITTED; SET SESSION CHARACTERISTI CS AS TRANSACTION ISOLATION LEVEL READ COMMITTED; SET SESSION CHARACTERISTICS AS TRANSACTION ISOLATION LEVEL SERIALIZABLE; SET SESSION CHARACTERISTICS AS TRANSACTION ISOLATION LEVEL SERIALIZABLE; COMMIT WORK;

数据仓库服务 GAUSSDB(DWS) 事务管理和数据库管理
数据仓库服务 GAUSSDB(DWS)-事务管理:LOCK

LOCK DSC工具在迁移MySQL事务处理锁表语句时会根据GaussDB(DWS)特性进行相应适配。输入示例 1 2 3 4 5 6 7 8 9 10 11 12 13 14 ## A. START TRANSACTION; LOCK TABLES `mt`.`runoob_tbl` WRITE,`mt`.`runoob_tb2` READ; commit; ## B. START TRANSACTION; LOCK TABLES `mt`.`runoob_tbl` WRITE; commit; ## C. START TRANSACTION; LOCK TABLES `mt`.`runoob_tbl` READ,`mt`.`runoob_tbl` AS t1 READ; commit; 输出示例 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 -- A. START TRANSACTION; LOCK TABLE "mt"."runoob_tbl" IN AC CES S EXCLUSIVE MODE; LOCK TABLE "mt"."runoob_tb2" IN ACCESS SHARE MODE; COMMIT WORK; -- B. START TRANSACTION; LOCK TABLE "mt"."runoob_tbl" IN ACCESS EXCLUSIVE MODE; COMMIT WORK; -- C. START TRANSACTION; LOCK TABLE "mt"."runoob_tbl" IN ACCESS SHARE MODE; COMMIT WORK;

数据仓库服务 GAUSSDB(DWS) 事务管理和数据库管理