怎么样方便的找到这些多余的索引呢,有一个很有用的工具pt-duplicate-key-checker 示例 在employees表上创建如下的索引 代码语言:sql AI代码解释 mysql>createindexidx_nameonemployees(last_name,first_name);Query OK,0rowsaffected(3.28sec)Records:0Duplicates:0Warnings:0mysql>createindexidx_last_nameonemployees(...
mysql>stop slave; Query OK,0 rows affected (0.01sec) mysql> CHANGE MASTERTO MASTER_HOST='192.168.2.128',MASTER_USER='repl', MASTER_PASSWORD='123456',MASTER_LOG_FILE='mysql-bin.000004',MASTER_LOG_POS=245; Query OK,0 rows affected (0.01sec) mysql>start slave; Query OK,0 rows affected ...
为协助您确定此类不兼容性,当从 Aurora MySQL 版本 2 升级到版本 3 时,Aurora 会自动运行升级兼容性检查(预检查),来检查数据库集群中的对象并确定可能阻碍升级继续进行的已知不兼容性。有关 Aurora MySQL 预检查的详细信息,请参阅Aurora MySQL 的预检查描述参考。除了社区 MySQLupgrade checker utility运行的预检查...
SQL Query Optimizer SQL Syntax Checker SQL Formatter PostgreSQL Playground Slow Query Log Visualizer Text to SQL SQL to Text SQL to Hibernate Code SQL to TypeORM Code SQL to Prisma Code SQL to Sequelize Code SQL to Django Code SQL to SQLAlchemy Code SQL to GORM Code SQL to Entity Framework...
ERROR 1045 (28000): ProxySQL Admin Error: near"load": syntax error MySQL [(none)]> load admin variables to runtime; Query OK, 0 rows affected (0.001 sec) MySQL [(none)]> save admin variables to disk; Query OK, 43 rows affected (0.001 sec) ...
If enabled the driver will throw an exception for queries issued on a stale or dead connection, which belong to the current transaction, but will attempt reconnect before the next query issued on the connection in a new transaction. The use of this feature is not recommended, because it has...
is_regular() : mysql_harness::Path, Query_arena, Sql_cmd, THD is_relative_path() : Fil_path is_relay_log_event() : Log_event is_relay_log_truncated() : Relay_log_info is_release_locked() : anonymous_namespace{dictionary_client.cc}::MDL_checker is_rename_table() : PT_alter_table...
Confidential – Oracle Internal/Restricted/Highly Restricted 36 DBT-3 Query 8 Execution time (MySQL 8.0.3) Selected plan Plan A Plan B In-memory 5.8 secs 77.5 secs Disk-bound 9 min 47 secs 3 min 49 secs MySQL 5.6 MySQL 5.7 MySQL 8.0 In-memory Disk-bound Plan B Plan A Plan A Plan ...
(Bug #19598393, Bug #70993) * The SQL syntax checker would show errors for EXECUTE statements without the "using" keyword. (Bug #19560590, Bug #73804) * A new GTID_PURGED option was added under "Advanced options" to the Data Export wizard. (Bug #19528673) * There was a performance ...
You may argue that we still have the double range scan and we still can’t use the index beyondvalid_till. Yes that might be true, but at the same time reversing the two date columns caused our query to find a single entry in the index for 99% of our queries while it can still ...