PDF (US Ltr)
- 35.1Mb
PDF (A4)
- 35.2Mb
Man Pages (TGZ)
- 256.4Kb
Man Pages (Zip)
- 361.2Kb
Info (Gzip)
- 3.4Mb
Info (Zip)
- 3.4Mb
Search Results
https://dev.mysql.com/doc/refman/5.7/en/information-schema-innodb-sys-foreign-cols-table.html
The INNODB_SYS_FOREIGN_COLS table provides status information about the columns of InnoDB foreign keys, equivalent to the information from the SYS_FOREIGN_COLS table in the InnoDB data dictionary. For related usage information and examples, see ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-innodb-sys-foreign-table.html
The INNODB_SYS_FOREIGN table provides metadata about InnoDB foreign keys, equivalent to the information from the SYS_FOREIGN table in the InnoDB data dictionary. For related usage information and examples, see Section 14.16.3, “InnoDB ...TYPE A ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-status-table.html
Note The value of the show_compatibility_56 system variable affects the information available from the tables described here. Note Information available from the tables described here is also available from the Performance Schema. The ...For ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-triggers-table.html
To see information about a table's triggers, you must have the TRIGGER privilege for the table. The TRIGGERS table has these columns: TRIGGER_CATALOG The name of the catalog to which the trigger belongs. This is the type of operation on the ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-variables-table.html
Note The value of the show_compatibility_56 system variable affects the information available from the tables described here. Note Information available from the tables described here is also available from the Performance Schema. The ...For ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-mutex-instances-table.html
The mutex_instances table lists all the mutexes seen by the Performance Schema while the server executes. The mutex_instances table has these columns: NAME The instrument name associated with the mutex. The setup_instruments table lists the name of ...A mutex is a synchronization mechanism used in the code to enforce that only one thread at a given time can have access to some common ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-objects-summary-global-by-type-table.html
The Performance Schema maintains the objects_summary_global_by_type table for aggregating object wait events. row *************************** OBJECT_TYPE: TABLE OBJECT_SCHEMA: test OBJECT_NAME: t COUNT_STAR: 3 SUM_TIMER_WAIT: 263126976 ...Example ...
https://dev.mysql.com/doc/refman/5.7/en/commit.html
To disable autocommit mode implicitly for a single series of statements, use the START TRANSACTION statement: START TRANSACTION; SELECT @A:=SUM(salary) FROM table1 WHERE type=1; UPDATE table2 SET summary=@A WHERE type=1; COMMIT; With START ...SET ...
https://dev.mysql.com/doc/refman/5.7/en/timestamp-initialization.html
For any TIMESTAMP or DATETIME column in a table, you can assign the current timestamp as the default value, the auto-update value, or both: An auto-initialized column is set to the current timestamp for inserted rows that specify no value for the ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-limitations-locking.html
In addition, ALTER TABLE statements take metadata locks on the table level. In MySQL 5.7, partition lock pruning eliminates unneeded locks in many cases, and most statements reading from or updating a partitioned MyISAM table cause only the effected ...Effects on DML statements SELECT statements (including those containing unions or joins) lock only those partitions that actually need to be ...