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https://dev.mysql.com/doc/refman/5.7/en/rewriter-query-rewrite-plugin-usage.html
The plugin determines whether to rewrite statements based on its in-memory cache of rewriting rules, which are loaded from the rewrite_rules table in the query_rewrite database. The following example creates a simple rule to match statements that ...
https://dev.mysql.com/doc/refman/5.7/en/storage-requirements.html
InnoDB Table Storage Requirements NDB Table Storage Requirements Numeric Type Storage Requirements Date and Time Type Storage Requirements String Type Storage Requirements Spatial Type Storage Requirements JSON Storage Requirements The storage ...
https://dev.mysql.com/doc/refman/5.7/en/time-zone-support.html
This section describes the time zone settings maintained by MySQL, how to load the system tables required for named time support, how to stay current with time zone changes, and how to enable leap-second support. Time Zone Variables Populating the ...For information about time zone settings in replication setups, see Section 16.4.1.15, “Replication and System Functions” and Section 16.4.1.31, “Replication and Time ...
https://dev.mysql.com/doc/refman/5.7/en/faqs-cjk.html
Does MySQL permit CJK characters to be used in database and table names? A.11.18. You can obtain this information for a column column_name in the table table_name using the following query: SELECT HEX(column_name) FROM table_name; 3F is the encoding ... This set of Frequently Asked Questions derives from the experience of MySQL's Support and Development groups in handling many inquiries about CJK (Chinese-Japanese-Korean) ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-locking.html
Intention Locks InnoDB supports multiple granularity locking which permits coexistence of row locks and table locks. WRITE takes an exclusive lock (an X lock) on the specified table. Intention locks are table-level locks that indicate which type of ...Shared and Exclusive Locks Intention Locks Record Locks Gap Locks Next-Key Locks Insert Intention Locks AUTO-INC Locks Predicate Locks for Spatial Indexes Shared and Exclusive Locks InnoDB implements standard row-level locking where there are two types of locks, shared (S) locks and exclusive (X) ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-management.html
MySQL 5.7 provides a number of ways to modify partitioned tables. All of these actions can be carried out using the partitioning extensions to the ALTER TABLE statement. There are also ways to obtain information about partitioned tables and ...It ...
https://dev.mysql.com/doc/refman/5.7/en/replication-features-transactions.html
In general, you should avoid transactions that update both transactional and nontransactional tables in a replication environment. You should also avoid using any statement that accesses both transactional (or temporary) and nontransactional tables ...The server uses these rules for binary logging: If the initial statements in a transaction are nontransactional, they are written to the binary log ...
https://dev.mysql.com/doc/refman/5.7/en/rewriter-query-rewrite-plugin-reference.html
Users communicate with the plugin by modifying the set of rules stored in this table. The plugin communicates information to users by setting the table's message column. Note The rules table is loaded into the plugin by the flush_rewrite_rules ...
https://dev.mysql.com/doc/refman/5.7/en/identifier-qualifiers.html
For example, this statement creates a table using the unqualified name t1: CREATE TABLE t1 (i INT); Because t1 includes no qualifier to specify a database, the statement creates the table in the default database. This statement creates a table using ...An unqualified name is permitted in contexts where interpretation of the name is ...
https://dev.mysql.com/doc/refman/5.7/en/information-functions.html
For example, BENCHMARK(10, (SELECT * FROM t)) fails if the table t has more than one column or more than one row. The former involves the parser, optimizer, table locking, and runtime evaluation N times each. mysql> SELECT COERCIBILITY('abc' COLLATE ...It may be used to time how quickly MySQL processes the ...