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https://dev.mysql.com/doc/refman/5.7/en/explain-extended.html
For results consisting of multiple values, a temporary table may be created and you might see <temporary table> instead. <in_optimizer>(query fragment) This is an internal optimizer object with no user significance. <ref_null_helper>(expr) This is ... For SELECT statements, the EXPLAIN statement produces extra (“extended”) information that is not part of EXPLAIN output but can be viewed by issuing a SHOW WARNINGS statement following ...
https://dev.mysql.com/doc/refman/5.7/en/fulltext-fine-tuning.html
Note Minimum and maximum word length full-text parameters do not apply to FULLTEXT indexes created using the ngram parser. For an example specific to full-text indexing, see Section 12.9.7, “Adding a User-Defined Collation for Full-Text ...You can ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-introduction.html
Unless you have configured a different default storage engine, issuing a CREATE TABLE statement without an ENGINE clause creates an InnoDB table. Key Advantages of InnoDB Its DML operations follow the ACID model, with transactions featuring commit, ... InnoDB is a general-purpose storage engine that balances high reliability and high ...
https://dev.mysql.com/doc/refman/5.7/en/ldml-collation-example.html
The collation is designed for a scenario involving a Web application for which users post their names and phone numbers. You can check the variable value as follows, although the path name might be different on your system: mysql> SHOW VARIABLES ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-mysqld.html
row *************************** Id: 1 User: system user Host: db: Command: Daemon Time: 1 State: Waiting for event from ndbcluster Info: NULL Important To participate in an NDB Cluster, the mysqld process must be started with both the options ...To ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-what-is-new-7-5.html
The create_old_temporals system variable was deprecated in NDB Cluster 7.4, and has now been removed. This setting can be controlled for individual tables by means of a PARTITION_BALANCE option (renamed from FRAGMENT_COUNT_TYPE in NDB 7.5.4) ...
https://dev.mysql.com/doc/refman/5.7/en/replication-sbr-rbr.html
For most users, the mixed replication format should provide the best combination of data integrity and performance. SELECT, a CREATE statement is generated from the table definition and replicated using statement-based format, while the row ...If, ...
https://dev.mysql.com/doc/refman/5.7/en/sys-processlist.html
tmp_tables The number of internal in-memory temporary tables created by the current statement. tmp_disk_tables The number of internal on-disk temporary tables created by the current statement. The MySQL process list indicates the operations ...
https://dev.mysql.com/doc/refman/5.7/en/thread-commands.html
A thread can have any of the following Command values: Binlog Dump This is a thread on a replication source for sending binary log contents to a replica. Daemon This thread is internal to the server, not a thread that services a client connection.
https://dev.mysql.com/doc/refman/5.7/en/information-schema-table-reference.html
The following table summarizes all available INFORMATION_SCHEMA tables. For greater detail, see the individual table descriptions. Table 24.1 INFORMATION_SCHEMA Tables Table Name Description Deprecated CHARACTER_SETS Available character sets ...