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https://dev.mysql.com/doc/refman/5.7/en/sys-statement-analysis.html
tmp_tables The total number of internal in-memory temporary tables created by occurrences of the statement. tmp_disk_tables The total number of internal on-disk temporary tables created by occurrences of the statement. The statement_analysis and ...
https://dev.mysql.com/doc/refman/5.7/en/tracing-example.html
Now we can examine the trace, whose first column (QUERY), containing the original statement to be traced, is shown here: SELECT * FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE\G *************************** 1. row *************************** QUERY: SELECT ...
https://dev.mysql.com/doc/refman/5.7/en/trigger-metadata.html
To obtain metadata about triggers: Query the TRIGGERS table of the INFORMATION_SCHEMA database.
https://dev.mysql.com/doc/refman/5.7/en/tutorial.html
This chapter provides a tutorial introduction to MySQL by showing how to use the mysql client program to create and use a simple database. If you are interested only in accessing an existing database, you may want to skip the sections that describe ...mysql (sometimes referred to as the “terminal monitor” or just “monitor”) is an interactive program that enables you to connect to a MySQL server, run queries, and view the ...
https://dev.mysql.com/doc/refman/5.7/en/update.html
For information about generated columns, see Section 13.1.18.7, “CREATE TABLE and Generated Columns”. UPDATE is a DML statement that modifies rows in a table. Single-table syntax: UPDATE [LOW_PRIORITY] [IGNORE] table_reference SET ...
https://dev.mysql.com/doc/refman/5.7/en/version-tokens-usage.html
These functions permit the server's list of version tokens to be created, changed, removed, and inspected: version_tokens_set() completely replaces the current list and assigns a new list. Before using Version Tokens, install it according to the ...
https://dev.mysql.com/doc/refman/5.7/en/view-metadata.html
To obtain metadata about views: Query the VIEWS table of the INFORMATION_SCHEMA database.
https://dev.mysql.com/doc/refman/5.7/en/generated-column-index-optimizations.html
For example: CREATE TABLE t1 (f1 INT, gc INT AS (f1 + 1) STORED, INDEX (gc)); The generated column, gc, is defined as the expression f1 + 1. The column is also indexed and the optimizer can take that index into account during execution plan ...This ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-limitations-disk-data.html
Extents require sufficient DiskPageBufferMemory; you must reserve enough for this parameter to account for all memory used by all extents (number of extents times size of extents). Disk data objects are subject to the following maximums and ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-connection-attribute-tables.html
These Performance Schema tables expose attribute information: session_account_connect_attrs: Connection attributes for the current session, and other sessions associated with the session account session_connect_attrs: Connection attributes for all ... Connection attributes are key-value pairs that application programs can pass to the server at connect ...