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https://dev.mysql.com/doc/refman/8.4/en/show-status.html
SHOW [GLOBAL | SESSION] STATUS [LIKE 'pattern' | WHERE expr] SHOW STATUS provides server status information (see Section 7.1.10, “Server Status Variables”). Status variable information is also available from these sources: Performance Schema ...
https://dev.mysql.com/doc/refman/8.4/en/silent-column-changes.html
Columns that are part of a PRIMARY KEY are made NOT NULL even if not declared that way. In some cases, MySQL silently changes column specifications from those given in a CREATE TABLE or ALTER TABLE statement. These might be changes to a data type, ...
https://dev.mysql.com/doc/refman/8.4/en/source-installation-doxygen.html
When you install PlantUML on Windows (tested on Windows 10), you must run it at least once as administrator so it creates the registry keys. The MySQL source code contains internal documentation written using Doxygen. It is also possible to ...
https://dev.mysql.com/doc/refman/8.4/en/sql-prepared-statements.html
Using prepared statements with placeholders for parameter values has the following benefits: Less overhead for parsing the statement each time it is executed. Typically, database applications process large volumes of almost-identical statements, ...
https://dev.mysql.com/doc/refman/8.4/en/sys-ps-trace-statement-digest.html
Traces all Performance Schema instrumentation for a specific statement digest. If you find a statement of interest within the Performance Schema events_statements_summary_by_digest table, specify its DIGEST column MD5 value to this procedure and ...
https://dev.mysql.com/doc/refman/8.4/en/system-variables-controlling-tracing.html
end_markers_in_json: If set to 1, causes the trace to repeat the key (if present) near the closing bracket. The following system variables affect optimizer tracing: optimizer_trace: Enables or disables optimizer tracing. optimizer_trace_features: ...
https://dev.mysql.com/doc/refman/8.4/en/table.html
TABLE is a DML statement which returns rows and columns of the named table. Given the existence of a table named t, the following two statements produce identical output: TABLE t; SELECT * FROM t; You can order and limit the number of rows produced ...
https://dev.mysql.com/doc/refman/8.4/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 offsets are also ...
https://dev.mysql.com/doc/refman/8.4/en/type-conversion.html
When an operator is used with operands of different types, type conversion occurs to make the operands compatible. For example, MySQL automatically converts strings to numbers as necessary, and vice versa. mysql> SELECT 1+'1'; -> 2 mysql> SELECT ...
https://dev.mysql.com/doc/refman/8.4/en/unix-signal-response.html
Some command interpreters associate certain key sequences with signals, such as Control+C to send a SIGINT signal. On Unix and Unix-like systems, a process can be the recipient of signals sent to it by the root system account or the system account ...