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https://dev.mysql.com/doc/refman/8.4/en/performance-schema-data-locks-table.html
For information about which lock requests are blocked by which held locks, see Section 29.12.13.2, “The data_lock_waits Table”. Example data lock information: mysql> SELECT * FROM performance_schema.data_locks\G *************************** 1.
https://dev.mysql.com/doc/refman/8.4/en/string-comparison-functions.html
Table 14.13 String Comparison Functions and Operators Name Description LIKE Simple pattern matching NOT LIKE Negation of simple pattern matching STRCMP() Compare two strings If a string function is given a binary string as an argument, the ...
https://dev.mysql.com/doc/refman/8.4/en/trigger-syntax.html
To create a trigger or drop a trigger, use the CREATE TRIGGER or DROP TRIGGER statement, described in Section 15.1.22, “CREATE TRIGGER Statement”, and Section 15.1.34, “DROP TRIGGER Statement”. Here is a simple example that associates a ...
https://dev.mysql.com/doc/c-api/8.4/en/mysql-fetch-row.html
MYSQL_ROW mysql_fetch_row(MYSQL_RES *result) Description Note mysql_fetch_row() is a synchronous function. Its asynchronous counterpart is mysql_fetch_row_nonblocking(), for use by applications that require asynchronous communication with the ...
https://dev.mysql.com/doc/c-api/8.4/en/mysql-real-connect.html
MYSQL * mysql_real_connect(MYSQL *mysql, const char *host, const char *user, const char *passwd, const char *db, unsigned int port, const char *unix_socket, unsigned long client_flag) Description Note mysql_real_connect() is a synchronous function.
https://dev.mysql.com/doc/extending-mysql/8.4/en/plugin-status-system-variables.html
The server plugin interface enables plugins to expose status and system variables using the status_vars and system_vars members of the general plugin descriptor. The status_vars member of the general plugin descriptor, if not 0, points to an array ...
https://dev.mysql.com/doc/workbench/en/wb-develop-sql-editor-results.html
The results area of the screen shows the results from executed statements. If the script contains multiple statements, a result subtab will be generated for each statemented that returned results. The following figure shows a single subtab and ...
https://dev.mysql.com/doc/connectors/en/connector-j-usagenotes-tomcat.html
The following instructions are based on the instructions for Tomcat-5.x, available at http://tomcat.apache.org/tomcat-5.5-doc/jndi-datasource-examples-howto.html which is current at the time this document was written. First, install the .jar file ...
https://dev.mysql.com/doc/internals/en/defining-filename-extensions.html
Storage engines are required to provide the MySQL server with a list of extensions used by the storage engine with regard to a given table, its data and indexes. Extensions are expected in the form of a null-terminated string array.
https://dev.mysql.com/doc/internals/en/starting-transaction-from-start-stmt-call.html
The first method call that can start a transaction is the [custom-engine.html#custom-engine-transactions-starting-start-stmt start_stmt()] method. It holds state relevant data for the current client, such as identity, network connection and other ...