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https://dev.mysql.com/doc/refman/5.7/en/dba-dtrace-server.html
Examples of this are given as the format and arguments of each probe are provided. Support for DTrace is deprecated in MySQL 5.7 and is removed in MySQL 8.0. The DTrace probes in the MySQL server are designed to provide information about the ...
https://dev.mysql.com/doc/refman/5.7/en/debugging-mysql.html
This section describes debugging techniques that assist efforts to track down problems in MySQL.
https://dev.mysql.com/doc/refman/5.7/en/declare-condition.html
DECLARE condition_name CONDITION FOR condition_value condition_value: { mysql_error_code | SQLSTATE [VALUE] sqlstate_value } The DECLARE ... CONDITION statement declares a named error condition, associating a name with a condition that needs ...
https://dev.mysql.com/doc/refman/5.7/en/declare-cursor.html
DECLARE cursor_name CURSOR FOR select_statement This statement declares a cursor and associates it with a SELECT statement that retrieves the rows to be traversed by the cursor. The number of columns retrieved by the SELECT statement must match the ...
https://dev.mysql.com/doc/refman/5.7/en/declare-local-variable.html
type [DEFAULT value] This statement declares local variables within stored programs. To provide a default value for a variable, include a DEFAULT clause. The value can be specified as an expression; it need not be a constant. If the DEFAULT clause ...
https://dev.mysql.com/doc/refman/5.7/en/document-store-shell-install.html
This section describes how to download, install, and start MySQL Shell, which is an interactive JavaScript, Python, or SQL interface supporting development and administration for the MySQL Server. Requirements MySQL Shell is available on Microsoft ...
https://dev.mysql.com/doc/refman/5.7/en/drop-function-loadable.html
DROP FUNCTION [IF EXISTS] function_name This statement drops the loadable function named function_name. (DROP FUNCTION is also used to drop stored functions; see Section 13.1.27, “DROP PROCEDURE and DROP FUNCTION Statements”.) DROP FUNCTION is ...
https://dev.mysql.com/doc/refman/5.7/en/drop-trigger.html
DROP TRIGGER [IF EXISTS] [schema_name.]trigger_name This statement drops a trigger. If the schema is omitted, the trigger is dropped from the default schema. DROP TRIGGER requires the TRIGGER privilege for the table associated with the trigger. Use ...
https://dev.mysql.com/doc/refman/5.7/en/error-handling.html
This appendix describes the types of error information MySQL provides and how to obtain information about them. It describes common problems and errors that may occur and potential resolutions.
https://dev.mysql.com/doc/refman/5.7/en/error-interfaces.html
For example, (using the mysql client), a failure to connect to the server might result in this message: $> mysql -h no-such-host ERROR 2005 (HY000): Unknown MySQL server host 'no-such-host' (0) Command-Line Error Message Interface The perror program ... Error messages can originate on the server side or the client side, and each error message includes an error code, SQLSTATE value, and message string, as described in Section B.1, “Error Message Sources and ...