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https://dev.mysql.com/doc/refman/8.0/en/charset-errors.html
This section describes how the MySQL server uses character sets for constructing error messages. For information about the language of error messages (rather than the character set), see Section 12.12, “Setting the Error Message Language”. For ...Character (nonbinary) string values are converted from their character set to ...
https://dev.mysql.com/doc/refman/8.0/en/subquery-errors.html
Incorrect number of rows from subquery: ERROR 1242 (ER_SUBSELECT_NO_1_ROW) SQLSTATE = 21000 Message = "Subquery returns more than 1 row" This error occurs for statements where the subquery must return at most one row but returns multiple rows. For ...If the subquery returns more than one row, error 1242 ...Consider the following example: SELECT * FROM t1 WHERE column1 = (SELECT column1 FROM t2); If SELECT ...
https://dev.mysql.com/doc/refman/8.0/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/8.0/en/error-log-syslog.html
To enable the system log sink, first load the sink component, then modify the log_error_services value: INSTALL COMPONENT 'file://component_log_sink_syseventlog'; SET PERSIST log_error_services = 'log_filter_internal; log_sink_syseventlog'; To set ... It is possible to have mysqld write the error log to the system log (the Event Log on Windows, and syslog on Unix and Unix-like ...
https://dev.mysql.com/doc/refman/8.0/en/error-log-json.html
To enable the JSON sink, first load the sink component, then modify the log_error_services value: INSTALL COMPONENT 'file://component_log_sink_json'; SET PERSIST log_error_services = 'log_filter_internal; log_sink_json'; To set log_error_services to ... This section describes how to configure error logging using the built-in filter, log_filter_internal, and the JSON sink, log_sink_json, to take effect immediately and for subsequent server ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndb-transporter-errors.html
This section lists error codes, names, and messages that are written to the cluster log in the event of transporter errors. 0x00 TE_NO_ERROR No error 0x01 TE_ERROR_CLOSING_SOCKET Error found during closing of socket 0x02 ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-limitations-error-handling.html
The stopping or failure of any data node can result in a number of different node failure errors. (However, there should be no aborted transactions when performing a planned shutdown of the cluster.) In either of these cases, any errors that are ...
https://dev.mysql.com/doc/refman/8.0/en/error-log.html
This section discusses how to configure the MySQL server for logging of diagnostic messages to the error log. For information about selecting the error message character set and language, see Section 12.6, “Error Message Character Set”, and ...
https://dev.mysql.com/doc/refman/8.0/en/show-errors.html
SHOW ERRORS [LIMIT [offset,] row_count] SHOW COUNT(*) ERRORS SHOW ERRORS is a diagnostic statement that is similar to SHOW WARNINGS, except that it displays information only for errors, rather than for errors, warnings, and notes. You can also ...
https://dev.mysql.com/doc/refman/8.0/en/communication-errors.html
If connection problems occur such as communication errors or aborted connections, use these sources of information to diagnose problems: The error log. If the log_error_verbosity system variable is set to 3, you might find messages like this in ...