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https://dev.mysql.com/doc/refman/8.0/en/performance-schema-replication-applier-status-by-worker-table.html
All error codes and messages displayed in the columns relating to errors correspond to error values listed in Server Error Message Reference. LAST_ERROR_NUMBER, LAST_ERROR_MESSAGE The error number and error message of the most recent error that ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-range.html
In much the same fashion, you could partition the table based on employee job codes—that is, based on ranges of job_code column values. A table that is partitioned by range is partitioned in such a way that each partition contains rows for which ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-status-monitoring.html
All the historical data generated by the plugin code is still available, but new events for the instruments are not collected. If the value chosen for performance_schema_max_mutex_classes is too small, no error is reported in the error log and there ...Names for these variables have several forms: Performance_schema_xxx_classes_lost indicates how many instruments of type xxx could not be ...
https://dev.mysql.com/doc/refman/8.0/en/json-table-functions.html
name type PATH string_path [on_empty] [on_error]: Columns of this type are used to extract values specified by string_path. Saving an object or array triggers the optional on error clause; this also occurs when an error takes place during coercion ... This section contains information about JSON functions that convert JSON data to tabular ...
https://dev.mysql.com/doc/refman/8.0/en/charset-unicode-utf32.html
Also, unlike utf16, there are no tricks for encoding in utf32, so the stored value equals the code value. There is in fact only one validity check for utf32: No code value may be greater than 0x10ffff. The utf32 character set is fixed length (like ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-setup-instruments-table.html
Each instrument added to the source code provides a row for the setup_instruments table, even when the instrumented code is not executed. If an enabled instrument is not timed, the instrument code is enabled, but the timer is not. The ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema.html
The PERFORMANCE_SCHEMA storage engine collects event data using “instrumentation points” in server source code. Data collection is implemented by modifying the server source code to add instrumentation. Execution of server code proceeds normally ... The MySQL Performance Schema is a feature for monitoring MySQL Server execution at a low ...
https://dev.mysql.com/doc/refman/8.0/en/data-masking-plugin-functions.html
Return value: The masked Social Security number as a string, or an error if the argument is not the correct length. For example, gen_rnd_us_phone() returns a US phone number that uses the 555 area code, which is not assigned to phone numbers in ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-parameters.html
For example, you might change the port that memcached listens on, reduce the maximum number of simultaneous connections, change the maximum memory size for a key-value pair, or enable debugging messages for the error log. When specifying a file name ... InnoDB Startup Options InnoDB System Variables System variables that are true or false can be enabled at server startup by naming them, or disabled by using a --skip- ...
https://dev.mysql.com/doc/refman/8.0/en/spatial-convenience-functions.html
If any geometry argument is not a syntactically well-formed geometry, an ER_GIS_INVALID_DATA error occurs. If any geometry argument is a syntactically well-formed geometry in an undefined spatial reference system (SRS), an ER_SRS_NOT_FOUND error ...