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https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-online-operations.html
row *************************** Level: Warning Code: 1478 Message: DYNAMIC column c4 with STORAGE DISK is not supported, column will become FIXED mysql> SHOW CREATE TABLE t1\G *************************** 1. If you attempt to add a column online ...
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/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/audit-log-file-formats.html
To see the associations between error codes, SQLSTATE values, and messages, see Server Error Message Reference. Example: <STATUS>1051</STATUS> <STATUS_CODE> An unsigned integer representing the command status: 0 for success, 1 if an error occurred.
https://dev.mysql.com/doc/refman/8.0/en/create-index.html
For a unique index, an error occurs regardless of SQL mode because reducing the index length might enable insertion of nonunique entries that do not meet the specified uniqueness requirement. An error occurs if a key part definition contains ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-what-is-new.html
Instead, use ndb_perror to obtain error message information from NDB error codes. Beginning with this release, MySQL NDB Cluster is being developed in parallel with the standard MySQL 8.0 server under a new unified release model with the following ... The following sections describe changes in the implementation of MySQL NDB Cluster in NDB Cluster 8.0 through 8.0.44, as compared to earlier release ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-system-variables.html
performance_schema_error_size Command-Line Format --performance-schema-error-size=# System Variable performance_schema_error_size Scope Global Dynamic No SET_VAR Hint Applies No Type Integer Default Value number of server error codes Minimum Value 0 ...Although the value can be set anywhere from 0 to its maximum, the intended use is to set it to either its default (to instrument all errors) or 0 (to instrument no ...