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https://dev.mysql.com/doc/refman/8.0/en/sorted-index-builds.html
When the sort buffer becomes full, entries are sorted and written out to a temporary intermediate file. In the second phase, with one or more runs written to the temporary intermediate file, a merge sort is performed on all entries in the file. This ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-events-statements-current-table.html
SOURCE The name of the source file containing the instrumented code that produced the event and the line number in the file at which the instrumentation occurs. CURRENT_SCHEMA The default database for the statement, NULL if there is none. For use ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-functions-for-member-actions.html
The server must be writeable (with the read_only system variable set to OFF) and have the Group Replication plugin installed. When the feature is active and correctly configured, if the primary that is replicating goes offline or into an error ...
https://dev.mysql.com/doc/refman/8.0/en/gis-polygon-property-functions.html
If any geometry argument is not a syntactically well-formed geometry, an ER_GIS_INVALID_DATA error occurs. For functions that take multiple geometry arguments, if those arguments are not in the same SRS, an ER_GIS_DIFFERENT_SRIDS error occurs. As of ...Unless otherwise specified, functions in this section handle their geometry arguments as follows: If any argument is NULL or any geometry argument is an empty geometry, the return value is ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-replication-applier-status-by-coordinator-table.html
LAST_ERROR_NUMBER, LAST_ERROR_MESSAGE The error number and error message of the most recent error that caused the SQL/coordinator thread to stop. If the LAST_ERROR_MESSAGE value is not empty, the error values also appear in the replica's error log.
https://dev.mysql.com/doc/refman/8.0/en/version-tokens-reference.html
(It is not an error to delete nonexisting tokens.) To clear the token list entirely without knowing which tokens are in the list, pass NULL or a string containing no tokens to version_tokens_set(): mysql> SELECT version_tokens_set(NULL); ... The ...
https://dev.mysql.com/doc/refman/8.0/en/replication-channels.html
When transactions from a source are received by a channel's receiver thread, they are added to the channel's relay log file and passed through to the channel's applier threads. The error codes and messages that are issued when multi-source ...The ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-replication-connection-status-table.html
LAST_ERROR_NUMBER, LAST_ERROR_MESSAGE The error number and error message of the most recent error that caused the I/O thread to stop. An error number of 0 and message of the empty string mean “no error.” If the LAST_ERROR_MESSAGE value is not ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-limitations-functions.html
(Bug #54483) See Section 14.6.2, “Mathematical Functions”, for more information about the return types of these functions, as well as Section 13.1, “Numeric Data Types”. Each of these functions returns an integer only if it is passed an ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-management-hash-key.html
Tables which are partitioned by hash or by key are very similar to one another with regard to making changes in a partitioning setup, and both differ in a number of ways from tables which have been partitioned by range or list. For that reason, ...