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https://dev.mysql.com/doc/refman/8.4/en/problems-connecting.html
In this case, the host name must be specified in a user table row on the server host, even though you are running the client program on the same host as the server. Normally, you should have one row in the user table that exactly matches the host ...
https://dev.mysql.com/doc/refman/8.4/en/select-into.html
INTO DUMPFILE writes a single row to a file without any formatting. If the query returns no rows, a warning with error code 1329 occurs (No data), and the variable values remain unchanged. If the query returns multiple rows, error 1172 occurs ...
https://dev.mysql.com/doc/refman/8.4/en/static-format.html
The expected row length in bytes for static-sized rows is calculated using the following expression: row length = 1 + (sum of column lengths) + (number of NULL columns + delete_flag + 7)/8 + (number of variable-length columns) delete_flag is 1 for ...It is also the fastest of the on-disk formats due to the ease with which rows in the data file can be found on disk: To look up a row based on a row number in the index, multiply the row number by the row length to calculate the row ...
https://dev.mysql.com/doc/internals/en/good-tests.html
There are a lot of strict rules and rules of thumb which may increase the quality of tests written for the tool pair mysqltest/mysqltest-run.pl (MTR). See the Writing Test Cases section of the MySQL Server Doxygen documentation, available at ...
https://dev.mysql.com/doc/internals/en/item-class.html
MySQL's Item class is defined in .../sql/item.h, and its subclasses are defined in .../sql/item*.h (that is, in item.h, item_cmpfunc.h, item_func.h, item_geofunc.h, item_row.h, item_strfunc.h, item_subselect.h, item_sum.h, item_timefunc.h). To us, ...
https://dev.mysql.com/doc/internals/en/select-union.html
Merging types of result fields and storing them in special Items (Item_type_holder) will be done in this loop, too. st_select_lex_unit::exec Delete rows from the temporary table if this is not the first call. We will need this object to store in ...
https://dev.mysql.com/doc/mysql-em-plugin/en/myoem-performance-page-database-file-io.html
Rows for which the HOST column in the underlying Performance Schema table is NULL are assumed to be for background threads and are reported with a host name of background. Redo Log Waits Graphs the number of times the log buffer was too small and ...
https://dev.mysql.com/doc/heatwave/en/mys-hwaml-classification-score.html
You should also use a larger number of records for training and validation to get a valid score. mysql> SELECT @classification_score; +-----------------------+ | @classification_score | +-----------------------+ | 0.800000011920929 | ... After ...
https://dev.mysql.com/doc/heatwave/en/mys-hwaml-regression-score.html
You should also use a larger number of records for training and validation to get a valid score. mysql> SELECT @regression_score; +--------------------+ | @regression_score | +--------------------+ | 0.8438237905502319 | +--------------------+ 1 row ... After generating predictions and explanations, you can score the model to assess its ...
https://dev.mysql.com/doc/heatwave/en/mys-hwaml-scoring-a-forecasting-model.html
You should also use a larger number of records for training and validation to get a valid score. mysql> SELECT @forecasting_score; +----------------------+ | @forecasting_score | +----------------------+ | -0.06810028851032257 | ... After generating ...