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https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-replication-schema.html
Note When performing schema changes on NDB tables, applications should wait until the ALTER TABLE statement has returned in the MySQL client connection that issued the statement before attempting to use the updated definition of the table.
https://dev.mysql.com/doc/refman/5.7/en/gis-polygon-property-functions.html
If the argument is NULL or an empty geometry, the return value is NULL. If the argument is an empty geometry collection, the return value is NULL. If the argument is NULL or an empty geometry, the return value is NULL. If the argument is NULL or an ... Functions in this section return properties of Polygon or MultiPolygon ...
https://dev.mysql.com/doc/refman/5.7/en/gis-linestring-property-functions.html
If the argument is NULL or an empty geometry, the return value is NULL. If the argument is NULL or an empty geometry, the return value is NULL. If the argument is NULL or an empty geometry, the return value is NULL. If the argument is NULL or an ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-programs-ndb-desc.html
ndb_desc provides a detailed description of one or more NDB tables. Usage ndb_desc -c connection_string tbl_name -d db_name [options] ndb_desc -c connection_string index_name -d db_name -t tbl_name Additional options that can be used with ndb_desc ...
https://dev.mysql.com/doc/refman/5.7/en/json-modification-functions.html
All members of the second object which do not have a corresponding key in the first object, and whose value is not the JSON null literal. All members with a key that exists in both the first and the second object, and whose value in the second ...
https://dev.mysql.com/doc/refman/5.7/en/sql-mode.html
If this mode is not enabled, division by zero inserts NULL and produces no warning. If this mode is enabled, division by zero inserts NULL and produces a warning. For INSERT IGNORE and UPDATE IGNORE, division by zero inserts NULL and produces a ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-information-schema-metrics-table.html
Because no DML operations have been performed, the counter values are zero or NULL. row *************************** NAME: dml_inserts SUBSYSTEM: dml COUNT: 0 MAX_COUNT: 0 MIN_COUNT: NULL AVG_COUNT: 0 COUNT_RESET: 0 MAX_COUNT_RESET: 0 ... The ...
https://dev.mysql.com/doc/refman/5.7/en/mysqldump.html
It is always enabled and attempting to disable it (--skip-secure-auth, --secure-auth=0) produces an error. NULL, 'NULL', and Empty Values: For a column named column_name, the NULL value, an empty string, and the string value 'NULL' are distinguished ... The mysqldump client utility performs logical backups, producing a set of SQL statements that can be executed to reproduce the original database object definitions and table ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-information-schema-fulltext_index-tables.html
When OPTIMIZE TABLE is run, the INNODB_FT_BEING_DELETED table is emptied, and DOC_ID values are removed from the INNODB_FT_DELETED table. INNODB_FT_BEING_DELETED: Provides a snapshot of the INNODB_FT_DELETED table; it is used only during an OPTIMIZE ...
https://dev.mysql.com/doc/refman/5.7/en/group-by-modifiers.html
These rows have the country and products columns set to NULL. This row has the year, country, and products columns set to NULL. The NULL indicators in each super-aggregate row are produced when the row is sent to the client. For any column in the ...