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https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-programs-ndbmtd.html
Trace files are generated by critical errors in ndbmtd processes in a somewhat different fashion from how these are generated by ndbd failures. Like ndbd, ndbmtd generates a set of log files which are placed in the directory specified by DataDir in ... ndbmtd is a multithreaded version of ndbd, the process that is used to handle all the data in tables using the NDBCLUSTER storage ...
https://dev.mysql.com/doc/refman/5.7/en/upgrading-from-previous-series.html
If it is not possible to modify an offending query (for example, if it is generated by a third-party application), set the sql_mode system variable at server startup to not enable ONLY_FULL_GROUP_BY. System Table Changes Incompatible change: The ...
https://dev.mysql.com/doc/refman/5.7/en/load-data.html
Unless REPLACE is also specified, LOCAL has the same effect as the IGNORE modifier on the interpretation of input file contents and error handling; see Duplicate-Key and Error Handling, and Column Value Assignment. LOAD DATA interprets all fields in ...The file can be read from the server host or the client host, depending on whether the LOCAL modifier is ...
https://dev.mysql.com/doc/refman/5.7/en/json.html
JSON columns, like columns of other binary types, are not indexed directly; instead, you can create an index on a generated column that extracts a scalar value from the JSON column. See Indexing a Generated Column to Provide a JSON Column Index, for ...The JSON data type provides these advantages over storing JSON-format strings in a string column: Automatic validation of JSON documents stored in JSON ...
https://dev.mysql.com/doc/refman/5.7/en/explain-output.html
When all tables are processed, MySQL outputs the selected columns and backtracks through the table list until a table is found for which there are more matching rows. Also, for SELECT statements, EXPLAIN generates extended information that can be ...
https://dev.mysql.com/doc/refman/5.7/en/data-masking-usage.html
Note The examples here supply function arguments using the random value generation functions that return the appropriate type of value. For more information about generation functions, see Generating Random Data with Specific Characteristics.
https://dev.mysql.com/doc/refman/5.7/en/mysql-install-db.html
Secure-by-Default Deployment Current versions of mysql_install_db produce a MySQL deployment that is secure by default, with these characteristics: A single administrative account named 'root'@'localhost' is created with a randomly generated ...
https://dev.mysql.com/doc/refman/5.7/en/mysqldump.html
NULL, 'NULL', and Empty Values: For a column named column_name, the NULL value, an empty string, and the string value 'NULL' are distinguished from one another in the output generated by this option as follows. The mysqldump command can also ... The ...
https://dev.mysql.com/doc/refman/5.7/en/miscellaneous-functions.html
Note To store values generated by INET_ATON(), use an INT UNSIGNED column rather than INT, which is signed. There are multiple ways to cause MySQL to accept the query: Alter the table to make name a primary key or a unique NOT NULL column. This may ...The function return value and type are the same as the return value and type of its argument, but the function result is not checked for the ONLY_FULL_GROUP_BY SQL ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-replication-conflict-resolution.html
This column should be defined as follows: NDB$ORIG_TRANSID BIGINT UNSIGNED NOT NULL NDB$ORIG_TRANSID is a 64-bit value generated by NDB. Requirements Source Column Control Conflict Resolution Control Conflict Resolution Functions Conflict ...These ...