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https://dev.mysql.com/doc/refman/8.0/en/sys-schema-views.html
The view with the x$ prefix that displays the same values in raw form is intended more for use with other tools that perform their own processing on the data. The sys schema contains many views that summarize Performance Schema tables in various ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-replication-tables.html
It refers to the master.info file used for the replica's source metadata repository, which has been superseded by the use of crash-safe tables for the repository. For multithreaded replica operation, SHOW REPLICA STATUS reports all coordinator and ...This is similar to the information available from the SHOW REPLICA STATUS statement, but representation in table form is more accessible and has usability benefits: SHOW REPLICA STATUS output is useful for visual inspection, but not so much for programmatic ...
https://dev.mysql.com/doc/refman/8.0/en/json-validation-functions.html
If at least one of the arguments is not valid JSON, the function raises an error (ER_INVALID_TYPE_FOR_JSON) In addition, if the schema is not a valid JSON object, the function returns ER_INVALID_JSON_TYPE. The schema must be a valid JSON object; the ... Beginning with MySQL 8.0.17, MySQL supports validation of JSON documents against JSON schemas conforming to Draft 4 of the JSON Schema ...
https://dev.mysql.com/doc/refman/8.0/en/cannot-find-table.html
Even for file systems that are not case-sensitive, such as on Windows, all references to a given table within a query must use the same lettercase. You can check which tables are in the default database with SHOW TABLES.
https://dev.mysql.com/doc/refman/8.0/en/declare-condition.html
DECLARE condition_name CONDITION FOR condition_value condition_value: { mysql_error_code | SQLSTATE [VALUE] sqlstate_value } The DECLARE ... It can take the following forms: mysql_error_code: An integer literal indicating a MySQL error code. Do not ...CONDITION statement declares a named error condition, associating a name with a condition that needs specific ...
https://dev.mysql.com/doc/refman/8.0/en/administrative-connection-interface.html
These lines in the server my.cnf file enable the administrative interface on the loopback interface and configure it to use port number 33064 (that is, a port different from the default): [mysqld] admin_address=127.0.0.1 admin_port=33064 MySQL ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-programs-ndb-size-pl.html
This is a Perl script that can be used to estimate the amount of space that would be required by a MySQL database if it were converted to use the NDBCLUSTER storage engine. However, it does need to access the MySQL server on which the database to ...Unlike the other utilities discussed in this section, it does not require access to an NDB Cluster (in fact, there is no reason for it to do ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-shell-tutorial-javascript-download.html
You can either: Start MySQL Shell in SQL mode and import the file by issuing: mysqlsh -u root --sql --file /tmp/world_x-db/world_x.sql Enter password: **** Set MySQL Shell to SQL mode while it is running and source the schema file by issuing: \sql ... As part of this quick-start guide, an example schema is provided which is referred to as the world_x ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-shell-tutorial-python-download.html
You can either: Start MySQL Shell in SQL mode and import the file by issuing: mysqlsh -u root --sql --file /tmp/world_x-db/world_x.sql Enter password: **** Set MySQL Shell to SQL mode while it is running and source the schema file by issuing: \sql ... As part of this quick-start guide, an example schema is provided which is referred to as the world_x ...
https://dev.mysql.com/doc/refman/8.0/en/no-matching-rows.html
You can create a test file by dumping the tables with mysqldump --quick db_name tbl_name_1 ... Open the file in an editor, remove some insert lines (if there are more than needed to demonstrate the problem), and add your SELECT statement at the end ... If you have a complicated query that uses many tables but that returns no rows, you should use the following procedure to find out what is wrong: Test the query with EXPLAIN to check whether you can find something that is obviously ...