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https://dev.mysql.com/doc/refman/8.4/en/switchable-optimizations.html
For more information, see Section 10.2.2.5, “Derived Condition Pushdown Optimization” Derived Table Merging Flags derived_merge (default on) Controls merging of derived tables and views into outer query block. The derived_merge flag controls ...
https://dev.mysql.com/doc/heatwave/en/mys-hw-lakehouse-incremental-load.html
Available as of MySQL 9.0.0, Lakehouse Incremental Load allows you to refresh the data in an external table. To run Lakehouse Incremental Load, load the data using Lakehouse Auto Parallel Load and set the Auto Parallel Load refresh_external_tables ...This topic contains the following sections: Before You Begin Refresh Data Overview Perform Initial Load Refresh Data What's Next Before You Begin Load structured data using Lakehouse Auto Parallel Load or ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-online-add-node-example.html
You can verify that all existing data nodes were restarted using the updated configuration by checking the ndbinfo.nodes table in the mysql client. ALGORITHM=INPLACE, REORGANIZE PARTITION does not work on tables that were created with the MAX_ROWS ... In this section we provide a detailed example illustrating how to add new NDB Cluster data nodes online, starting with an NDB Cluster having 2 data nodes in a single node group and concluding with a cluster having 4 data nodes in 2 node ...
https://dev.mysql.com/doc/heatwave/en/mys-hwaml-learn-with-genai.html
To generate AutoML queries, NL2ML leverages the databases, tables, and table columns in the DB System. This includes detailed instructions to do the following: Join your dataset's various tables into a single table. If table and column names are ...
https://dev.mysql.com/doc/refman/8.4/en/insert-select.html
| TABLE table_name | VALUES row_constructor_list } [ON DUPLICATE KEY UPDATE assignment_list] value: {expr | DEFAULT} value_list: value [, value] ... SELECT, you can quickly insert many rows into a table from the result of a SELECT statement, which ... INSERT [LOW_PRIORITY | HIGH_PRIORITY] [IGNORE] [INTO] tbl_name [PARTITION (partition_name [, partition_name] ...)] [(col_name [, col_name] ...)] { SELECT ...
https://dev.mysql.com/doc/refman/8.4/en/request-access.html
This is where the privilege columns in the grant tables come into play. These privileges can come from any of the user, global_grants, db, tables_priv, columns_priv, or procs_priv tables. (You may find it helpful to refer to Section 8.2.3, “Grant ... After the server accepts a connection, it enters Stage 2 of access ...
https://dev.mysql.com/doc/heatwave/en/mys-hwaml-ml-train.html
table_name: The name of the table that contains the labeled training dataset. The table name must be valid and fully qualified, so it must include the database name, database_name.table_name. The table cannot exceed 10 GB, 100 million rows, or 1017 ... Run the ML_TRAIN routine on a training dataset to produce a trained machine learning ...
https://dev.mysql.com/doc/refman/8.4/en/semijoins-antijoins.html
A semijoin is a preparation-time transformation that enables multiple execution strategies such as table pullout, duplicate weedout, first match, loose scan, and materialization. For an inner join between two tables, the join returns a row from one ...The optimizer uses semijoin strategies to improve subquery execution, as described in this ...
https://dev.mysql.com/doc/refman/8.4/en/explain.html
In practice, the DESCRIBE keyword is more often used to obtain information about table structure, whereas EXPLAIN is used to obtain a query execution plan (that is, an explanation of how MySQL would execute a query). By default, DESCRIBE displays ...
https://dev.mysql.com/doc/refman/8.4/en/information-schema-optimization.html
Applications that monitor databases may make frequent use of INFORMATION_SCHEMA tables. To write queries for these tables most efficiently, use the following general guidelines: Try to query only INFORMATION_SCHEMA tables that are views on data ...