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https://dev.mysql.com/doc/refman/8.4/en/controlling-query-plan-evaluation.html
For join queries, the number of possible plans investigated by the MySQL optimizer grows exponentially with the number of tables referenced in a query. However, when larger queries are submitted, the time spent in query optimization may easily ...
https://dev.mysql.com/doc/heatwave/en/mys-hw-lakehouse-export-query-results-parquet-json.html
This topic shows the different ways to export query results to Parquet files. INTO OUTFILE WITH PARAMETERS 'file_URI_JSON "file": begin-array ("uri": "OCIFS_URI") | ("uri": "PAR_URI") | ("uri": "NATIVE_URI"), [, "dialect": begin-object ...
https://dev.mysql.com/doc/heatwave-aws/en/heatwave-aws-deploying-query-privatelink.html
Once these network components are configured, your applications connect to your DB System through the VPC Endpoint using a Private Hostname that is only visible within the VPC where the Endpoint exists. Figure 6-1 illustrates the different ...
https://dev.mysql.com/doc/heatwave/en/mys-hw-query-prerequisites.html
Ensure that the following requirements are met before offloading queries to MySQL HeatWave: Use a SELECT statement. To check the autocommit setting: mysql> SHOW VARIABLES LIKE 'autocommit'; +---------------+-------+ | Variable_name | Value | ...
https://dev.mysql.com/doc/mysql-monitor/8.0/en/main-queries-reference.html
The main queries enable you to retrieve data from the monitored server. When defining queries, the following restrictions apply: The query must be defined within a <![CDATA[]]> container. Do not define queries which take longer to run than the ...
https://dev.mysql.com/doc/heatwave/en/mys-hw-lakehouse-export-query-results-json-json.html
The option to export query results as an ND-JSON file is available as of MySQL 9.3.1. This topic shows the different ways to export query results as an ND-JSON file. INTO OUTFILE WITH PARAMETERS 'file_URI_JSON "file": begin-array ("uri": ...
https://dev.mysql.com/doc/heatwave-aws/en/heatwave-aws-hw-queries.html
Running MySQL HeatWave Queries 10.1 Running MySQL HeatWave Queries When a MySQL HeatWave Cluster is enabled and the data you want to query is loaded in MySQL HeatWave, queries that qualify are automatically offloaded from the MySQL DB System to the ...Simply run the query from the Query Editor, as described above, or from a MySQL client that is connected to the DB ...
https://dev.mysql.com/doc/connectors/en/connector-j-query-attributes.html
Connector/J supports Query Attributes when it has been enabled on the server by installing the query_attributes component (see Prerequisites for Using Query Attributes for details). Attributes are set for a query by using the setAttribute() method ...
https://dev.mysql.com/doc/heatwave/en/mys-hw-dynamic-query-offload.html
As of MySQL 9.0.0, MySQL HeatWave uses dynamic query offload to choose the optimal execution engine for queries based on query and execution engine characteristics, which achieves improved performance. The overhead for more complex queries is also ... Before MySQL 9.0.0, MySQL HeatWave uses a query cost threshold to choose either INNODB or MySQL HeatWave as the execution engine for the ...
https://dev.mysql.com/doc/heatwave/en/mys-hw-lakehouse-export-query-results-Parquet-non-json.html
This topic shows the different ways to export query results as a Parquet file with SQL syntax. Before You Begin Review the following: Overview of Exporting Query Results Requirements to Export Query Results Syntax Use the following SQL SELECT INTO ...