Link to a MySQL Database¶
Table 1 lists the parameters for a link to a MySQL database.
Parameter | Description | Example Value |
|---|---|---|
Name | Link name, which should be defined based on the data source type, so it is easier to remember what the link is for | mysql_link |
Database Server | IP address or domain name of the database to connect Click Select next to the text box and select a MySQL DB instance in the displayed dialog box. | 192.168.0.1 |
Port | Port of the database to connect | 3306 |
Database Name | Name of the database to connect | dbname |
Username | Username used for accessing the database This account must have the permissions required to read and write data tables and metadata. | cdm |
Password | Password of the user |
|
Use Local API | (Optional) Whether to use the local API of the database for acceleration. When you create a MySQL link, CDM automatically enables the local_infile system variable of the MySQL database to enable the LOAD DATA function, which accelerates data import to the MySQL database. If CDM fails to enable this function, contact the database administrator to enable the local_infile system variable. Alternatively, set Use Local API to No to disable API acceleration. If data is imported to RDS for MySQL, the LOAD DATA function is disabled by default. In such a case, you need to modify the parameter group of the MySQL instance and set local_infile to ON to enable the LOAD DATA function. Note If local_infile on RDS is uneditable, it is the default parameter group. You need to create a parameter group, modify its values, and apply it to the RDS for MySQL instance. For details, see the Relational Database Service User Guide. | Yes |
Use Agent | Whether to extract data from the data source through an agent | Yes |
Agent | Click Select and select the agent created in Managing Agents. |
|
Driver Version | Select a driver version that adapts to the database type. |
|
Fetch Size | (Optional) Displayed when you click Show Advanced Attributes. Number of rows obtained by each request. Set this parameter based on the data source and the job's data size. If the value is either too large or too small, the job may run for a long time. | 1000 |
Commit Size | (Optional) Displayed when you click Show Advanced Attributes. Number of records submitted each time. Set this parameter based on the data destination and the job's data size. If the value is either too large or too small, the job may run for a long time. |
|
SSL Encryption | (Optional) If you set this parameter to Yes, CDM can connect to the database (on-premises databases excluded) in SSL encryption mode. | Yes |
Link Attributes | (Optional) Click Add to add the JDBC connector attributes of multiple specified data sources. For details, see the JDBC connector document of the corresponding database. Note By default, useCursorFetch is enabled, indicating that the JDBC connector communicates with relational databases using the binary protocol. The open-source MySQL database supports the useCursorFetch parameter. You do not need to set this parameter. | sslmode=require |
Reference Sign | (Optional) Delimiter between the names of the referenced tables or columns. For details, see the product documentation of the corresponding database. | ' |