Under Sources, click Reverse ETL and select MySQL.
Configure warehouse credentials
You can choose to proceed with your existing warehouse credentials if you have configured them in the RudderStack dashboard previously. Otherwise, click Add new credentials to add new credentials for your warehouse.
Host: Enter the host name of your MySQL instance.
Port: Enter the port number associated with the MySQL database instance.
Database: Enter the database name in your MySQL instance from where RudderStack ingests the data.
User: Enter the user name of your MySQL instance.
Password: Enter the password for the above user.
SSL Mode: Select the SSL mode from false or skip-verify depending on how RudderStack should connect to your MySQL instance.
Under Select your source type, choose Table and specify the below fields:
Schema: Select the warehouse schema from the dropdown.
Table: Choose the required table from which RudderStack syncs the data.
Primary key: Select the column from the above table that uniquely identifies your records in the warehouse.
RudderStack uses the primary key column for diffing in case of incremental syncs. You can generate it by:
Generating your table with a primary key, OR
Creating a table view
You can use a composite key in cases where one column cannot be considered as a primary key. For example, you can a declare a composite key of user_id and timestamp by creating a view on your warehouse table.
Under Select your source type, choose Model and click Continue.
To configure a model as source:
Enter an optional description and specify the custom SQL query in Query section.
Click Run Query to fetch the data preview.
Select the Primary key to use a column that uniquely identifies your warehouse records.
You can set a primary key only after you run the SQL query successfully using the Run Query option.
RudderStack uses the primary key column for diffing in case of incremental syncs. You can generate it by:
Generating your table with a primary key, OR
Creating a table view
You can use a composite key in cases where one column cannot be considered as a primary key. For example, you can a declare a composite key of user_id and timestamp in SQL query of the model.
You cannot delete a source that is connected to any destination.
FAQ
What do the three validations under Verifying Credentials imply?
When setting up a Reverse ETL source, you will see the following three validations under the Verifying Credentials option once you proceed after entering the warehouse credentials:
These options are explained below:
Verifying Connection: This option indicates that RudderStack is trying to connect to the warehouse with the provided warehouse credentials.
If this option gives an error, it means that one or more fields specified in the warehouse credentials are incorrect. Verify your credentials in this case.
Able to List Schema: This option checks if RudderStack is able to fetch all schema details by using the provided credentials.
Able to Access RudderStack Schema: This option implies that RudderStack is able to access the _rudderstack schema you have created by running all commands in the User Permissions section.
If this option gives an error, verify if you have successfully created the _rudderstack schema and given RudderStack the required permissions to access it.
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