You can use the SQL Gateway to configure a MySQL remoting service and set up federated tables for Amazon S3 data. The service is a daemon process that provides a MySQL interface to the CData ODBC Driver for Amazon S3: After you have started the service, you can create a server and tables using the FEDERATED Storage Engine in MySQL. You can then work with Amazon S3 data just as you would local MySQL tables.
If you have not already done so, provide values for the required connection properties in the data source name (DSN). You can use the built-in Microsoft ODBC Data Source Administrator to configure the DSN. This is also the last step of the driver installation. See the "Getting Started" chapter in the help documentation for a guide to using the Microsoft ODBC Data Source Administrator to create and configure a DSN.
To authorize Amazon S3 requests, provide the credentials for an administrator account or for an IAM user with custom permissions. Set AccessKey to the access key Id. Set SecretKey to the secret access key.
Note: You can connect as the AWS account administrator, but it is recommended to use IAM user credentials to access AWS services.
For information on obtaining the credentials and other authentication methods, refer to the Getting Started section of the Help documentation.
See the SQL Gateway Overview to set up connectivity to Amazon S3 data as a virtual MySQL database. You will configure a MySQL remoting service that listens for MySQL requests from clients. The service can be configured in the SQL Gateway UI.
After you have configured and started the service, create a FEDERATED server to simplify the process of creating FEDERATED tables:
The following statement will create a FEDERATED server based on the ODBC Driver for Amazon S3. Note that the username and password of the FEDERATED server must match a user account you defined on the Users tab of the SQL Gateway.
CREATE SERVER fedAmazonS3 FOREIGN DATA WRAPPER mysql OPTIONS (USER 'sql_gateway_user', PASSWORD 'sql_gateway_passwd', HOST 'sql_gateway_host', PORT ####, DATABASE 'CData AmazonS3 Sys');
To create a FEDERATED table using our newly created server, use the CONNECTION keyword and pass the name of the FEDERATED server and the remote table (ObjectsACL). Refer to the following template for the statement to create a FEDERATED table:
CREATE TABLE fed_objectsacl ( ..., name TYPE(LEN), ownerid TYPE(LEN), ..., ) ENGINE=FEDERATED DEFAULT CHARSET=latin1 CONNECTION='fedAmazonS3/objectsacl';
NOTE: The table schema for the FEDERATED table must match the remote table schema exactly. You can always connect directly to the MySQL remoting service using any MySQL client and run a SHOW CREATE TABLE query to get the table schema.
You can now execute queries to the Amazon S3 FEDERATED tables from any tool that can connect to MySQL, which is particularly useful if you need to JOIN data from a local table with data from Amazon S3. Refer to the following example:
SELECT fed_objectsacl.name, local_table.custom_field FROM local_table JOIN fed_objectsacl ON local_table.foreign_name = fed_objectsacl.name;
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