Checking Whether the Source Database Version Is Supported

**Table 1** Checking whether the source database version is supported
Check Item	Whether the source database version is supported
Description	Check whether the source database version is MySQL 5.5.x, MySQL 5.6.x, and MySQL 5.7.x.
Failure Cause and Handling Suggestion	Failure cause: The source database version is not supported. Handling suggestion: Export data and then import it following the instructions provided in the "Migrating MySQL Data Using mysqldump" section in the Relational Database Service User Guide.
	Failure cause: Insufficient user permissions Handling suggestion: Check whether the database user permissions meet the migration requirements.
	Failure cause: This item cannot be checked because the source database fails to be connected. Handling suggestion: Check whether the source database is connected.

**Table 2** Checking whether the source database version is supported
Check Item	Whether the source database version is supported
Description	Check whether the source database version is MongoDB 3.2.x, 3.4.x, or 4.0.x.
Failure Cause and Handling Suggestion	Failure cause: The source database version is not supported. Handling suggestion: Check whether the source database version is MongoDB 3.2x, 3.4.x, and 4.0.x.
	Failure cause: This item cannot be checked because the source database fails to be connected. Handling suggestion: Check whether the source database is connected.
	Failure cause: The incremental data is obtained in changeStream mode but the source database version is earlier than 4.0. Handling suggestion: In changeStream mode, ensure that the source database version is 4.0 or later.