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Full feature and limit list

Full feature list

  • Precheck
    • Database connection
    • Database version
    • Whether the incremental migration is supported by a database
    • The existence of the table structure
    • Whether the table structure of the source database is supported
  • Structure initialization
    • Table Struct
    • Table Constraint
    • Table Index
    • Comment
  • Data initialization
    • Supports all major data types
  • Incremental data migration
    • Supports all major data types
    • Support the resumable upload capability of eventual consistency

Limit list

  • Overall limits
    • If the incremental data migration is used, the source database should enable CDC (Change Data Capture) related configurations (both are checked and blocked in precheck).
    • A table without a primary key is not supported. And a table with a foreign key is not supported (both are checked and blocked in precheck).
    • Except for the incremental data migration module, other modules do not support resumable upload, i.e. if an exception occurs in this module, such as pod failure caused by downtime and network disconnection, a re-migration is required.
    • During the data transmission task, DDL on the migration objects in the source database is not supported.
    • The table name and field name cannot contain Chinese characters and special characters like a single quotation mark (') and a comma (,).
    • During the migration process, the switchover of primary and secondary nodes in the source library is not supported, which may cause the connection string specified in the task configuration to change. This further leads to migration link failure.
  • Precheck module: None
  • Structure initialization module
    • The user-defined type is not supported.
    • The database character set other than UTF-8 is not supported. (If the source library is utf8mb4, characters in the source library that exceed the expression range of UTF-8 can't be correctly parsed during the module migration process.)
  • Data initialization module
    • Character sets of the source and sink databases should be the same.
  • Data incremental migration module
    • Character sets of the source and sink databases should be the same.