Those MySQL pitfalls in Mycat

Mycat is an open source MySQL database middleware, which provides functions such as database sharding, table sharding, and read-write separation. However, there are some pitfalls and challenges you may encounter when using Mycat. This article will introduce some common Mycat pitfalls and provide corresponding source code examples.

1. Data consistency issue:
   When using Mycat for database and table sharding, data consistency is a key issue. When performing write operations on multiple database nodes, data synchronization delays or data inconsistencies may occur. In order to avoid this problem, you can use the XA transaction provided by Mycat or ensure data consistency through the application itself.

   Sample code:

   // 使用XA事务
   Connection conn = dataSource.getConnection();
   conn.setAutoCommit(false);