Fix MyBatis Pagination Issues

MyBatis is a persistence framework commonly used for accessing databases. When performing pagination queries with MyBatis, pagination functionality can be achieved by either configuring a pagination plugin or manually setting pagination parameters.

If the pagination function of MyBatis is not working, it may be due to the following reasons:

1. Pagination plugin not configured: If the pagination plugin is not configured in the MyBatis configuration file, the pagination feature will not work. You can enable pagination functionality by introducing a third-party pagination plugin, such as PageHelper, or by writing a custom pagination plugin.
2. SQL statement error: It may be due to incorrect SQL statement writing, causing issues with correctly paginating the data. You can check the SQL statements executed by MyBatis in the logs and verify if the pagination parameters are correctly set.
3. Pagination parameter setting error: It could be that the pagination parameters passed in the Mapper interface are incorrect, resulting in the pagination function not working. Check if the pagination parameters are correctly set in the Mapper interface, such as the PageHelper.startPage method.
4. The database does not support paginated queries: If the database being used does not support paginated queries, such as MySQL needing to use the LIMIT keyword for paginated queries, and Oracle needing to use ROWNUM for paginated queries. It is necessary to correctly write paginated query statements based on the different database types.

Solution:

1. Ensure the correct configuration of pagination plugins or custom pagination plugins.
2. Check if the SQL statement is correct, including setting the proper pagination parameters.
3. Ensure that the pagination parameters are correctly set in the Mapper interface.
4. Write pagination queries correctly according to different types of databases.

By identifying the possible reasons mentioned above that may cause pagination not to work, the issue of MyBatis pagination functionality not working can be resolved.