How to Efficiently Batch Insert and Update in MyBatis with Oracle Handling Both New and Existing Records?

MyBatis Batch Merge for Oracle

Q: How to perform batch updates and inserts in MyBatis while handling both new and existing records in an Oracle database?

A: MyBatis does not natively support batch merging. However, using the batch executor mode and repeated updates or inserts for individual records is an effective approach.

Here's a sample code:

public void batchUpdateRecords(List<Object> objects) {
    SqlSession sqlSession = MyBatisUtils.getSqlSessionFactory().openSession(ExecutorType.BATCH);
    try {
        GisObjectMapper mapper = sqlSession.getMapper(GisObjectMapper.class);
        for (Object object : objects) {
            mapper.updateRecord(object);
        }
        sqlSession.commit();
    } finally {
        sqlSession.close();
    }
}

In this example:

• The ExecutorType.BATCH mode is used to open the session in batch mode.
• For each object in the list, the updateRecord method is called, which should contain the update/insert logic.
• Ensure that the updateRecord method updates or inserts only a single record to avoid Oracle errors.
• Finally, the commit method is called to execute the batch operation.

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