mybatis-plus 自带的saveOrUpdateBatch 是以主键来判断插入 或更新的， 如何根据唯一索引实现呢？

## mysql 定义唯一索引 unique key: (salary_date, tenant_id, type, id_no)@Transactional(rollbackFor = Exception.class)
@Override
public boolean saveOrUpdateBatchByUniqueKey(List<Salary> list) {// 这里主要是查询唯一约束对应的记录是否存在return SqlHelper.saveOrUpdateBatch(entityClass, this.mapperClass, super.log, list, DEFAULT_BATCH_SIZE, (sqlSession, entity) -> {LambdaQueryWrapper<Salary> queryWrapper = Wrappers.<Salary>lambdaQuery().eq(Salary::getSalaryDate, entity.getSalaryDate()).eq(Salary::getTenantId, entity.getTenantId()).eq(Salary::getType, entity.getType()).eq(Salary::getIdNo, entity.getIdNo());Map<String, Object> queryParam = CollectionUtils.newHashMapWithExpectedSize(1);queryParam.put(com.baomidou.mybatisplus.core.toolkit.Constants.WRAPPER, queryWrapper);return CollectionUtils.isEmpty(sqlSession.selectList(getSqlStatement(SqlMethod.SELECT_LIST), queryParam));}, (sqlSession, entity) -> {LambdaUpdateWrapper<Salary> updateWrapper = new LambdaUpdateWrapper<>();updateWrapper.eq(Salary::getSalaryDate, entity.getSalaryDate()).eq(Salary::getTenantId, entity.getTenantId()).eq(Salary::getType, entity.getType()).eq(Salary::getIdNo, entity.getIdNo());Map<String, Object> param = CollectionUtils.newHashMapWithExpectedSize(2);param.put(com.baomidou.mybatisplus.core.toolkit.Constants.ENTITY, entity);param.put(com.baomidou.mybatisplus.core.toolkit.Constants.WRAPPER, updateWrapper);sqlSession.update(getSqlStatement(SqlMethod.UPDATE), param);});
}