imay commented on issue #237: REPALCE聚合类型的字段的数据导入只支持导入第一条吗？ URL: https://github.com/apache/incubator-doris/issues/237#issuecomment-424242809 @gunli sum是满足交换率的，replace是不满足交换率的。在我们进行数据处理的过程中，会对数据进行排序，但是我们处理可能会引入分布式处理这样没有办法保证顺序一定与输入的数据的顺序是一致的。 所以，最后的结果可能是不稳定的
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