动态字段使用方式疑惑 #44422
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ITAndyoo
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动态字段使用方式疑惑
#44422
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$meta其实只是一个特殊的JSON类型字段,$meta是它的特殊名字,那些额外的属性都被以json key-value形式填充进这个特殊字段。 |
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你不需要关心milvus存到了哪里。正常只有两种模式,你知道你要哪些列,那就指定。如果不知道就输出* |
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我们在实际使用动态字段时,把一些数据中未预料到的属性放到了$meta 里,但再次检索时,我看文档动态字段如果需要检出,需要在 output_fields 中定义,但此时我可能不知道$meta 里有哪些字段,我该如何检出$meta 中所有数据,为什么 milvus 要这么设计,请解惑,谢谢!
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