imbajin 9d8ceb4dfc Optimize update logic & add a new strategy (#673) ... 1. if original data is not null but new data is null, use original data instead of null 2. add update strategy "OVERRIDE"		2019-09-24 20:26:07 +08:00
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hugegraph/example	Optimize update logic & add a new strategy (#673)	2019-09-24 20:26:07 +08:00