milvus的delete操作

milvus版本:v2.3.2

milvus支持delete操作。

使用python sdk代码如下：

from pymilvus import (
    connections,
    Collection,
)

print("start connecting to Milvus")
connections.connect("default", host="192.168.230.71", port="19530")

hello_milvus = Collection("hello_milvus")

print("Start delete entities")
expr = "pk in [446576772095935668,446576772095935667]"
delete_result = hello_milvus.delete(expr)
print(delete_result)

不管pk是否存在都会返回对应的数量：
(insert count: 0, delete count: 2, upsert count: 0, timestamp: 446577115426193409, success count: 0, err count: 0)

这里例子指定了2个id需要删除，如果这2个id不存在，【delete count】也会返回2。