[Bug]: Incorrect search result of pymilvus example

[yhmo]

Is there an existing issue for this?

• [X] I have searched the existing issues

Environment

- Milvus version:
- Deployment mode(standalone or cluster):
- SDK version(e.g. pymilvus v2.0.0rc2):
- OS(Ubuntu or CentOS): 
- CPU/Memory: 
- GPU: 
- Others:

Current Behavior

Start a milvus server(2.2) Run this pymilvus example: https://github.com/milvus-io/pymilvus/blob/master/examples/example.py

The example insert 10000 vectors into milvus, and then use the No.1 No.2 and No.3 vectors to search.

But the result is incorrect, in the result for No.1 vector, the Top0 should be the No.1 vector, but it isn't.

Expected Behavior

No response

Steps To Reproduce

No response

Milvus Log

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Anything else?

No response

[yhmo]

Same problem: https://github.com/milvus-io/milvus/discussions/20680

[yanliang567]

/assign @jiaoew1991 /unassign

[jiaoew1991]

/assign @XuanYang-cn /unassign

[XuanYang-cn]

  115     search_param = {                                                                                                                        
  116         "data": search_vectors,                                                                                                             
  117         "anns_field": vector_field,                                                                                                         
  118         "param": {"metric_type": _METRIC_TYPE, "params": {"nprobe": _NPROBE}},                                                              
  119         "limit": _TOPK,                                                                                                                     
  120         "expr": "id_field > 0"}    

The first vector's id==0, and the expr requires "id_field>0", so the first result won't be the NO.1 vector.

change id_field>0 to id_field>=0 will get the following:

Search result for 0th vector: 
Top 0: (distance: 0.0, id: 0)
Top 1: (distance: 15.004575729370117, id: 5568)
Top 2: (distance: 15.679189682006836, id: 8573)

Search result for 1th vector: 
Top 0: (distance: 0.0, id: 1)
Top 1: (distance: 14.305086135864258, id: 4011)
Top 2: (distance: 14.806175231933594, id: 3669)

Search result for 2th vector: 
Top 0: (distance: 0.0, id: 2)
Top 1: (distance: 14.328184127807617, id: 5903)
Top 2: (distance: 14.504249572753906, id: 471)

[XuanYang-cn]

/unassign /assign @yhmo