[Bug]: [Nightly] Search on not loaded fields will not report error

[NicoYuan1986]

Is there an existing issue for this?

• I have searched the existing issues

Environment

- Milvus version: 34c7b08
- Deployment mode(standalone or cluster):standalone
- MQ type(rocksmq, pulsar or kafka):    rocksmq
- SDK version(e.g. pymilvus v2.0.0rc2):
- OS(Ubuntu or CentOS): 
- CPU/Memory: 
- GPU: 
- Others:

Current Behavior

Search on not loaded fields will not report error.

2025-01-16T21:50:34Z {container="step-test"} @pytest.mark.tags(CaseLabel.L1)
2025-01-16T21:50:34Z {container="step-test"} def test_search_on_not_loaded_fields(self):
2025-01-16T21:50:34Z {container="step-test"} """
2025-01-16T21:50:34Z {container="step-test"} target: test search on skipped fields
2025-01-16T21:50:34Z {container="step-test"} method:
2025-01-16T21:50:34Z {container="step-test"} 1. create a collection with fields
2025-01-16T21:50:34Z {container="step-test"} 2. load a part of the fields
2025-01-16T21:50:34Z {container="step-test"} 3. search on skipped fields in expr and/or output_fields
2025-01-16T21:50:34Z {container="step-test"} expected:
2025-01-16T21:50:34Z {container="step-test"} 1.  raise exception
2025-01-16T21:50:34Z {container="step-test"} """
2025-01-16T21:50:34Z {container="step-test"} self._connect()
2025-01-16T21:50:34Z {container="step-test"} name = cf.gen_unique_str()
2025-01-16T21:50:34Z {container="step-test"} dim = 32
2025-01-16T21:50:34Z {container="step-test"} nb = 2000
2025-01-16T21:50:34Z {container="step-test"} pk_field = cf.gen_int64_field(name='pk', is_primary=True)
2025-01-16T21:50:34Z {container="step-test"} not_load_int64_field = cf.gen_int64_field(name="not_int64_load")
2025-01-16T21:50:34Z {container="step-test"} load_string_field = cf.gen_string_field(name="string_load")
2025-01-16T21:50:34Z {container="step-test"} vector_field = cf.gen_float_vec_field(dim=dim)
2025-01-16T21:50:34Z {container="step-test"} schema = cf.gen_collection_schema(fields=[pk_field, not_load_int64_field, load_string_field, vector_field],
2025-01-16T21:50:34Z {container="step-test"} auto_id=True, enable_dynamic_field=True)
2025-01-16T21:50:34Z {container="step-test"} collection_w = self.init_collection_wrap(name=name, schema=schema)
2025-01-16T21:50:34Z {container="step-test"} int_values = [i for i in range(nb)]
2025-01-16T21:50:34Z {container="step-test"} string_values = [str(i) for i in range(nb)]
2025-01-16T21:50:34Z {container="step-test"} float_vec_values = cf.gen_vectors(nb, dim)
2025-01-16T21:50:34Z {container="step-test"} collection_w.insert([int_values, string_values, float_vec_values])
2025-01-16T21:50:34Z {container="step-test"} 
2025-01-16T21:50:34Z {container="step-test"} # build index
2025-01-16T21:50:34Z {container="step-test"} collection_w.create_index(field_name=vector_field.name, index_params=ct.default_index)
2025-01-16T21:50:34Z {container="step-test"} collection_w.load(load_fields=[pk_field.name, vector_field.name, load_string_field.name])
2025-01-16T21:50:34Z {container="step-test"} # search
2025-01-16T21:50:34Z {container="step-test"} search_params = ct.default_search_params
2025-01-16T21:50:34Z {container="step-test"} nq = 1
2025-01-16T21:50:34Z {container="step-test"} search_vectors = float_vec_values[0:nq]
2025-01-16T21:50:34Z {container="step-test"} error = {ct.err_code: 999, ct.err_msg: f"field {not_load_int64_field.name} is not loaded"}
2025-01-16T21:50:34Z {container="step-test"} >       collection_w.search(data=search_vectors, anns_field=vector_field.name, param=search_params,
2025-01-16T21:50:34Z {container="step-test"} limit=10, output_fields=[not_load_int64_field.name, load_string_field.name],
2025-01-16T21:50:34Z {container="step-test"} check_task=CheckTasks.err_res, check_items=error)

2025-01-16T21:50:34Z {container="step-test"} [2025-01-16 20:17:07 - DEBUG - ci_test]: (api_request)  : [Collection.load] args: [None, 1, 180], kwargs: {'load_fields': ['pk', 'float_vector', 'string_load']} (api_request.py:52)
2025-01-16T21:50:34Z {container="step-test"} [2025-01-16 20:17:08 - DEBUG - ci_test]: (api_response) : None  (api_request.py:27)
2025-01-16T21:50:34Z {container="step-test"} [2025-01-16 20:17:08 - DEBUG - ci_test]: (api_request)  : [Collection.search] args: [[[0.18338050756303048, 0.04576889245916608, 0.19126487712031107, 0.19333133709328673, 0.10945140323785169, 0.1580280868912703, 0.05605535716098099, 0.00410007910733039, 0.019330796977636632, 0.006954154238841966, 0.16972730739187775, 0.2110913988521699, 0.021940374435387124, 0.06216311600338715, 0......., kwargs: {} (api_request.py:52)
2025-01-16T21:50:34Z {container="step-test"} [2025-01-16 20:17:08 - DEBUG - ci_test]: (api_response) : data: ['["id: 455359241188068010, distance: 1.0, entity: {\'not_int64_load\': 0, \'string_load\': \'0\'}", "id: 455359241188069993, distance: 0.8925653100013733, entity: {\'not_int64_load\': 1983, \'string_load\': \'1983\'}", "id: 455359241188068474, distance: 0.87794029712677, entity: {\'not_int64_......  (api_request.py:27)

Expected Behavior

report error

Steps To Reproduce

Milvus Log

1. link: https://jenkins.milvus.io:18080/blue/organizations/jenkins/Milvus%20Nightly%20CI(new)/detail/2.4/146/pipeline/133/
2. 2025-01-16T20:17:09Z {container="step-test"} [gw4] [ 26%] FAILED testcases/test_field_partial_load.py::TestFieldPartialLoadInvalid::test_search_on_not_loaded_fields

Anything else?

No response