[Bug]: create index on json field is not supported: expected=supported field, actual=create index on 104 field: invalid parameter

[Joyce920hope]

Is there an existing issue for this?

• I have searched the existing issues

Environment

- Milvus version: 2.2.8 
- SDK version(e.g. pymilvus v2.0.0rc2): pymilvus version: 2.5.0

Current Behavior

I'm following this example https://github.com/milvus-io/pymilvus/blob/master/examples/sparse.py to store sparse embedding in Milvus server.

I got this error when I created an index on collection:
client.create_collection('my_sparse_collection', schema=schema,
index_params=index_params, timeout=5, consistency_level="Strong")

error:
RPC error: [create_index], <MilvusException: (code=1100, message=create index on json field is not supported: expected=supported field, actual=create index on 104 field: invalid parameter)>, <Time:{'RPC start': '2024-12-04 11:47:50.713235', 'RPC error': '2024-12-04 11:47:50.793430'}>
Failed to create an index on collection: my_sparse_collection

Expected Behavior

The index can be created on sparse vector field.

Steps To Reproduce

uri = f"http://{MILVUS_HOST}:{MILVUS_PORT}"
    
client = MilvusClient(
    uri=uri,
    user = MILVUS_USER,
    password = MILVUS_PASSWORD,
    db_name = "default",
)


fields = [
    FieldSchema(name="pk", dtype=DataType.VARCHAR,
                is_primary=True, auto_id=True, max_length=100),
    FieldSchema(name="random", dtype=DataType.DOUBLE),
    FieldSchema(name="sparse_vector", dtype=DataType.SPARSE_FLOAT_VECTOR),
]
schema = CollectionSchema(
    fields, "demo for using sparse float vector with milvus client")

index_params = client.prepare_index_params()
index_params.add_index(field_name="sparse_vector", index_name="sparse_inverted_index",
                       index_type="SPARSE_INVERTED_INDEX", metric_type="IP", params={"drop_ratio_build": 0.2})
client.create_collection('my_sparse_collection', schema=schema,
                                index_params=index_params, timeout=5, consistency_level="Strong")

Milvus Log

RPC error: [create_index], <MilvusException: (code=1100, message=create index on json field is not supported: expected=supported field, actual=create index on 104 field: invalid parameter)>, <Time:{'RPC start': '2024-12-04 11:47:50.713235', 'RPC error': '2024-12-04 11:47:50.793430'}>
Failed to create an index on collection: my_sparse_collection11111

MilvusException Traceback (most recent call last)
[... skipping hidden 1 frame]

Cell In[19], line 4
2 index_params.add_index(field_name="sparse_vector", index_name="sparse_inverted_index",
3 index_type="SPARSE_INVERTED_INDEX", metric_type="IP", params={"drop_ratio_build": 0.2})
----> 4 client.create_collection('my_sparse_collection11111', schema=schema,
5 index_params=index_params, timeout=5, consistency_level="Strong")

Anything else?

No response

[yanliang567]

@Joyce920hope as the error msg said, JSON was supported since v2.2.9 and Sparse vector was supported since 2.4.x. So please use the latest milvus release v2.4.17 or v2.5.0-beta

/assign @Joyce920hope
/unassign

[xiaofan-luan]

@yanliang567
I think user is asking for json index supprot.
@sunby is working on that and hopefully this can be part of 2.5.1

[Joyce920hope]

@Joyce920hope as the error msg said, JSON was supported since v2.2.9 and Sparse vector was supported since 2.4.x. So please use the latest milvus release v2.4.17 or v2.5.0-beta

/assign @Joyce920hope /unassign

@yanliang567 Thank you for clarifying!

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