# ANN Search Operator: Milvus

*author: junjie.jiangjjj*

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## Desription
Search embedding in [Milvus](https://milvus.io/), **please make sure you have inserted data to Milvus Collection**.

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## Code Example

> Please make sure you have inserted data into Milvus, refer to [ann_insert.milvus_client](https://towhee.io/ann-insert/milvus-client) and [load the collection](https://milvus.io/docs/v2.1.x/load_collection.md) to memory.


```python
from towhee.dc2 import pipe, ops

p = pipe.input('vec') \
    .map('vec', ('id', 'score'), ops.ann_insert.milvus_client(host='127.0.0.1', port='19530', collection_name='textdb')) \
    .output('id', 'score')

# call pipeline
p(vec_data)
```

```python
from towhee.dc2 import pipe, ops

# search additional info url:

p = pipe.input('vec') \
    .map('vec', ('id', 'score', 'url'), ops.ann_insert.milvus_client(host='127.0.0.1', port='19530', collection_name='textdb', output_fields=['url'])) \
    .output('id', 'score', 'url')
```

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## Factory Constructor

Create the operator via the following factory method:

***ann_search.milvus_client(host='127.0.0.1', port='19530', collection_name='textdb')***


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