diff --git a/examples/alter.py b/examples/alter.py
new file mode 100644
index 000000000..012f1553d
--- /dev/null
+++ b/examples/alter.py
@@ -0,0 +1,44 @@
+import numpy as np
+from pymilvus import (
+    MilvusClient,
+    DataType
+)
+
+dim = 8
+collection_name = "hello_milvus"
+milvus_client = MilvusClient("http://localhost:19530")
+
+has_collection = milvus_client.has_collection(collection_name, timeout=5)
+if has_collection:
+    milvus_client.drop_collection(collection_name)
+
+schema = milvus_client.create_schema(enable_dynamic_field=True)
+schema.add_field("id", DataType.INT64, is_primary=True)
+schema.add_field("embeddings", DataType.FLOAT_VECTOR, dim=dim)
+schema.add_field("title", DataType.VARCHAR, max_length=64)
+milvus_client.create_collection(collection_name, schema=schema)
+rng = np.random.default_rng(seed=19530)
+rows = [
+        {"id": 1, "embeddings": rng.random((1, dim))[0], "a": 100, "title": "t1"},
+        {"id": 2, "embeddings": rng.random((1, dim))[0], "b": 200, "title": "t2"},
+        {"id": 3, "embeddings": rng.random((1, dim))[0], "c": 300, "title": "t3"},
+        {"id": 4, "embeddings": rng.random((1, dim))[0], "d": 400, "title": "t4"},
+        {"id": 5, "embeddings": rng.random((1, dim))[0], "e": 500, "title": "t5"},
+        {"id": 6, "embeddings": rng.random((1, dim))[0], "f": 600, "title": "t6"},
+]
+
+insert_result = milvus_client.insert(collection_name, rows)
+index_params = milvus_client.prepare_index_params()
+index_params.add_index(field_name = "embeddings", metric_type="L2")
+milvus_client.create_index(collection_name, index_params)
+milvus_client.alter_index_properties(collection_name,index_name="embeddings", properties={"mmap.enabled":True})
+milvus_client.drop_index_properties(collection_name,index_name="embeddings", property_keys=["mmap.enabled"])
+milvus_client.alter_collection_field(collection_name,field_name="title",field_params={"mmap.enabled":True,"max_length": 2500})
+milvus_client.alter_collection_properties(collection_name, properties={"mmap.enabled":True,"collection.ttl.seconds": 500})
+milvus_client.drop_collection_properties(collection_name,index_name="embeddings", property_keys=["mmap.enabled"])
+milvus_client.load_collection(collection_name)
+print(milvus_client.describe_index(collection_name,index_name="embeddings"))
+print(milvus_client.describe_collection(collection_name))
+milvus_client.release_collection(collection_name)
+milvus_client.drop_index(collection_name, "embeddings")
+milvus_client.drop_collection(collection_name)