Drop an Index

This topic describes how to drop an index in Milvus. Before dropping an index, make sure to release it first.

Drop the only index in a collection:

from pymilvus import Collection
collection = Collection("book")      # Get an existing collection.
collection.drop_index()

await milvusClient.dropIndex({
  collection_name: "book",
});

err = milvusClient.DropIndex(
  context.Background(),     // ctx
  "book",                   // CollectionName
  "book_intro",             // fieldName
)
if err != nil {
  log.Fatal("fail to drop index:", err.Error())
}

milvusClient.dropIndex(
  DropIndexParam.newBuilder()
    .withCollectionName("book")
    .withFieldName("book_intro")
    .build()
);

delete index -c book

curl -X 'DELETE' \
  'http://localhost:9091/api/v1/index' \
  -H 'accept: application/json' \
  -H 'Content-Type: application/json' \
  -d '{
    "collection_name": "book",
    "field_name": "book_intro"
  }'

If a collection contains two or more indexes, specify the name of the index to delete it:

from pymilvus import Collection
collection = Collection("book")
collection.drop_index(index_name='book_intro')

await milvusClient.dropIndex({
  collection_name: "book",
  index_name: "book_intro"
});

milvusClient.dropIndex(
  DropIndexParam.newBuilder()
    .withCollectionName("book")
    .withIndexName("book_intro")
    .build()
);

What's next

• Learn more basic operations of Milvus:
  • Conduct a vector search
  • Conduct a hybrid search