delete()

A MilvusClient interface. This method deletes entity(s) based on the primary key ids.

R<DeleteResponse> delete(DeleteIdsParam requestParam);

DeleteIdsParam

Use the DeleteIdsParam.Builder to construct a DeleteIdsParam object.

import io.milvus.param.highlevel.dml.DeleteIdsParam;
DeleteIdsParam.Builder builder = DeleteIdsParam.newBuilder();

Methods of DeleteIdsParam.Builder:

Method	Description	Parameters
withCollectionName(String collectionName)	Sets the target collection name. Collection name cannot be empty or null.	collectionName: The name of the collection to insert data into.
withPartitionName(tring partitionName)	Sets the partition name (Optional).	partitionName: The target partition name.
withPrimaryIds(List<T> primaryIds)	Specifies primaryField ids. PrimaryIds cannot be empty or null. Note only support the value of primary key.	primaryIds: A list of primary field id.
addPrimaryId(T primaryId)	Specifies primaryField id. PrimaryId cannot be empty or null. Note only support the value of primary key.	primaryId: The id of primary field key.
build()	Constructs an DeleteIdsParam object.	N/A

The DeleteIdsParam.Builder.build() can throw the following exceptions:

• ParamException: error if the parameter is invalid.

Returns

This method catches all the exceptions and returns an R<DeleteResponse> object.

• If the API fails on the server side, it returns the error code and message from the server.

• If the API fails by RPC exception, it returns R.Status.Unknown and the error message of the exception.

• If the API succeeds, it returns a valid DeleteResponse held by the R template.

Example

import io.milvus.param.highlevel.*;
import io.milvus.response.MutationResultWrapper;
import io.milvus.grpc.MutationResult;

List<String> ids = Lists.newArrayList("441966745769900131", "441966745769900133");
DeleteIdsParam param = DeleteIdsParam.newBuilder()
        .withCollectionName(COLLECTION_NAME)
        .withPrimaryIds(ids)
        .build();
        
R<DeleteResponse> response = client.delete(param);
if (response.getStatus() != R.Status.Success.getCode()) {
    System.out.println(response.getMessage());
}

for (Object deleteId : response.getData().getDeleteIds()) {
    System.out.println(deleteId);
}