Delete()

This operation deletes entities from a collection by primary key values or filter expression.

func (c *Client) Delete(ctx context.Context, option DeleteOption, callOptions ...grpc.CallOption) (DeleteResult, error)

Request Syntax

option := milvusclient.NewDeleteOption(collectionName).
    WithExpr(expr).
    WithInt64IDs(fieldName, ids).
    WithStringIDs(fieldName, ids).
    WithPartition(partitionName)

result, err := client.Delete(ctx, option)

PARAMETERS:

• collectionName (string)

  The name of the target collection.

OPTION METHODS:

• WithExpr(expr string)

  Sets the expr for the operation.

• WithInt64IDs(fieldName string, ids []int64)

  Sets the int64 i ds for the operation.

• WithStringIDs(fieldName string, ids []string)

  Sets the string i ds for the operation.

• WithPartition(partitionName string)

  Sets the partition for the operation.

RETURN TYPE:

DeleteResult, error

RETURNS:

The delete result. Returns an error if the operation fails.

EXCEPTIONS:

• error

  Check err != nil for failure details.

Example

import (
    "context"
    "fmt"

    "github.com/milvus-io/milvus/client/v2/milvusclient"
)

ctx, cancel := context.WithCancel(context.Background())
defer cancel()

cli, err := milvusclient.New(ctx, &milvusclient.ClientConfig{
    Address: milvusAddr,
})
if err != nil {
    // handle error
}

defer cli.Close(ctx)

res, err := cli.Delete(ctx, milvusclient.NewDeleteOption("quick_setup").
    WithInt64IDs("id", []int64{1, 2, 3}))
if err != nil {
    // handle error
}

fmt.Println(res.DeleteCount)