DropCollectionField()

This operation removes a field from an existing collection by field name or field ID.

Go

func (c *Client) DropCollectionField(ctx context.Context, opt DropCollectionFieldOption, callOpts ...grpc.CallOption) error

Request Syntax

Go

option := milvusclient.NewDropCollectionFieldOption(collectionName, fieldName)

err := client.DropCollectionField(ctx, option)

PARAMETERS:

• option (DropCollectionFieldOption)

  The options for dropping the collection field. Use NewDropCollectionFieldOption or NewDropCollectionFieldByIDOption to construct.

BUILDER METHODS:

• NewDropCollectionFieldOption(collectionName string, fieldName string)

  Creates options to drop a field by its name.

• NewDropCollectionFieldByIDOption(collectionName string, fieldID int64)

  Creates options to drop a field by its field ID. The field ID must be greater than 0.

RETURN TYPE:

error

RETURNS:

Returns nil after the field is dropped. Returns an error when client-side validation or the RPC fails.

ERROR HANDLING:

• error

  Validation, request construction, or the RPC fails. Check err != nil for failure details.

Example

Go

import (
	"context"

	"github.com/milvus-io/milvus/client/v3/milvusclient"
)

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

cli, err := milvusclient.New(ctx, &milvusclient.ClientConfig{Address: "127.0.0.1:19530"})
if err != nil {
	// handle error
}
defer cli.Close(ctx)

err = cli.DropCollectionField(ctx, milvusclient.NewDropCollectionFieldOption("books", "old_field"))
if err != nil {
	// handle error
}