Delete models

This page shows you how to delete BigQuery ML models. You can delete a model by:

Using the Google Cloud console
Using the bq command-line tool's bq rm command or bq query command
Calling the models.delete API method or calling the jobs.query method
Using the client libraries

You can only delete one model at a time. When you delete a model, any data in the model is also deleted.

To automatically delete models after a specified period of time, set the model's expiration time when you create it using the bq command-line tool, the API, or the client libraries. If you did not set the expiration when the model was created, you can update the model's expiration time.

Limitations on deleting models

Deleting a model is subject to the following limitations:

You can't delete multiple models at the same time. You must delete them individually.
You can't restore a deleted model.

Required permissions

To delete models in a dataset, you must be assigned the WRITER role on the dataset, or you must be assigned a project-level Identity and Access Management (IAM) role that includes bigquery.models.delete permissions. If you are granted bigquery.models.delete permissions at the project level, you can delete models in any dataset in the project. The following project-level IAM roles include bigquery.models.delete permissions:

bigquery.dataEditor
bigquery.dataOwner
bigquery.admin

For more information about IAM roles and permissions in BigQuery ML, see Access control.

Delete a model

To delete a model, do the following:

Console

You can delete a model in the Google Cloud console by using the Delete Model option or by running a query that contains a DROP MODEL | DROP MODEL IF EXISTS DDL statement.

Option one: Use the Delete Model option.

In the left pane, click Explorer:

If you don't see the left pane, click Expand left pane to open the pane.
In the Explorer pane, expand your project, click Datasets, and then click your dataset.
Click the Models tab, and then click a model name to select the model.
Click the options icon for the model and then click Delete.
In the Delete model dialog, type delete and then click Delete.

Option two: Use a DDL statement.

In the Google Cloud console, go to the BigQuery page.

Go to the BigQuery page
Click Compose new query.
Type your DDL statement in the Query editor text area.
```
 DROP MODEL mydataset.mymodel
```
Click Run. When the query completes, the model is removed from the navigation pane.

bq

You can delete a model using the bq command-line tool by entering the:

bq rm command with the --model or -m flag
bq query command with the DDL statement as the query parameter

If you are deleting a model in a project other than your default project, add the project ID to the dataset in the following format: [PROJECT_ID]:[DATASET].[MODEL].

Option one: Enter the bq rm command

When you use the bq rm command to remove a model, you must confirm the action. You can use the --force flag (or -f shortcut) to skip confirmation.

bq rm -f --model PROJECT_ID:DATASET.MODEL

Replace the following:

PROJECT_ID is your project ID.
DATASET is the name of the dataset.
MODEL is the name of the model.

The rm command produces no output.

Examples:

Enter the following command to delete mymodel from mydataset. mydataset is in your default project.

bq rm --model mydataset.mymodel

Enter the following command to delete mymodel from mydataset. mydataset is in myotherproject, not your default project.

bq rm --model myotherproject:mydataset.mymodel

Enter the following command to delete mymodel from mydataset. mydataset is in your default project. The command uses the -f shortcut to bypass confirmation.

bq rm -f --model mydataset.mymodel

You can confirm that the model was deleted by issuing the bq ls command. For more information, see List models.

Option two: Enter the bq query command

To delete a model by using the bq query command, supply the DROP MODEL statement in the query parameter and supply the --use_legacy_sql=false flag to specify GoogleSQL query syntax.

Examples:

Enter the following command to delete mymodel from mydataset. mydataset is in your default project.

bq query --use_legacy_sql=false 'DROP MODEL mydataset.mymodel'

Enter the following command to delete mymodel from mydataset. mydataset is in myotherproject, not your default project.

bq query --use_legacy_sql=false \
'DROP MODEL myotherproject:mydataset.mymodel'

API

Option one: Call the models.delete method

To delete a model, call the models.delete method and provide the projectId, datasetId, and modelId.

Option two: Call the jobs.query method

To delete a model, call the jobs.query method and supply the DROP MODEL DDL statement in the request body's query property.

Go

Before trying this sample, follow the Go setup instructions in the BigQuery quickstart using client libraries. For more information, see the BigQuery Go API reference documentation.

To authenticate to BigQuery, set up Application Default Credentials. For more information, see Set up authentication for client libraries.

import (
	"context"
	"fmt"

	"cloud.google.com/go/bigquery"
)

// deleteModel demonstrates deletion of BigQuery ML model.
func deleteModel(projectID, datasetID, modelID string) error {
	// projectID := "my-project-id"
	// datasetID := "mydataset"
	// modelID := "mymodel"
	ctx := context.Background()
	client, err := bigquery.NewClient(ctx, projectID)
	if err != nil {
		return fmt.Errorf("bigquery.NewClient: %w", err)
	}
	defer client.Close()

	model := client.Dataset(datasetID).Model(modelID)
	if err := model.Delete(ctx); err != nil {
		return fmt.Errorf("couldn't delete model: %w", err)
	}
	return nil
}

Java

Before trying this sample, follow the Java setup instructions in the BigQuery quickstart using client libraries. For more information, see the BigQuery Java API reference documentation.

To authenticate to BigQuery, set up Application Default Credentials. For more information, see Set up authentication for client libraries.

import com.google.cloud.bigquery.BigQuery;
import com.google.cloud.bigquery.BigQueryException;
import com.google.cloud.bigquery.BigQueryOptions;
import com.google.cloud.bigquery.ModelId;

// Sample to delete a model
public class DeleteModel {

  public static void main(String[] args) {
    // TODO(developer): Replace these variables before running the sample.
    String datasetName = "MY_DATASET_NAME";
    String modelName = "MY_MODEL_NAME";
    deleteModel(datasetName, modelName);
  }

  public static void deleteModel(String datasetName, String modelName) {
    try {
      // Initialize client that will be used to send requests. This client only needs to be created
      // once, and can be reused for multiple requests.
      BigQuery bigquery = BigQueryOptions.getDefaultInstance().getService();
      boolean success = bigquery.delete(ModelId.of(datasetName, modelName));
      if (success) {
        System.out.println("Model deleted successfully");
      } else {
        System.out.println("Model was not found");
      }
    } catch (BigQueryException e) {
      System.out.println("Model was not deleted. \n" + e.toString());
    }
  }
}

Node.js

Before trying this sample, follow the Node.js setup instructions in the BigQuery quickstart using client libraries. For more information, see the BigQuery Node.js API reference documentation.

To authenticate to BigQuery, set up Application Default Credentials. For more information, see Set up authentication for client libraries.

// Import the Google Cloud client library
const {BigQuery} = require('@google-cloud/bigquery');
const bigquery = new BigQuery();

async function deleteModel() {
  // Deletes a model named "my_model" from "my_dataset".

  /**
   * TODO(developer): Uncomment the following lines before running the sample
   */
  // const datasetId = "my_dataset";
  // const modelId = "my_model";

  const dataset = bigquery.dataset(datasetId);
  const model = dataset.model(modelId);
  await model.delete();

  console.log(`Model ${modelId} deleted.`);
}

Python

Before trying this sample, follow the Python setup instructions in the BigQuery quickstart using client libraries. For more information, see the BigQuery Python API reference documentation.

To authenticate to BigQuery, set up Application Default Credentials. For more information, see Set up authentication for client libraries.


from google.cloud import bigquery

# Construct a BigQuery client object.
client = bigquery.Client()

# TODO(developer): Set model_id to the ID of the model to fetch.
# model_id = 'your-project.your_dataset.your_model'

client.delete_model(model_id)  # Make an API request.

print("Deleted model '{}'.".format(model_id))

Restore a deleted model

You can't restore a deleted model.

What's next

For an overview of BigQuery ML, see Introduction to BigQuery ML.
To get started using BigQuery ML, see Create machine learning models in BigQuery ML.
To learn more about working with models, see: