gcloud alpha sql blue-green-deployments create

INFORMATION
gcloud alpha sql blue-green-deployments create is not available in universe domain universe.
NAME
gcloud alpha sql blue-green-deployments create - creates a Cloud SQL blue-green deployment
SYNOPSIS
gcloud alpha sql blue-green-deployments create DEPLOYMENT --source-instance=SOURCE_INSTANCE [--async] [--description=DESCRIPTION] [--region=REGION] [--target-database-version=TARGET_DATABASE_VERSION] [GCLOUD_WIDE_FLAG …]
DESCRIPTION
(ALPHA) Creates a Cloud SQL blue-green deployment.
EXAMPLES
To create a blue-green deployment named my-deployment from source instance my-instance in region us-central1: 
gcloud alpha sql blue-green-deployments create my-deployment --source-instance=my-instance --region=us-central1

To create a blue-green deployment with a target database version for a major version upgrade: 

gcloud alpha sql blue-green-deployments create my-deployment --source-instance=my-instance --target-database-version=POSTGRES_15 --region=us-central1
POSITIONAL ARGUMENTS
DEPLOYMENT
The ID of the blue-green deployment.
REQUIRED FLAGS
--source-instance=SOURCE_INSTANCE
Cloud SQL instance to be used as source for the blue-green deployment.
OPTIONAL FLAGS
--async
Return immediately, without waiting for the operation in progress to complete.
--description=DESCRIPTION
User-provided description for the blue-green deployment.
--region=REGION
Regional location (e.g. asia-east1, us-east1). See the full list of regions at https://cloud.google.com/sql/docs/instance-locations.
--target-database-version=TARGET_DATABASE_VERSION
Database version for the target instance, for major version upgrade.
GCLOUD WIDE FLAGS
These flags are available to all commands: --access-token-file, --account, --billing-project, --configuration, --flags-file, --flatten, --format, --help, --impersonate-service-account, --log-http, --project, --quiet, --trace-token, --user-output-enabled, --verbosity.

Run $ gcloud help for details.

NOTES
This command is currently in alpha and might change without notice. If this command fails with API permission errors despite specifying the correct project, you might be trying to access an API with an invitation-only early access allowlist. This variant is also available: 
gcloud beta sql blue-green-deployments create