This Gemini CLI extension provides a set of tools to interact with Cloud SQL for MySQL instances. It allows you to manage your databases, execute queries, explore schemas, and troubleshoot issues directly from the Gemini CLI, using natural language prompts.

Learn more about Gemini CLI Extensions.

• Seamless Workflow: As a Google-developed extension, it integrates seamlessly into the Gemini CLI environment. No need to constantly switch contexts for common database tasks.
• Natural Language Queries: Stop wrestling with complex commands. Explore schemas and query data by describing what you want in plain English.
• Full Lifecycle Control: Manage the entire lifecycle of your database, from creating instances to exploring schemas and running queries.
• Code Generation: Accelerate development by asking Gemini to generate data classes and other code snippets based on your table schemas.

Before you begin, ensure you have the following:

• Gemini CLI installed with version +v0.6.0.
• Setup Gemini CLI Authentication.
• A Google Cloud project with the Cloud SQL Admin API enabled.
• Ensure Application Default Credentials are available in your environment.
• IAM Permissions:
  • Cloud SQL Client (roles/cloudsql.client)
  • Cloud SQL Viewer (roles/cloudsql.viewer)
  • Cloud SQL Admin (roles/cloudsql.admin)

To install the extension, use the command:

gemini extensions install https://github.com/gemini-cli-extensions/cloud-sql-mysql

Set the following environment variables before starting the Gemini CLI. These variables can be loaded from a .env file. This configuration is not required if utilizing the Admin toolset.

export CLOUD_SQL_MYSQL_PROJECT="<your-gcp-project-id>"
export CLOUD_SQL_MYSQL_REGION="<your-cloud-sql-region>"
export CLOUD_SQL_MYSQL_INSTANCE="<your-cloud-sql-instance-id>"
export CLOUD_SQL_MYSQL_DATABASE="<your-database-name>"
export CLOUD_SQL_MYSQL_USER="<your-database-user>"
export CLOUD_SQL_MYSQL_PASSWORD="<your-database-password>"
export CLOUD_SQL_MYSQL_IP_TYPE="PUBLIC" # Optional: `PUBLIC`, `PRIVATE`, `PSC`. Defaults to `PUBLIC`.

Ensure Application Default Credentials are available in your environment.

To start the Gemini CLI, use the following command:

gemini

Interact with MySQL using natural language:

• Provision Infrastructure:
  • "Create a new Cloud SQL for MySQL instance named 'e-commerce-prod' in the 'my-gcp-project' project."
  • "Create a new user named 'analyst' with read access to all tables."
• Explore Schemas and Data:
  • "Show me all tables in the 'orders' database."
  • "What are the columns in the 'products' table?"
  • "How many orders were placed in the last 30 days, and what were the top 5 most purchased items?"
• Generate Code:
  • "Generate a Python dataclass to represent the 'customers' table."

• Admin:

  • create_instance: Use this tool to create an Postgres instance.
  • create_user: Use this tool to create Postgres-BUILT-IN or IAM-based users.
  • get_instance: Use this tool to get details about an Postgres instance.
  • get_user: Use this tool to get details about a user.
  • list_instances: Use this tool to list instances in a given project and location.
  • list_users: Use this tool to list users in a given project and location.
  • wait_for_operation: Use this tool to poll the operations API until the operation is done.

• Data:

  • list_tables: Use this tool to list tables and descriptions.
  • execute_sql: Use this tool to execute any SQL statement.
  • get_query_plan: Use this tool to generate an execution plan.
  • list_active_queries: Use this tool to lists top N (default 10) ongoing queries.
  • list_tables_missing_unique_indexes: Use this tool to find tables that do not have primary or unique key constraint
  • list_table_fragmentation: Use this tool to list fragmented tables

Find additional extensions to support your entire software development lifecycle at github.com/gemini-cli-extensions, including:

• Generic MySQL extension
• Cloud SQL for MySQL Observability extension
• and more!

Use gemini --debug to enable debugging.

Common issues:

• "failed to find default credentials: google: could not find default credentials.": Ensure Application Default Credentials are available in your environment. See Set up Application Default Credentials for more information.
• "✖ Error during discovery for server: MCP error -32000: Connection closed": The database connection has not been established. Ensure your configuration is set via environment variables.
• "✖ MCP ERROR: Error: spawn /Users/USER/.gemini/extensions/cloud-sql-mysql/toolbox ENOENT": The Toolbox binary did not download correctly. Ensure you are using Gemini CLI v0.6.0+.
• "cannot execute binary file": The Toolbox binary did not download correctly. Ensure the correct binary for your OS/Architecture has been downloaded. See Installing the server for more information.