Database Migration Assistant
Generate safe migration scripts, validate schema changes against production, and create rollback plans so every database change ships with confidence.
What You Will Get
After this walkthrough, your OpenClaw agent will help you plan, generate, validate, and execute database migrations safely. Describe the schema change you need, and the agent generates the migration script, a rollback script, and a validation checklist.
Database migrations are one of the riskiest operations in software development. A bad migration can take down production, corrupt data, or create hours of downtime. The agent mitigates these risks by analyzing your proposed changes against the current schema, checking for data loss scenarios, estimating lock duration on large tables, and generating tested rollback procedures.
Whether you use SQL migrations directly, an ORM like Drizzle or Prisma, or a migration tool like Flyway, the agent adapts to your tooling and generates scripts in the correct format.
How to Set It Up
Configure your database migration assistant
Install the Migration Assistant Skill
Navigate to Skills and install the database-migration-assistant skill. This skill provides schema analysis, migration script generation, rollback planning, and validation capabilities for PostgreSQL, MySQL, SQLite, and other databases.
Connect Your Schema Source
Link your repository and point the agent at your schema files or ORM configuration. For Drizzle, point it at your schema directory. For raw SQL migrations, point it at your migrations folder. The agent builds an understanding of your current schema from these files.
Configure Your Migration Format
Set the output format to match your migration tool. The agent generates scripts for Drizzle Kit, Prisma Migrate, raw SQL, Flyway, and Knex. Configure the naming convention for migration files, such as timestamp prefixes or sequential numbering, to match your existing pattern.
Describe Your Schema Change
Tell the agent what you want to change: Add a status column to the orders table with values pending, processing, shipped, and delivered, with a default of pending. The agent generates the migration, including any necessary index creation, constraint definitions, and default value handling.
Review the Generated Migration
The agent presents the migration script along with an analysis: estimated execution time on your table size, whether it requires a table lock, potential impact on running queries, and any data integrity considerations. Review these carefully before applying the migration.
Generate and Test the Rollback
For every migration, the agent generates a corresponding rollback script. It also identifies whether the rollback is safe (reversible without data loss) or destructive (dropping a column loses its data). Test the rollback against a staging environment to ensure it works correctly.
Apply and Validate
Apply the migration to staging first, then production. After each application, the agent can run validation queries to confirm the schema matches expectations: the column exists, constraints are enforced, indexes are created, and default values work correctly. It reports any discrepancies immediately.
Tips and Best Practices
Always Generate Rollbacks
Never apply a migration without a tested rollback plan. Even if you are confident the migration is correct, unexpected issues happen in production. A ready rollback script turns a potential crisis into a quick recovery.
Check Lock Duration for Large Tables
Ask the agent to estimate lock duration based on your table size. For tables with millions of rows, some operations like adding a non-nullable column without a default can lock the table for minutes. The agent suggests alternative approaches that minimize locking.
Use Staging to Validate
Always apply migrations to staging first. The agent can compare the staging schema against the expected result and flag any issues before you touch production.
Batch Related Changes
When making multiple related schema changes, batch them into a single migration. The agent helps you combine related changes and ensures they are applied atomically, preventing partial schema states.
Frequently Asked Questions
Related Pages
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