# Unsupported database features (Prisma Migrate)

Prisma Migrate uses the Prisma schema to determine what features to create in the database. However, some database features [cannot be represented in the Prisma schema](/guides/prisma-schema-v6-data-model-unsupported-database-features) , including but not limited to:

- Stored procedures
- Triggers
- Views
- Partial indexes

To add an unsupported feature to your database, you must [customize a migration](/guides/prisma-migrate-v6-workflows-customizing-migrations) to include that feature before you apply it.

:::callout{intent="note"}
The Prisma schema is able to represent [unsupported field types](/guides/prisma-schema-v6-data-model-unsupported-database-features#unsupported-field-types) and [native database functions](/guides/prisma-migrate-v6-workflows-native-database-functions).
:::

:::callout{intent="warning"}
This guide **does not apply for MongoDB**.\
Instead of `migrate dev`, [`db push`](/guides/prisma-migrate-v6-workflows-prototyping-your-schema) is used for [MongoDB](/guides/core-concepts-v6-overview-databases-mongodb).
:::

## [Customize a migration to include an unsupported feature](#customize-a-migration-to-include-an-unsupported-feature)

To customize a migration to include an unsupported feature:

1. Use the `--create-only` flag to generate a new migration without applying it:

   ::::tabs
   :::tab{title="bun"}
   ```
   bunx prisma migrate dev --create-only
   ```
   :::

   :::tab{title="pnpm"}
   ```bash
   pnpm prisma migrate dev --create-only
   ```
   :::

   :::tab{title="yarn"}
   ```bash
   yarn prisma migrate dev --create-only
   ```
   :::

   :::tab{title="npm"}
   ```bash
   npx prisma migrate dev --create-only
   ```

   2. Open the generated `migration.sql` file and add the unsupported feature - for example, a partial index:

      ```sql
      CREATE UNIQUE INDEX tests_success_constraint
        ON posts (subject, target)
        WHERE success;
      ```

   3. Apply the migration:
   :::
   ::::

2. Open the generated `migration.sql` file and add the unsupported feature - for example, a partial index:

   ```
   CREATE UNIQUE INDEX tests_success_constraint

     ON posts (subject, target)

     WHERE success;
   ```

3. Apply the migration:

   ::::tabs
   :::tab{title="bun"}
   ```
   bunx prisma migrate dev
   ```
   :::

   :::tab{title="pnpm"}
   ```bash
   pnpm prisma migrate dev
   ```
   :::

   :::tab{title="yarn"}
   ```bash
   yarn prisma migrate dev
   ```
   :::

   :::tab{title="npm"}
   ```bash
   npx prisma migrate dev
   ```

   4. Commit the modified migration to source control.
   :::
   ::::

4. Commit the modified migration to source control.

## Related pages

- [Authentication & Tools](./authentication-tools-index.md)
- [Build](./build-index.md)
- [Changelog](../changelog.md)
- [Concepts](./concepts-index.md)
- [Console commands](./console-commands-index.md)
- [Contract Authoring](./contract-authoring-index.md)
- [Core Concepts](./core-concepts-index.md)
- [Data Modeling](./data-modeling-index.md)
- [Database](./database-index.md)
- [DB commands](./db-commands-index.md)

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