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# Angel3 Migration Runner
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This package contains the implementation of the database migration for the following databases. It is designed to work with Angel3 ORM.
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* PostgreSQL 10.x or greater
* MariaDB 10.2.x or greater
* MySQL 8.x or greater
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## Usage
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* Use `PostgresMigrationRunner` to perform database migration for PostgreSQL.
* Use `MySqlMigrationRunner` to perform database migration for MySQL and MariaDB. This runner is using [`mysql_client` ](https://pub.dev/packages?q=mysql_client ) driver.
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* Use `MariaDbMigrationRunner` to perform database migration for MariaDB. This runner is using [`mysql1` ](https://pub.dev/packages?q=mysql1 ) driver.
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## Supported Operations
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* up - Generate all the tables based on the ORM models.
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* reset - Clear out all records in the `migrations` table and drop all the ORM related tables.
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* refresh - Run `reset` follow by `up`
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## Limitation
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* Update schema changes is not supported