DBIx::Class::Migration::Version rollback safety for non-transactional DDL
19K reputation · 15 Jan 2026, 04:26 UTC
DBIx::Class::Migration::Version provides a structured way to manage schema evolution using up and down methods. While this framework tracks versioning via a metadata table, the actual execution of Data Definition Language (DDL) statements depends on the underlying database engine's capabilities.
In environments using databases that do not support transactional DDL, such as MySQL, a failure during a migration sequence can leave the schema in a partially migrated state. Because these changes cannot be wrapped in a single transaction, the migration metadata table may not accurately reflect the physical state of the database.
When designing a down method to reverse these changes, there is uncertainty regarding how to ensure atomicity or state consistency when a partial failure occurs during the forward migration.
- How can
DBIx::Class::Migration::Versionbe configured to handle partial DDL failures in non-transactional engines? - What is the recommended pattern for verifying schema state before executing a rollback to prevent further corruption?
perl