What all the steps Liquibase follows while rolling back?

Question

I don\'t understand the detailed steps when rolling back using Liquibase.

I had scenario like 6 changesets and for one changeSet rollback was not defined - that is, on

Answer 1

Depending on your change sets, may be you fall in case of statements having rollback commands generated automatically, as for Liquibase Rollback documentation:

Many refactorings such as “create table”, “rename column”, and “add column” can automatically create rollback statements. If your change log contains only statements that fit into this category, your rollback commands will be generated automatically.

Other refactorings such as “drop table” and “insert data” have no corresponding rollback commands that can be automatically generated. In these cases, and cases where you want to override the default generated rollback commands, you can specify the rollback commands via the tag within the changeSet tag. If you do not want anything done to undo a change in rollback mode, use an empty tag.

At http://forum.liquibase.org/topic/understanding-rollback you can find more details and other links.