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asmhatreandClaude Sonnet 5 3908331431 Add db-migrations-flyway-liquibase: Flyway vs Liquibase migrations, rollbacks and baselines on Spring Boot 4.1
Companion code for the Flyway vs Liquibase article: checksum validation, out-of-order
and repeatable migrations, baselining an existing schema, Flyway Community's undo/diff/deploy
stubs, concurrent-startup locking for both tools, Liquibase changeset identity and rollback
(auto-generated vs explicit), a verified Liquibase 5.0.3 filename-caching defect, the new
OSS license service, the FSL license change, and running both tools against one database.

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Q6XdRjtsp4862EM44T7i9a
2026-09-15 07:08:57 +00:00

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Flyway: a lower-versioned migration lands after a higher one is already applied
==============================================================================
captured: 2026-09-15T07:07:28.552801366Z
-- first startup — V1 and V3 only --
applied: V1, V3
-- second startup — outOfOrder=false (Flyway default) --
context failed to start: FlywayValidateException: Validate failed: Migrations have failed validation
Detected resolved migration not applied to database: 2.
To ignore this migration, set -ignoreMigrationPatterns='*:ignored'. To allow executing this migration, set -outOfOrder=true.
Need more flexibility with validation rules? Learn more: https://help.red-gate.com/help/flyway-cli12/help_4.aspx?topic=flyway-blog/older-posts/customize-validation-rules-with-ignoremigrationpatterns
installed_rank | version | description | success
---------------+---------+-------------------------------------------+--------
-1 | NULL | << Flyway Schema History table created >> | true
1 | 1 | init | true
2 | 3 | add note index | true
(3 rows)
-- third startup — outOfOrder=true --
installed_rank | version | description | success
---------------+---------+-------------------------------------------+--------
-1 | NULL | << Flyway Schema History table created >> | true
1 | 1 | init | true
2 | 3 | add note index | true
3 | 2 | add note length check | true
(4 rows)