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Add db-migrations-flyway-liquibase: Flyway vs Liquibase migrations, rollbacks and baselines on Spring Boot 4.1

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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
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asmhatre
2026-09-15 07:08:57 +00:00
co-authored by Claude Sonnet 5
parent b02fbe1416
commit 3908331431
61 changed files with 3128 additions and 0 deletions
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db-migrations-flyway-liquibase/docs/output/13-liquibase-lock-contention.txt
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================================================================
Liquibase: two instances calling update() at the same moment
================================================================
captured: 2026-09-15T07:07:26.705434740Z
instance A update() took 874ms
instance B update() took 10097ms
wall-clock time for both, run concurrently: 10099ms
-- databasechangeloglock after both finished --
ID | LOCKED | LOCKEDBY
---+--------+---------
1 | false | NULL
(1 row)
-- databasechangelog after both finished --
ID | AUTHOR | EXECTYPE
--------------+--------+---------
1-slow-change | ankurm | EXECUTED
(1 row)