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
parent b02fbe1416
commit 3908331431
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+==================================================================
+Flyway: a repeatable migration reruns on checksum change alone
+==================================================================
+captured: 2026-09-15T07:07:28.316653172Z
+
+
+-- first startup --
+installed_rank | version | description                               | type  | checksum   
+---------------+---------+-------------------------------------------+-------+------------
+-1             | NULL    | << Flyway Schema History table created >> | TABLE | NULL       
+1              | 1       | init                                      | SQL   | -192856793 
+2              | NULL    | invoice summary view                      | SQL   | -2025099931
+(3 rows)
+
+-- invoice_summary right after creation --
+STATUS  | CNT
+--------+----
+PAID    | 1  
+PENDING | 1  
+(2 rows)
+
+-- second startup — only R__invoice_summary_view.sql changed --
+installed_rank | version | description                               | type  | checksum   
+---------------+---------+-------------------------------------------+-------+------------
+-1             | NULL    | << Flyway Schema History table created >> | TABLE | NULL       
+1              | 1       | init                                      | SQL   | -192856793 
+2              | NULL    | invoice summary view                      | SQL   | -2025099931
+3              | NULL    | invoice summary view                      | SQL   | 750256380  
+(4 rows)
+
+-- invoice_summary after the repeatable migration reran --
+STATUS  | CNT | TOTAL_CENTS
+--------+-----+------------
+PAID    | 1   | 5000       
+PENDING | 1   | 3000       
+(2 rows)