asmhatreandClaude Sonnet 5 a875bea55a db-migrations-expand-contract: add a dedicated reproduction for the DDL-collision exception ...

While writing the article, chapter 14's first failure mode (a concurrent statement
seeing "Table CUSTOMERS not found" while DROP COLUMN runs) was described from the
live load-generator run but had no dedicated, committed reproduction of its own -
CustomerService's own retry would silently absorb it if triggered through the
service layer. DdlCollisionExceptionTest reproduces it directly at the raw JDBC
level, and the chapter and README now link to its captured transcript.

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_019Fb7vW8vLyLKngBc4R3huA

2026-09-16 19:33:31 +00:00

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02-expand-backward-compatible.txt

Add db-migrations-expand-contract: zero-downtime schema migrations proven with a real 4-deploy rolling run

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04-dual-write-consistency.txt

Add db-migrations-expand-contract: zero-downtime schema migrations proven with a real 4-deploy rolling run

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06-not-null-trap.txt

Add db-migrations-expand-contract: zero-downtime schema migrations proven with a real 4-deploy rolling run

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07-backfill-window-bug.txt

Add db-migrations-expand-contract: zero-downtime schema migrations proven with a real 4-deploy rolling run

2026-09-16 19:22:48 +00:00

08-mixed-stage-rolling-window.txt

Add db-migrations-expand-contract: zero-downtime schema migrations proven with a real 4-deploy rolling run

2026-09-16 19:22:48 +00:00

09-contract-safety.txt

Add db-migrations-expand-contract: zero-downtime schema migrations proven with a real 4-deploy rolling run

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10-drop-too-soon.txt

Add db-migrations-expand-contract: zero-downtime schema migrations proven with a real 4-deploy rolling run

2026-09-16 19:22:48 +00:00

11-live-deploy-sequence.txt

Add db-migrations-expand-contract: zero-downtime schema migrations proven with a real 4-deploy rolling run

2026-09-16 19:22:48 +00:00

12-load-generator-summary.txt

Add db-migrations-expand-contract: zero-downtime schema migrations proven with a real 4-deploy rolling run

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13-schema-diagnostics-timeline.txt

Add db-migrations-expand-contract: zero-downtime schema migrations proven with a real 4-deploy rolling run

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14-ddl-collision-exception.txt

db-migrations-expand-contract: add a dedicated reproduction for the DDL-collision exception

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14-ddl-silent-data-loss.txt

Add db-migrations-expand-contract: zero-downtime schema migrations proven with a real 4-deploy rolling run

2026-09-16 19:22:48 +00:00