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catalog-backend: address review comments on search FK migration

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- Close PG race window: drop old FK and add NOT VALID FK before batch
  cleanup, so no new orphans can be inserted during cleanup
- Extract batch-delete helpers (batchDeleteOrphansPg, batchDeleteOrphansMysql)
  to reduce duplication across up/down and dialects
- Fix ShareUpdateExclusiveLock comment to be more precise
- Make changeset message more descriptive

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Fredrik Adelöw <freben@spotify.com>
This commit is contained in:
Fredrik Adelöw
2026-03-11 14:16:25 +01:00
parent 1ecf82a5c2
commit 89a1c313d0
2 changed files with 64 additions and 73 deletions
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.changeset/ready-ghosts-fail.md
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@@ -2,4 +2,4 @@
'@backstage/plugin-catalog-backend': patch
---
Optimize a catalog migration for big databases
Make the `search` foreign key catalog migration non-blocking on large tables by using batch deletes and PostgreSQL `NOT VALID`/`VALIDATE` to reduce lock duration