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Backend Engineering
1 / 12
Data & Persistence
Advanced
An 'expand and contract' (parallel change) migration strategy for renaming a column typically proceeds as:
A
Drop the old column first, then add the new one and backfill
B
Put the app in maintenance mode and rename atomically every deploy
C
Add the new column, backfill and dual-write, migrate readers, then drop the old column in a later release
D
Rename the column in one migration and deploy code simultaneously
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