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henrik committed Jan 22, 2020
1 parent 4d203d9 commit 9ad733a224edb509c042c1dec6689b00de51fc77
Showing with 1 addition and 1 deletion.
  1. +1 −1 deploy_without_downtime/README.md
@@ -40,7 +40,7 @@ Specifically:

* Step 1: Add the column as a NULLable column without a default.
* Step 2: Set the default value in batches, some records at a time.
* Step 3: Make the column NOT NULL with a default. (Or just add a default, keeping it NULLable).
* Step 3: Make the column NOT NULL with a default. (Or just add a default, keeping it NULLable.)

* **Removing columns** is never safe.
The old app will attempt to use the cached column name and will break things.

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