adding-stored-generated-column (US006)

Automatic fix is not available.

What it does

Checks adding of stored generated column.

Why not?

Adding an stored generated column to an already populated table will have to backfill the newly added column, causing the table to be locked in which no other operations can be performed on the table for the duration of the backfill. This will cause downtime if the table is concurrently being accessed by other clients.

When should you?

If the table is empty. If the table is not empty but is not being concurrently accessed.

Use instead:

A trigger might be a safer option.