I'm adding a text column to a table that will always be generated by a
function created as immutable. When I create the migration, the
`add_column` method call is not generating the proper `ALTER TABLE` with
the `GENERATED ALWAYS AS`:
add_column :standardized_accno, String, generated_always_as:
"standardize_accno(accno)"
The immutable function is standardize_accno, while accno is a column in the
table that already exists. The result goes into the new column,
standardized_accno.
I've verified that I can do this within psql. I'm on version 12.1 of
postgres, but version 4.49 of Sequel (wondering if that's my problem).
Any help as always much appreciated!
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