Redshift - How to remove NOT NULL constraint?

Question

Since Redshift does not support ALTER COLUMN, I would like to know if it\'s possible to remove the NOT NULL constraints from columns in Redshift.

Answer 1

There is no way to change column on Redshift.

I can suggest you to create new column, copy values from old to new column and drop old column.

ALTER TABLE Table1 ADD COLUMN new_column (___correct_column_definition___);
UPDATE Table1 SET new_column = column;
ALTER TABLE Table1 DROP COLUMN column;
ALTER TABLE Table1 RENAME COLUMN new_column TO column;