Remove uniqueness of index in PostgreSQL

Question

In my PostgreSQL database I have a unique index created this way:

CREATE UNIQUE INDEX  ON  USING btree (my_column)

Answer 1

You may be able to remove the unique CONSTRAINT, and not the INDEX itself.

Check your CONSTRAINTS via select * from information_schema.table_constraints;

Then if you find one, you should be able to drop it like:

ALTER TABLE DROP CONSTRAINT

Edit: a related issue is described in this question