Thanks for confirming, so I know I'm not going crazy :) FWIW, it works on 10.3 to 10.8 (I think) and looks like a regression.
psql (10.3 (Debian 10.3-2)) Type "help" for help. test=# create table users(id serial primary key, name varchar(255), email varchar(255), age int); CREATE TABLE Time: 26.650 ms test=# create index users_name_idx on users(name); create index users_email_idx on users(email); CREATE INDEX Time: 15.660 ms CREATE INDEX Time: 12.065 ms test=# alter table users alter column name type text, alter column email type text; ALTER TABLE Time: 7.213 ms test=# select version(); version --------------------------------------------------------------------------------------------------------- PostgreSQL 10.3 (Debian 10.3-2) on x86_64-pc-linux-gnu, compiled by gcc (Debian 7.3.0-11) 7.3.0, 64-bit (1 row) Time: 2.683 ms
