E1 Validating table with a new constraint
Description
Triggered when: A new constraint was added and it is already VALID.
Effect: This blocks all table access until all rows are validated.
Workaround: Add the constraint as NOT VALID and validate it with ALTER TABLE ... VALIDATE CONSTRAINT later.
Detected by: eugene lint and eugene trace
Problematic migration
-- 1.sql
create table authors(
id integer generated always as identity
primary key,
name text
);
-- 2.sql
set local lock_timeout = '2s';
alter table authors
add constraint name_not_null
check (name is not null);
Safer migration
-- 1.sql
create table authors(
id integer generated always as identity
primary key,
name text
);
-- 2.sql
set local lock_timeout = '2s';
alter table authors
add constraint name_not_null
check (name is not null) not valid;
-- 3.sql
set local lock_timeout = '2s';
alter table authors
validate constraint name_not_null;