-- Install 'Case Ignore Test Extension'
create extension citext;

-- Make a request
select 'Thomas'::citext in ('thomas', 'tiago');

select name from users where name::citext in ('thomas', 'tiago');

限制使用ILIKE

select id from groups where name ILIKE 'adminstration';

如果你来，expressjs的背景和名称是一个变量 使用

select id from groups where name ILIKE $1;

用ILIKE代替LIKE

SELECT id FROM groups WHERE name ILIKE 'Administrator'

select id from groups where name in ('administrator', 'ADMINISTRATOR', 'Administrator')

如果你不仅想要大写/小写，还想要变音符，你可以实现你自己的func:

CREATE EXTENSION unaccent;

CREATE OR REPLACE FUNCTION lower_unaccent(input text)
 RETURNS text
 LANGUAGE plpgsql
AS $function$
BEGIN
    return lower(unaccent(input));
END;
$function$;

调用是then

select lower_unaccent('Hôtel')
>> 'hotel'

你可以用ILIKE。即。

SELECT id FROM groups where name ILIKE 'administrator'