CREATE EXTENSION pg_trgm;
CREATE EXTENSION unaccent;
CREATE TABLE tt1 (value text, testfield int);
INSERT INTo tt1 (value, testfield)
(SELECT generate_series::text || ' ' || (generate_series+1)::text,
generate_series % 7 FROM generate_series(1000000, 2000000));
CREATE OR REPLACE FUNCTION f_unaccent(text)
RETURNS text
LANGUAGE sql
IMMUTABLE PARALLEL SAFE
SET search_path TO public
AS $function$
SELECT unaccent('public.unaccent', $1)
$function$
;
CREATE INDEX qweqwe ON tt1 USING gin (f_unaccent(value) gin_trgm_ops)
WHERE testfield < 3;
analyze tt1;
explain select * from tt1 WHERE f_unaccent(value) like f_unaccent('%237%') AND testfield < 3;