postgres=> insert into test_rum_add select generate_series(1,10000000), tsvector 'a b c', clock_timestamp();
INSERT 0 10000000
postgres=> create index idx_test_rum_add_1 on test_rum_add using rum (arr rum_tsvector_hash_addon_ops, ts) with (attach='ts', to='arr');
CREATE INDEX
postgres=> select * from test_rum_add where arr @@ 'a|b' order by ts <=> '2020-05-23' limit 10;
 id | arr | ts 
----------+-------------+----------------------------
 10000000 | 'a' 'b' 'c' | 2020年05月22日 17:43:01.945628
 9999999 | 'a' 'b' 'c' | 2020年05月22日 17:43:01.945628
 9999998 | 'a' 'b' 'c' | 2020年05月22日 17:43:01.945627
 9999997 | 'a' 'b' 'c' | 2020年05月22日 17:43:01.945627
 9999996 | 'a' 'b' 'c' | 2020年05月22日 17:43:01.945626
 9999995 | 'a' 'b' 'c' | 2020年05月22日 17:43:01.945625
 9999994 | 'a' 'b' 'c' | 2020年05月22日 17:43:01.945624
 9999993 | 'a' 'b' 'c' | 2020年05月22日 17:43:01.945624
 9999992 | 'a' 'b' 'c' | 2020年05月22日 17:43:01.945623
 9999991 | 'a' 'b' 'c' | 2020年05月22日 17:43:01.945623
(10 rows)
postgres=> explain (analyze,verbose,timing,costs,buffers) select * from test_rum_add where arr @@ 'a|b' order by ts <=> '2020-05-23' limit 10;
 QUERY PLAN 
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit (cost=13.20..13.51 rows=10 width=40) (actual time=6335.531..6335.539 rows=10 loops=1)
 Output: id, arr, ts, ((ts <=> '2020-05-23 00:00:00'::timestamp without time zone))
 Buffers: shared hit=28705, temp read=42536 written=67010
 -> Index Scan using idx_test_rum_add_1 on public.test_rum_add (cost=13.20..309926.60 rows=10000000 width=40) (actual time=6335.529..6335.534 rows=10 loops=1)
 Output: id, arr, ts, (ts <=> '2020-05-23 00:00:00'::timestamp without time zone)
 Index Cond: (test_rum_add.arr @@ '''a'' | ''b'''::tsquery)
 Order By: (test_rum_add.ts <=> '2020-05-23 00:00:00'::timestamp without time zone)
 Buffers: shared hit=28705, temp read=42536 written=67010
 Planning Time: 0.050 ms
 Execution Time: 6391.589 ms
(10 rows)
postgres=> explain (analyze,verbose,timing,costs,buffers) select * from test_rum_add where arr @@ 'a|b' limit 10;
 QUERY PLAN 
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit (cost=13.20..13.46 rows=10 width=32) (actual time=2380.119..2380.126 rows=10 loops=1)
 Output: id, arr, ts
 Buffers: shared hit=28706, temp read=1 written=14678
 -> Index Scan using idx_test_rum_add_1 on public.test_rum_add (cost=13.20..259926.60 rows=10000000 width=32) (actual time=2380.117..2380.122 rows=10 loops=1)
 Output: id, arr, ts
 Index Cond: (test_rum_add.arr @@ '''a'' | ''b'''::tsquery)
 Buffers: shared hit=28706, temp read=1 written=14678
 Planning Time: 0.072 ms
 Execution Time: 2414.058 ms
(9 rows)