version
------------------------------------------------------------------------------------------------------------------
 PostgreSQL 12.5 (Debian 12.5-1.pgdg100+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 8.3.0-6) 8.3.0, 64-bit
(1 row)

DROP TABLE
CREATE TABLE
CREATE INDEX
COPY 46557
DROP TABLE
CREATE TABLE
CREATE INDEX
CREATE TABLE
INSERT 0 46557
INSERT 0 46557
                                          QUERY PLAN
----------------------------------------------------------------------------------------------
 Delete on t1  (cost=595.12..1201.93 rows=3602 width=12)
   ->  Hash Join  (cost=595.12..1201.93 rows=3602 width=12)
         Hash Cond: (((t1.id1)::text = (t2.id1)::text) AND ((t1.id2)::text = (t2.id2)::text))
         ->  Seq Scan on t1  (cost=0.00..487.06 rows=14406 width=170)
         ->  Hash  (cost=573.50..573.50 rows=1441 width=170)
               ->  HashAggregate  (cost=559.09..573.50 rows=1441 width=170)
                     Group Key: (t2.id1)::text, (t2.id2)::text
                     ->  Seq Scan on t2  (cost=0.00..487.06 rows=14406 width=170)
(8 rows)

DELETE 46557
 id1 | id2
-----+-----
(0 rows)

DELETE 0
INSERT 0 46557
ANALYZE
                                          QUERY PLAN
----------------------------------------------------------------------------------------------
 Delete on t1  (cost=1506.92..2718.77 rows=7192 width=12)
   ->  Hash Semi Join  (cost=1506.92..2718.77 rows=7192 width=12)
         Hash Cond: (((t1.id1)::text = (t2.id1)::text) AND ((t1.id2)::text = (t2.id2)::text))
         ->  Seq Scan on t1  (cost=0.00..972.70 rows=28770 width=170)
         ->  Hash  (cost=808.57..808.57 rows=46557 width=36)
               ->  Seq Scan on t2  (cost=0.00..808.57 rows=46557 width=36)
(6 rows)

DELETE 46557
 id1 | id2
-----+-----
(0 rows)