set enable_seqscan=off; CREATE TABLE test_text ( i text ); INSERT INTO test_text VALUES ('a'),('ab'),('abc'),('abb'),('axy'),('xyz'); CREATE INDEX idx_text ON test_text USING rum (i); SELECT * FROM test_text WHERE i<'abc' ORDER BY i; SELECT * FROM test_text WHERE i<='abc' ORDER BY i; SELECT * FROM test_text WHERE i='abc' ORDER BY i; SELECT * FROM test_text WHERE i>='abc' ORDER BY i; SELECT * FROM test_text WHERE i>'abc' ORDER BY i; CREATE TABLE test_text_o AS SELECT id::text, t FROM tsts; SELECT id FROM test_text_o WHERE t @@ 'wr&qh' AND id <= '400' ORDER BY id; SELECT id FROM test_text_o WHERE t @@ 'wr&qh' AND id >= '400' ORDER BY id; CREATE INDEX test_text_o_idx ON test_text_o USING rum (t rum_tsvector_addon_ops, id) WITH (attach = 'id', to = 't'); RESET enable_indexscan; RESET enable_indexonlyscan; SET enable_bitmapscan=OFF; SET enable_seqscan = off; EXPLAIN (costs off) SELECT id FROM test_text_o WHERE t @@ 'wr&qh' AND id <= '400' ORDER BY id; SELECT id FROM test_text_o WHERE t @@ 'wr&qh' AND id <= '400' ORDER BY id; EXPLAIN (costs off) SELECT id FROM test_text_o WHERE t @@ 'wr&qh' AND id >= '400' ORDER BY id; SELECT id FROM test_text_o WHERE t @@ 'wr&qh' AND id >= '400' ORDER BY id; CREATE TABLE test_text_a AS SELECT id::text, t FROM tsts; CREATE INDEX test_text_a_idx ON test_text_a USING rum (t rum_tsvector_addon_ops, id) WITH (attach = 'id', to = 't', order_by_attach='t'); EXPLAIN (costs off) SELECT count(*) FROM test_text_a WHERE id < '400'; SELECT count(*) FROM test_text_a WHERE id < '400'; EXPLAIN (costs off) SELECT id FROM test_text_a WHERE t @@ 'wr&qh' AND id <= '400' ORDER BY id; SELECT id FROM test_text_a WHERE t @@ 'wr&qh' AND id <= '400' ORDER BY id; EXPLAIN (costs off) SELECT id FROM test_text_a WHERE t @@ 'wr&qh' AND id >= '400' ORDER BY id; SELECT id FROM test_text_a WHERE t @@ 'wr&qh' AND id >= '400' ORDER BY id; CREATE TABLE test_text_h_o AS SELECT id::text, t FROM tsts; CREATE INDEX test_text_h_o_idx ON test_text_h_o USING rum (t rum_tsvector_hash_addon_ops, id) WITH (attach = 'id', to = 't'); EXPLAIN (costs off) SELECT id FROM test_text_h_o WHERE t @@ 'wr&qh' AND id <= '400' ORDER BY id; SELECT id FROM test_text_h_o WHERE t @@ 'wr&qh' AND id <= '400' ORDER BY id; EXPLAIN (costs off) SELECT id FROM test_text_h_o WHERE t @@ 'wr&qh' AND id >= '400' ORDER BY id; SELECT id FROM test_text_h_o WHERE t @@ 'wr&qh' AND id >= '400' ORDER BY id; CREATE TABLE test_text_h_a AS SELECT id::text, t FROM tsts; CREATE INDEX test_text_h_a_idx ON test_text_h_a USING rum (t rum_tsvector_hash_addon_ops, id) WITH (attach = 'id', to = 't', order_by_attach='t'); EXPLAIN (costs off) SELECT count(*) FROM test_text_h_a WHERE id < '400'; SELECT count(*) FROM test_text_h_a WHERE id < '400'; EXPLAIN (costs off) SELECT id FROM test_text_h_a WHERE t @@ 'wr&qh' AND id <= '400' ORDER BY id; SELECT id FROM test_text_h_a WHERE t @@ 'wr&qh' AND id <= '400' ORDER BY id; EXPLAIN (costs off) SELECT id FROM test_text_h_a WHERE t @@ 'wr&qh' AND id >= '400' ORDER BY id; SELECT id FROM test_text_h_a WHERE t @@ 'wr&qh' AND id >= '400' ORDER BY id;