set extra_float_digits =0; SELECT set_smlar_limit(0.6); SELECT t, ARRAY( SELECT v::text FROM generate_series(1, t) as v ) AS v INTO test_text FROM generate_series(1, 200) as t; SELECT t, smlar(v, '{10,9,8,7,6,5,4,3,2,1}') AS s FROM test_text WHERE v % '{10,9,8,7,6,5,4,3,2,1}' ORDER BY s DESC, t; SELECT t, smlar(v, '{50,49,8,7,6,5,4,33,2,1}') AS s FROM test_text WHERE v % '{50,49,8,7,6,5,4,33,2,1}' ORDER BY s DESC, t; CREATE INDEX idx_test_text ON test_text USING gist (v _text_sml_ops); SET enable_seqscan=off; SELECT t, smlar(v, '{10,9,8,7,6,5,4,3,2,1}') AS s FROM test_text WHERE v % '{10,9,8,7,6,5,4,3,2,1}' ORDER BY s DESC, t; SELECT t, smlar(v, '{50,49,8,7,6,5,4,33,2,1}') AS s FROM test_text WHERE v % '{50,49,8,7,6,5,4,33,2,1}' ORDER BY s DESC, t; DROP INDEX idx_test_text; CREATE INDEX idx_test_text ON test_text USING gin (v _text_sml_ops); SELECT t, smlar(v, '{10,9,8,7,6,5,4,3,2,1}') AS s FROM test_text WHERE v % '{10,9,8,7,6,5,4,3,2,1}' ORDER BY s DESC, t; SELECT t, smlar(v, '{50,49,8,7,6,5,4,33,2,1}') AS s FROM test_text WHERE v % '{50,49,8,7,6,5,4,33,2,1}' ORDER BY s DESC, t; SET enable_seqscan=on;