mcadariu

\set small_id random(1, 10000)
\set medium_id random(1, 1000000)
\set large_id random(1, 10000000)
\set range_start random(1, 9900000)

\set op random(1, 4)

SELECT :op = 1 AS _matches \gset
\if :_matches
    SELECT * FROM small WHERE id = :small_id;