statement ok
CREATE TABLE data (a INT, b INT, c FLOAT, d DECIMAL, PRIMARY KEY (a, b, c), INDEX d_idx (d))

# Generate all combinations of values 1 to 20.
statement ok
INSERT INTO data SELECT a, b, c::FLOAT, NULL FROM
   generate_series(1, 20) AS a(a),
   generate_series(1, 20) AS b(b),
   generate_series(1, 20) AS c(c)
