1 CREATE TABLE insert_small_block_performance ( `x` String, `a` DEFAULT SHA256(x), `b` DEFAULT SHA256(toString(a)), `c` DEFAULT SHA256(toString(b)), `d` DEFAULT SHA256(toString(c)), `e` DEFAULT SHA256(toString(d)), `f` DEFAULT SHA256(toString(e)), `g` DEFAULT SHA256(toString(f)), `h` DEFAULT SHA256(toString(g)), `i` DEFAULT SHA256(toString(h)), `j` DEFAULT SHA256(toString(i)), `k` DEFAULT SHA256(toString(j)), `l` DEFAULT SHA256(toString(k)), `m` DEFAULT SHA256(toString(l)), `n` DEFAULT SHA256(toString(m)), `o` DEFAULT SHA256(toString(n)), `p` DEFAULT SHA256(toString(o)), `q` DEFAULT SHA256(toString(p)), `r` DEFAULT SHA256(toString(q)), `s` DEFAULT SHA256(toString(r)), `t` DEFAULT SHA256(toString(s)), `u` DEFAULT SHA256(toString(t)), `v` DEFAULT SHA256(toString(u)), `w` DEFAULT SHA256(toString(v)) ) ENGINE = Null; INSERT INTO insert_small_block_performance (x) SELECT toString(number) FROM numbers(10000); DROP TABLE IF EXISTS insert_small_block_performance