1.7.8 CQL Arithmetic UPDATE with an INNER JOIN and a WHERE restriction

{[],
 update(se_lt_x, [c-(C + 2 * F + 20)]),
 @ :: [a-A, c-C] =*= se_lt_y :: [d-A, f-F],
 C < 100}

This joins the table being updated (table se_lt_x) on table se_lt_y where se_lt_x.a = se_lt_y.a and where se_lt_x.c < 200 then updates each identified row se_lt_x.c with the specified expression.