  This note completely describes the bounded or compact Riemann-Stieltjes integral operators $T_g$ acting between the weighted Bergman space pairs $(A^p_\alpha,A^q_\beta)$ in terms of particular regularities of the holomorphic symbols $g$ on the open unit ball of $\Bbb C^n$. 
Riemann-Stieltjes Integral Operators between Weighted Bergman Spaces