Let $X,Y$ be varieties over $\mathbb{C}$, and $D(X),D(Y)$ be the derived categories of bounded complex of coherent sheaves. Let $U \subset X, V \subset Y$ be open subvarieties， and let $X-U, Y-V$ have codimensions $c_1, c_2$ respectively. Assume $U $ is isomorphism to $V$. I heard a result that says: when the codimension $c_1, c_2$ high enough, then $D(X)$ is derived equivalent to $D(Y)$.

Does anyone know any references or the precise statement of any results along this direction, I am especially interest in the upper bound of codimension.