Fix for schema selection in pg adapter.

src/lib/filters.ts

@@ -1,5 +1,5 @@
 export const percentFilter = (data: any[]) => {
-  if (!data) return [];
+  if (!Array.isArray(data)) return [];
   const total = data.reduce((n, { y }) => n + y, 0);
   return data.map(({ x, y, ...props }) => ({ x, y, z: total ? (y / total) * 100 : 0, ...props }));
 };