The question has two parts.

1. Can I get the values inside the dynamic component in a scalar query.

class A
{
String a;
int b;
Map dynamicComponent;

}

can i say

select a,b,dynamicComponent.c from A where .....


2.

can I have the dynamic components in the query.

select A where dynamicComponent.c="somethign";

never tryed but I would say yes and yes