Vaibhav Kaushal <vaibhavkaushal123@gmail.com> writes:
> Hi,
> I find that ExecInitExpr creates a ExprState tree (and so say the
> comments above the function in the source). Also, it seems to decide
> which function would get called when the expression is to be evaluated
> when ExecQual runs, by setting the function pointer, for example:
> bstate->xprstate.evalfunc = (ExprStateEvalFunc)ExecEvalAnd;
> But ExecQual goes through a List, whereas, ExecInitExpr creates a tree.
> So is that same tree converted to a qual list or are we adding some more
> information.
ExecInitExpr produces a List of state trees from a List of expr trees
--- look at the last case in its switch.
regards, tom lane