On Mon, 2011-02-07 at 11:16 -0500, Tom Lane wrote:
> 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
Thanks a lot for the help sir. Got the point :)
-Vaibhav(*_*)
