On Mon, 2011-02-07 at 11:16 -0500, Tom Lane wrote: > Vaibhav Kaushal <vaibhavkaushal...@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 :)
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