Function addNSItemToQuery

src/backend/parser/parse_relation.c:2870–2891

* Add the given nsitem/RTE as a top-level entry in the pstate's join list * and/or namespace list. (We assume caller has checked for any * namespace conflicts.) The nsitem is always marked as unconditionally * visible, that is, not LATERAL-only. */

 * visible, that is, not LATERAL-only.
 */
void
addNSItemToQuery(ParseState *pstate, ParseNamespaceItem *nsitem,
				 bool addToJoinList,
				 bool addToRelNameSpace, bool addToVarNameSpace)
{
	if (addToJoinList)
	{
		RangeTblRef *rtr = makeNode(RangeTblRef);

		rtr->rtindex = nsitem->p_rtindex;
		pstate->p_joinlist = lappend(pstate->p_joinlist, rtr);
	}
	if (addToRelNameSpace || addToVarNameSpace)
	{
		/* Set the new nsitem's visibility flags correctly */
		nsitem->p_rel_visible = addToRelNameSpace;
		nsitem->p_cols_visible = addToVarNameSpace;
		nsitem->p_lateral_only = false;
		nsitem->p_lateral_ok = true;
		pstate->p_namespace = lappend(pstate->p_namespace, nsitem);
	}
}

/*
 * expandRTE -- expand the columns of a rangetable entry