Require non-NULL pstate for all addRangeTableEntryFor* functions.

Per discussion, it's better to have a consistent coding rule here.

Michael Paquier, per a node from Greg Stark referencing an old post
from Tom Lane.

Author: robertmhaas

src/backend/commands/view.c

@@ -345,6 +345,7 @@ UpdateRangeTableOfViewParse(Oid viewOid, Query *viewParse)
 	List	   *new_rt;
 	RangeTblEntry *rt_entry1,
 			   *rt_entry2;
+	ParseState *pstate;
 
 	/*
 	 * Make a copy of the given parsetree.  It's not so much that we don't
@@ -356,17 +357,20 @@ UpdateRangeTableOfViewParse(Oid viewOid, Query *viewParse)
 	 */
 	viewParse = (Query *) copyObject(viewParse);
 
+	/* Create a dummy ParseState for addRangeTableEntryForRelation */
+	pstate = make_parsestate(NULL);
+
 	/* need to open the rel for addRangeTableEntryForRelation */
 	viewRel = relation_open(viewOid, AccessShareLock);
 
 	/*
 	 * Create the 2 new range table entries and form the new range table...
 	 * OLD first, then NEW....
 	 */
-	rt_entry1 = addRangeTableEntryForRelation(NULL, viewRel,
+	rt_entry1 = addRangeTableEntryForRelation(pstate, viewRel,
 											  makeAlias("old", NIL),
 											  false, false);
-	rt_entry2 = addRangeTableEntryForRelation(NULL, viewRel,
+	rt_entry2 = addRangeTableEntryForRelation(pstate, viewRel,
 											  makeAlias("new", NIL),
 											  false, false);
 	/* Must override addRangeTableEntry's default access-check flags */

src/backend/optimizer/plan/subselect.c

@@ -1233,6 +1233,7 @@ convert_ANY_sublink_to_join(PlannerInfo *root, SubLink *sublink,
 	RangeTblRef *rtr;
 	List	   *subquery_vars;
 	Node	   *quals;
+	ParseState *pstate;
 
 	Assert(sublink->subLinkType == ANY_SUBLINK);
 
@@ -1264,6 +1265,9 @@ convert_ANY_sublink_to_join(PlannerInfo *root, SubLink *sublink,
 	if (contain_volatile_functions(sublink->testexpr))
 		return NULL;
 
+	/* Create a dummy ParseState for addRangeTableEntryForSubquery */
+	pstate = make_parsestate(NULL);
+
 	/*
 	 * Okay, pull up the sub-select into upper range table.
 	 *
@@ -1272,7 +1276,7 @@ convert_ANY_sublink_to_join(PlannerInfo *root, SubLink *sublink,
 	 * below). Therefore this is a lot easier than what pull_up_subqueries has
 	 * to go through.
 	 */
-	rte = addRangeTableEntryForSubquery(NULL,
+	rte = addRangeTableEntryForSubquery(pstate,
 										subselect,
 										makeAlias("ANY_subquery", NIL),
 										false,

src/backend/parser/parse_relation.c

@@ -1245,6 +1245,8 @@ addRangeTableEntryForRelation(ParseState *pstate,
 	RangeTblEntry *rte = makeNode(RangeTblEntry);
 	char	   *refname = alias ? alias->aliasname : RelationGetRelationName(rel);
 
+	Assert(pstate != NULL);
+
 	rte->rtekind = RTE_RELATION;
 	rte->alias = alias;
 	rte->relid = RelationGetRelid(rel);
@@ -1276,8 +1278,7 @@ addRangeTableEntryForRelation(ParseState *pstate,
 	 * Add completed RTE to pstate's range table list, but not to join list
 	 * nor namespace --- caller must do that if appropriate.
 	 */
-	if (pstate != NULL)
-		pstate->p_rtable = lappend(pstate->p_rtable, rte);
+	pstate->p_rtable = lappend(pstate->p_rtable, rte);
 
 	return rte;
 }
@@ -1302,6 +1303,8 @@ addRangeTableEntryForSubquery(ParseState *pstate,
 	int			varattno;
 	ListCell   *tlistitem;
 
+	Assert(pstate != NULL);
+
 	rte->rtekind = RTE_SUBQUERY;
 	rte->relid = InvalidOid;
 	rte->subquery = subquery;
@@ -1354,8 +1357,7 @@ addRangeTableEntryForSubquery(ParseState *pstate,
 	 * Add completed RTE to pstate's range table list, but not to join list
 	 * nor namespace --- caller must do that if appropriate.
 	 */
-	if (pstate != NULL)
-		pstate->p_rtable = lappend(pstate->p_rtable, rte);
+	pstate->p_rtable = lappend(pstate->p_rtable, rte);
 
 	return rte;
 }
@@ -1391,6 +1393,8 @@ addRangeTableEntryForFunction(ParseState *pstate,
 	int			natts,
 				totalatts;
 
+	Assert(pstate != NULL);
+
 	rte->rtekind = RTE_FUNCTION;
 	rte->relid = InvalidOid;
 	rte->subquery = NULL;
@@ -1608,8 +1612,7 @@ addRangeTableEntryForFunction(ParseState *pstate,
 	 * Add completed RTE to pstate's range table list, but not to join list
 	 * nor namespace --- caller must do that if appropriate.
 	 */
-	if (pstate != NULL)
-		pstate->p_rtable = lappend(pstate->p_rtable, rte);
+	pstate->p_rtable = lappend(pstate->p_rtable, rte);
 
 	return rte;
 }
@@ -1633,6 +1636,8 @@ addRangeTableEntryForValues(ParseState *pstate,
 	int			numaliases;
 	int			numcolumns;
 
+	Assert(pstate != NULL);
+
 	rte->rtekind = RTE_VALUES;
 	rte->relid = InvalidOid;
 	rte->subquery = NULL;
@@ -1680,8 +1685,7 @@ addRangeTableEntryForValues(ParseState *pstate,
 	 * Add completed RTE to pstate's range table list, but not to join list
 	 * nor namespace --- caller must do that if appropriate.
 	 */
-	if (pstate != NULL)
-		pstate->p_rtable = lappend(pstate->p_rtable, rte);
+	pstate->p_rtable = lappend(pstate->p_rtable, rte);
 
 	return rte;
 }
@@ -1703,6 +1707,8 @@ addRangeTableEntryForJoin(ParseState *pstate,
 	Alias	   *eref;
 	int			numaliases;
 
+	Assert(pstate != NULL);
+
 	/*
 	 * Fail if join has too many columns --- we must be able to reference any
 	 * of the columns with an AttrNumber.
@@ -1748,8 +1754,7 @@ addRangeTableEntryForJoin(ParseState *pstate,
 	 * Add completed RTE to pstate's range table list, but not to join list
 	 * nor namespace --- caller must do that if appropriate.
 	 */
-	if (pstate != NULL)
-		pstate->p_rtable = lappend(pstate->p_rtable, rte);
+	pstate->p_rtable = lappend(pstate->p_rtable, rte);
 
 	return rte;
 }
@@ -1774,6 +1779,8 @@ addRangeTableEntryForCTE(ParseState *pstate,
 	int			varattno;
 	ListCell   *lc;
 
+	Assert(pstate != NULL);
+
 	rte->rtekind = RTE_CTE;
 	rte->ctename = cte->ctename;
 	rte->ctelevelsup = levelsup;
@@ -1848,8 +1855,7 @@ addRangeTableEntryForCTE(ParseState *pstate,
 	 * Add completed RTE to pstate's range table list, but not to join list
 	 * nor namespace --- caller must do that if appropriate.
 	 */
-	if (pstate != NULL)
-		pstate->p_rtable = lappend(pstate->p_rtable, rte);
+	pstate->p_rtable = lappend(pstate->p_rtable, rte);
 
 	return rte;
 }