3 files changed, 5 insertions, 5 deletions
diff --git a/src/backend/optimizer/prep/prepjointree.c b/src/backend/optimizer/prep/prepjointree.c
index 048815d7b07..348c6b791f4 100644
--- a/src/backend/optimizer/prep/prepjointree.c
+++ b/src/backend/optimizer/prep/prepjointree.c
@@ -1592,7 +1592,7 @@ pull_up_simple_values(PlannerInfo *root, Node *jtnode, RangeTblEntry *rte)
 	 * Need a modifiable copy of the VALUES list to hack on, just in case it's
 	 * multiply referenced.
 	 */
-	values_list = (List *) copyObject(linitial(rte->values_lists));
+	values_list = copyObject(linitial(rte->values_lists));
 
 	/*
 	 * The VALUES RTE can't contain any Vars of level zero, let alone any that
@@ -2128,7 +2128,7 @@ pullup_replace_vars_callback(Var *var,
 				 varattno);
 
 		/* Make a copy of the tlist item to return */
-		newnode = copyObject(tle->expr);
+		newnode = (Node *) copyObject(tle->expr);
 
 		/* Insert PlaceHolderVar if needed */
 		if (rcon->need_phvs)
diff --git a/src/backend/optimizer/prep/preptlist.c b/src/backend/optimizer/prep/preptlist.c
index 824af3f54cb..de47153bace 100644
--- a/src/backend/optimizer/prep/preptlist.c
+++ b/src/backend/optimizer/prep/preptlist.c
@@ -180,7 +180,7 @@ preprocess_targetlist(PlannerInfo *root, List *tlist)
 				var->varno == result_relation)
 				continue;		/* don't need it */
 
-			if (tlist_member((Node *) var, tlist))
+			if (tlist_member((Expr *) var, tlist))
 				continue;		/* already got it */
 
 			tle = makeTargetEntry((Expr *) var,
diff --git a/src/backend/optimizer/prep/prepunion.c b/src/backend/optimizer/prep/prepunion.c
index d88738ec7cb..e327e66f6b9 100644
--- a/src/backend/optimizer/prep/prepunion.c
+++ b/src/backend/optimizer/prep/prepunion.c
@@ -1274,7 +1274,7 @@ generate_append_tlist(List *colTypes, List *colCollations,
 static List *
 generate_setop_grouplist(SetOperationStmt *op, List *targetlist)
 {
-	List	   *grouplist = (List *) copyObject(op->groupClauses);
+	List	   *grouplist = copyObject(op->groupClauses);
 	ListCell   *lg;
 	ListCell   *lt;
 
@@ -1879,7 +1879,7 @@ adjust_appendrel_attrs_mutator(Node *node,
 
 					rte = rt_fetch(appinfo->parent_relid,
 								   context->root->parse->rtable);
-					fields = (List *) copyObject(appinfo->translated_vars);
+					fields = copyObject(appinfo->translated_vars);
 					rowexpr = makeNode(RowExpr);
 					rowexpr->args = fields;
 					rowexpr->row_typeid = var->vartype;