Use separate node type for LOCAL keyword in SET TIME ZONE LOCAL

Author: nene

src/cst/Parameter.ts

@@ -8,7 +8,8 @@ export type AllParameterNodes =
   | SetParameterClause
   | SetParameterFromCurrentClause
   | ResetParameterClause
-  | AllParameters;
+  | AllParameters
+  | LocalParameterValue;
 
 export type AllParameterStatements =
   | SetParameterStmt
@@ -31,7 +32,7 @@ export interface SetTimeZoneParameterStmt extends BaseNode {
   setKw: Keyword<"SET">;
   modifierKw?: Keyword<"LOCAL" | "SESSION">;
   timeZoneKw: [Keyword<"TIME">, Keyword<"ZONE">];
-  value: Default | Keyword<"LOCAL"> | Expr;
+  value: Default | LocalParameterValue | Expr;
 }
 
 export interface ResetParameterStmt extends BaseNode {
@@ -71,3 +72,8 @@ export interface AllParameters extends BaseNode {
   type: "all_parameters";
   allKw: Keyword<"ALL">;
 }
+
+export interface LocalParameterValue extends BaseNode {
+  type: "local_parameter_value";
+  localKw: Keyword<"LOCAL">;
+}

src/parser.pegjs

@@ -5944,7 +5944,7 @@ config_parameter_value
   = literal / default / ident
 
 set_time_zone_parameter_stmt
-  = kw:(SET __) modifierKw:((LOCAL / SESSION) __)? timeZoneKw:(TIME __ ZONE __) value:(default / LOCAL / expr) {
+  = kw:(SET __) modifierKw:((LOCAL / SESSION) __)? timeZoneKw:(TIME __ ZONE __) value:(default / local_parameter_value / expr) {
     return loc({
       type: "set_time_zone_parameter_stmt",
       setKw: read(kw),
@@ -5954,6 +5954,11 @@ set_time_zone_parameter_stmt
     });
   }
 
+local_parameter_value
+  = kw:LOCAL {
+    return loc({ type: "local_parameter_value", localKw: kw });
+  }
+
 set_parameter_from_current_clause
   = kw:(SET __) name:ident fromCurrentKw:(__ FROM __ CURRENT) {
     return loc({

src/showNode/parameter.ts

@@ -15,4 +15,5 @@ export const parameterMap: FullTransformMap<string, AllParameterNodes> = {
     show([node.setKw, node.name, node.fromCurrentKw]),
   reset_parameter_clause: (node) => show([node.resetKw, node.name]),
   all_parameters: (node) => show([node.allKw]),
+  local_parameter_value: (node) => show([node.localKw]),
 };