Allow type_func_name_keywords in even more places

A while back, 2c92edad allowed
type_func_name_keywords to be used in more places, including role
identifiers.  Unfortunately, that commit missed out on cases where
name_list was used for lists-of-roles, eg: for DROP ROLE.  This
resulted in the unfortunate situation that you could CREATE a role
with a type_func_name_keywords-allowed identifier, but not DROP it
(directly- ALTER could be used to rename it to something which
could be DROP'd).

This extends allowing type_func_name_keywords to places where role
lists can be used.

Back-patch to 9.0, as 2c92edad was.

src/backend/parser/gram.y

@@ -334,7 +334,7 @@ static Node *makeRecursiveViewSelect(char *relname, List *aliases, Node *query);
 				oper_argtypes RuleActionList RuleActionMulti
 				opt_column_list columnList opt_name_list
 				sort_clause opt_sort_clause sortby_list index_params
-				name_list from_clause from_list opt_array_bounds
+				name_list role_list from_clause from_list opt_array_bounds
 				qualified_name_list any_name any_name_list
 				any_operator expr_list attrs
 				target_list opt_target_list insert_column_list set_target_list
@@ -901,7 +901,7 @@ AlterOptRoleElem:
 					$$ = makeDefElem("validUntil", (Node *)makeString($3));
 				}
 		/*	Supported but not documented for roles, for use by ALTER GROUP. */
-			| USER name_list
+			| USER role_list
 				{
 					$$ = makeDefElem("rolemembers", (Node *)$2);
 				}
@@ -965,19 +965,19 @@ CreateOptRoleElem:
 				{
 					$$ = makeDefElem("sysid", (Node *)makeInteger($2));
 				}
-			| ADMIN name_list
+			| ADMIN role_list
 				{
 					$$ = makeDefElem("adminmembers", (Node *)$2);
 				}
-			| ROLE name_list
+			| ROLE role_list
 				{
 					$$ = makeDefElem("rolemembers", (Node *)$2);
 				}
-			| IN_P ROLE name_list
+			| IN_P ROLE role_list
 				{
 					$$ = makeDefElem("addroleto", (Node *)$3);
 				}
-			| IN_P GROUP_P name_list
+			| IN_P GROUP_P role_list
 				{
 					$$ = makeDefElem("addroleto", (Node *)$3);
 				}
@@ -1084,14 +1084,14 @@ AlterUserSetStmt:
  *****************************************************************************/
 
 DropRoleStmt:
-			DROP ROLE name_list
+			DROP ROLE role_list
 				{
 					DropRoleStmt *n = makeNode(DropRoleStmt);
 					n->missing_ok = FALSE;
 					n->roles = $3;
 					$$ = (Node *)n;
 				}
-			| DROP ROLE IF_P EXISTS name_list
+			| DROP ROLE IF_P EXISTS role_list
 				{
 					DropRoleStmt *n = makeNode(DropRoleStmt);
 					n->missing_ok = TRUE;
@@ -1110,14 +1110,14 @@ DropRoleStmt:
  *****************************************************************************/
 
 DropUserStmt:
-			DROP USER name_list
+			DROP USER role_list
 				{
 					DropRoleStmt *n = makeNode(DropRoleStmt);
 					n->missing_ok = FALSE;
 					n->roles = $3;
 					$$ = (Node *)n;
 				}
-			| DROP USER IF_P EXISTS name_list
+			| DROP USER IF_P EXISTS role_list
 				{
 					DropRoleStmt *n = makeNode(DropRoleStmt);
 					n->roles = $5;
@@ -1152,7 +1152,7 @@ CreateGroupStmt:
  *****************************************************************************/
 
 AlterGroupStmt:
-			ALTER GROUP_P RoleId add_drop USER name_list
+			ALTER GROUP_P RoleId add_drop USER role_list
 				{
 					AlterRoleStmt *n = makeNode(AlterRoleStmt);
 					n->role = $3;
@@ -1176,14 +1176,14 @@ add_drop:	ADD_P									{ $$ = +1; }
  *****************************************************************************/
 
 DropGroupStmt:
-			DROP GROUP_P name_list
+			DROP GROUP_P role_list
 				{
 					DropRoleStmt *n = makeNode(DropRoleStmt);
 					n->missing_ok = FALSE;
 					n->roles = $3;
 					$$ = (Node *)n;
 				}
-			| DROP GROUP_P IF_P EXISTS name_list
+			| DROP GROUP_P IF_P EXISTS role_list
 				{
 					DropRoleStmt *n = makeNode(DropRoleStmt);
 					n->missing_ok = TRUE;
@@ -5122,7 +5122,7 @@ DropOpFamilyStmt:
  *
  *****************************************************************************/
 DropOwnedStmt:
-			DROP OWNED BY name_list opt_drop_behavior
+			DROP OWNED BY role_list opt_drop_behavior
 				{
 					DropOwnedStmt *n = makeNode(DropOwnedStmt);
 					n->roles = $4;
@@ -5132,7 +5132,7 @@ DropOwnedStmt:
 		;
 
 ReassignOwnedStmt:
-			REASSIGN OWNED BY name_list TO name
+			REASSIGN OWNED BY role_list TO name
 				{
 					ReassignOwnedStmt *n = makeNode(ReassignOwnedStmt);
 					n->roles = $4;
@@ -5998,7 +5998,7 @@ function_with_argtypes:
  *****************************************************************************/
 
 GrantRoleStmt:
-			GRANT privilege_list TO name_list opt_grant_admin_option opt_granted_by
+			GRANT privilege_list TO role_list opt_grant_admin_option opt_granted_by
 				{
 					GrantRoleStmt *n = makeNode(GrantRoleStmt);
 					n->is_grant = true;
@@ -6011,7 +6011,7 @@ GrantRoleStmt:
 		;
 
 RevokeRoleStmt:
-			REVOKE privilege_list FROM name_list opt_granted_by opt_drop_behavior
+			REVOKE privilege_list FROM role_list opt_granted_by opt_drop_behavior
 				{
 					GrantRoleStmt *n = makeNode(GrantRoleStmt);
 					n->is_grant = false;
@@ -6021,7 +6021,7 @@ RevokeRoleStmt:
 					n->behavior = $6;
 					$$ = (Node*)n;
 				}
-			| REVOKE ADMIN OPTION FOR privilege_list FROM name_list opt_granted_by opt_drop_behavior
+			| REVOKE ADMIN OPTION FOR privilege_list FROM role_list opt_granted_by opt_drop_behavior
 				{
 					GrantRoleStmt *n = makeNode(GrantRoleStmt);
 					n->is_grant = false;
@@ -6067,11 +6067,11 @@ DefACLOption:
 				{
 					$$ = makeDefElem("schemas", (Node *)$3);
 				}
-			| FOR ROLE name_list
+			| FOR ROLE role_list
 				{
 					$$ = makeDefElem("roles", (Node *)$3);
 				}
-			| FOR USER name_list
+			| FOR USER role_list
 				{
 					$$ = makeDefElem("roles", (Node *)$3);
 				}
@@ -12624,6 +12624,12 @@ Iconst:		ICONST									{ $$ = $1; };
 Sconst:		SCONST									{ $$ = $1; };
 RoleId:		NonReservedWord							{ $$ = $1; };
 
+role_list:	RoleId
+					{ $$ = list_make1(makeString($1)); }
+			| role_list ',' RoleId
+					{ $$ = lappend($1, makeString($3)); }
+		;
+
 SignedIconst: Iconst								{ $$ = $1; }
 			| '+' Iconst							{ $$ = + $2; }
 			| '-' Iconst							{ $$ = - $2; }