*** a/src/backend/parser/gram.y
--- b/src/backend/parser/gram.y
***************
*** 529,534 **** static Node *makeRecursiveViewSelect(char *relname, List *aliases, Node *query);
--- 529,535 ----
  %type <ival>	Iconst SignedIconst
  %type <str>		Sconst comment_text notify_payload
  %type <str>		RoleId opt_boolean_or_string
+ %type <node>	opt_boolean_or_string_or_numeric
  %type <list>	var_list
  %type <str>		ColId ColLabel var_name type_function_name param_name
  %type <str>		NonReservedWord NonReservedWord_or_Sconst
***************
*** 1584,1589 **** iso_level:	READ UNCOMMITTED						{ $$ = "read uncommitted"; }
--- 1585,1595 ----
  			| SERIALIZABLE							{ $$ = "serializable"; }
  		;
  
+ opt_boolean_or_string_or_numeric:
+ 			opt_boolean_or_string			{ $$ = (Node *) makeString($1); }
+ 			| NumericOnly					{ $$ = (Node *) $1; }
+ 		;
+ 
  opt_boolean_or_string:
  			TRUE_P									{ $$ = "true"; }
  			| FALSE_P								{ $$ = "false"; }
***************
*** 3099,3106 **** copy_generic_opt_elem:
  		;
  
  copy_generic_opt_arg:
! 			opt_boolean_or_string			{ $$ = (Node *) makeString($1); }
! 			| NumericOnly					{ $$ = (Node *) $1; }
  			| '*'							{ $$ = (Node *) makeNode(A_Star); }
  			| '(' copy_generic_opt_arg_list ')'		{ $$ = (Node *) $2; }
  			| /* EMPTY */					{ $$ = NULL; }
--- 3105,3111 ----
  		;
  
  copy_generic_opt_arg:
! 			opt_boolean_or_string_or_numeric			{ $$ = $1; }
  			| '*'							{ $$ = (Node *) makeNode(A_Star); }
  			| '(' copy_generic_opt_arg_list ')'		{ $$ = (Node *) $2; }
  			| /* EMPTY */					{ $$ = NULL; }
***************
*** 10582,10588 **** vac_analyze_option_name:
  		;
  
  vac_analyze_option_arg:
! 			opt_boolean_or_string					{ $$ = (Node *) makeString($1); }
  			| /* EMPTY */		 					{ $$ = NULL; }
  		;
  
--- 10587,10593 ----
  		;
  
  vac_analyze_option_arg:
! 			opt_boolean_or_string_or_numeric					{ $$ = $1; }
  			| /* EMPTY */		 					{ $$ = NULL; }
  		;
  
***************
*** 10707,10714 **** explain_option_name:
  		;
  
  explain_option_arg:
! 			opt_boolean_or_string	{ $$ = (Node *) makeString($1); }
! 			| NumericOnly			{ $$ = (Node *) $1; }
  			| /* EMPTY */			{ $$ = NULL; }
  		;
  
--- 10712,10718 ----
  		;
  
  explain_option_arg:
! 			opt_boolean_or_string_or_numeric	{ $$ = $1; }
  			| /* EMPTY */			{ $$ = NULL; }
  		;