Changed ecpg parser to allow RETURNING clauses without attached C variables.

src/interfaces/ecpg/preproc/ecpg.trailer

@@ -1877,9 +1877,8 @@ Iresult:        Iconst				{ $$ = $1; }
                 ;
 
 execute_rest: /* EMPTY */	{ $$ = EMPTY; }
-	| ecpg_using ecpg_into  { $$ = EMPTY; }
+	| ecpg_using opt_ecpg_into  { $$ = EMPTY; }
 	| ecpg_into ecpg_using  { $$ = EMPTY; }
-	| ecpg_using			{ $$ = EMPTY; }
 	| ecpg_into				{ $$ = EMPTY; }
 	;
 
@@ -1887,6 +1886,10 @@ ecpg_into: INTO into_list	{ $$ = EMPTY; }
 	| into_descriptor		{ $$ = $1; }
 	;
 
+opt_ecpg_into:	/* EMPTY */	{ $$ = EMPTY; }
+	| ecpg_into		{ $$ = $1; }
+	;
+
 ecpg_fetch_into: ecpg_into	{ $$ = $1; }
 	| using_descriptor
 	{

src/interfaces/ecpg/preproc/ecpg.type

@@ -78,6 +78,7 @@
 %type <str> opt_bit_field
 %type <str> opt_connection_name
 %type <str> opt_database_name
+%type <str> opt_ecpg_into
 %type <str> opt_ecpg_fetch_into
 %type <str> opt_ecpg_using
 %type <str> opt_initializer

src/interfaces/ecpg/preproc/parse.pl

@@ -98,7 +98,7 @@ my %replace_line = (
 	'VariableShowStmtSHOWSESSIONAUTHORIZATION' =>
 	  'SHOW SESSION AUTHORIZATION ecpg_into',
 	'returning_clauseRETURNINGtarget_list' =>
-	  'RETURNING target_list ecpg_into',
+	  'RETURNING target_list opt_ecpg_into',
 	'ExecuteStmtEXECUTEnameexecute_param_clause' =>
 	  'EXECUTE prepared_name execute_param_clause execute_rest',
 'ExecuteStmtCREATEOptTempTABLEcreate_as_targetASEXECUTEnameexecute_param_clause'