From 3d7a1e2b96b60353c63742d4a8270c67a17744f4 Mon Sep 17 00:00:00 2001
From: Michael Meskes <meskes@postgresql.org>
Date: Mon, 14 Aug 2017 11:29:34 +0200
Subject: [PATCH] Changed ecpg parser to allow RETURNING clauses without
 attached C variables.

---
 src/interfaces/ecpg/preproc/ecpg.trailer | 7 +++++--
 src/interfaces/ecpg/preproc/ecpg.type    | 1 +
 src/interfaces/ecpg/preproc/parse.pl     | 2 +-
 3 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/interfaces/ecpg/preproc/ecpg.trailer b/src/interfaces/ecpg/preproc/ecpg.trailer
index 1c108795de..d273070dab 100644
--- a/src/interfaces/ecpg/preproc/ecpg.trailer
+++ b/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
 	{
diff --git a/src/interfaces/ecpg/preproc/ecpg.type b/src/interfaces/ecpg/preproc/ecpg.type
index ac6aa000ac..9497b91b9d 100644
--- a/src/interfaces/ecpg/preproc/ecpg.type
+++ b/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
diff --git a/src/interfaces/ecpg/preproc/parse.pl b/src/interfaces/ecpg/preproc/parse.pl
index f132ad7fc3..6dd55fcfe4 100644
--- a/src/interfaces/ecpg/preproc/parse.pl
+++ b/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'
-- 
2.40.0