diff --git a/statement.c b/statement.c
index f45cd79..0df55d4 100644
--- a/statement.c
+++ b/statement.c
@@ -296,7 +296,10 @@ PGAPI_FreeStmt(HSTMT hstmt,
 		if (stmt->execute_parent)
 			stmt->execute_parent->execute_delegate = NULL;
 		/* Destroy the statement and free any results, cursors, etc. */
-		SC_Destructor(stmt);
+		//SC_Destructor(stmt);
+		/*if the connection was give up,return SQL_ERROR.*/
+		if(SC_Destructor(stmt) == FALSE)
+			return SQL_ERROR;
 	}
 	else if (fOption == SQL_UNBIND)
 		SC_unbind_cols(stmt);
@@ -477,6 +480,7 @@ SC_Constructor(ConnectionClass *conn)
 char
 SC_Destructor(StatementClass *self)
 {
+	char cRet = TRUE;
 	CSTR func	= "SC_Destructor";
 	QResultClass	*res = SC_get_Result(self);
 
@@ -498,6 +502,12 @@ SC_Destructor(StatementClass *self)
 
 	SC_initialize_stmts(self, TRUE);
 
+	if(self->hdbc && !self->hdbc->pqconn)
+	{
+		SC_set_error(self, STMT_COMMUNICATION_ERROR, "connection error.", func);
+		cRet = FALSE;
+	}
+
         /* Free the parsed table information */
 	SC_initialize_cols_info(self, FALSE, TRUE);
 
@@ -525,7 +535,7 @@ SC_Destructor(StatementClass *self)
 
 	MYLOG(0, "leaving\n");
 
-	return TRUE;
+	return cRet;
 }
 
 void
@@ -2304,7 +2314,6 @@ MYLOG(DETAIL_LOG_LEVEL, "!!SC_fetch return =%d\n", ret);
 		{
 			char			fetch[128];
 			QResultClass 	*last = NULL, *res;
-			BOOL			refcursor_found = FALSE;
 
 			/* Iterate the columns in the result to look for refcursors */
 			numcols = QR_NumResultCols(rhold.first);
@@ -2319,12 +2328,7 @@ MYLOG(DETAIL_LOG_LEVEL, "!!SC_fetch return =%d\n", ret);
 						break;
 					}
 
-					refcursor_found = TRUE;
 					STR_TO_NAME(self->cursor_name, QR_get_value_backend_text(rhold.first, 0, i));
-					/* Skip NULL refcursors (allows procedure to return a variable number of results) */
-					if (!SC_cursor_is_valid(self))
-						continue;
-
 					SC_set_fetchcursor(self);
 					qi.result_in = NULL;
 					qi.cursor = SC_cursor_name(self);
@@ -2345,23 +2349,19 @@ MYLOG(DETAIL_LOG_LEVEL, "!!SC_fetch return =%d\n", ret);
 							QR_concat(last, res);
 							self->multi_statement = TRUE;
 						}
-						last = res;
 						if (!QR_command_maybe_successful(res))
 						{
 							SC_set_errorinfo(self, res, 0);
+							QR_Destructor(rhold.first);
 							break;
 						}
+
+						last = res;
 					}
 				}
 			}
-			if (refcursor_found)
-			{
-				/* Discard original result */
-				if (NULL == last)
-					SC_set_Result(self, QR_Constructor());	/* return empty result */
-				else
-					QR_Destructor(rhold.first);
-			}
+			if (last)
+				QR_Destructor(rhold.first);
 		}
 	}
 cleanup: