diff --git a/pmodbc.c b/pmodbc.c
index fa1abbf787cc33484ce9f3d5a2271ce3b17daa44..caf0bbd9d292e9bded9f96da81306988a1d0ca44 100644
--- a/pmodbc.c
+++ b/pmodbc.c
@@ -7,6 +7,7 @@
 #include <assert.h>
 
 // compilation: gcc -g pmodbc.c -lodbc -o pmodbc
+// opt: gcc -O3 pmodbc.c -lodbc -o pmodbc
 
 static void list_drivers();
 static void query_db(char* dsn, char* query, int csv);
@@ -105,8 +106,6 @@ static void query_db(char* dsn_str, char* query, int csv) {
             puts(csvbuf);
         }
     }
-    extract_error("SQLStmt for dbc", stmt, SQL_HANDLE_STMT);
-    exit(1);
 }
 
 void extract_error(char *fn, SQLHANDLE handle, SQLSMALLINT type)