db/drivers/mysql: print debug info for setting MySQL ANSI SQL mode (#…

…3638)

* Free DB SQL string

* Release DB connection

db/drivers/mysql/db.c

@@ -23,6 +23,7 @@ int db__driver_open_database(dbHandle *handle)
     const char *name;
     dbConnection default_connection;
     MYSQL *res;
+    dbString sql;
 
     db_get_connection(&default_connection);
     name = db_get_handle_dbname(handle);
@@ -63,14 +64,25 @@ int db__driver_open_database(dbHandle *handle)
             db_d_report_error();
             return DB_FAILED;
         }
+
+        db_init_string(&sql);
+        db_set_string(&sql, "SET SQL_MODE=ANSI_QUOTES;");
+
         /* Set SQL ANSI_QUOTES MODE which allow to use double quotes instead of
          * backticks */
-        if (mysql_query(connection, "SET SQL_MODE=ANSI_QUOTES") != 0) {
+        if (mysql_query(connection, db_get_string(&sql)) != 0) {
             db_d_append_error("%s %s", _("Unable to set SQL ANSI_QUOTES mode:"),
                               mysql_error(connection));
             db_d_report_error();
+            db_free_string(&sql);
+            mysql_close(connection);
+
             return DB_FAILED;
         }
+        G_debug(3, "db__driver_open_database(): Set ODBC MySQL DB %s",
+                db_get_string(&sql));
+
+        db_free_string(&sql);
     }
 
     return DB_OK;