sql_gen.py: RowExcIgnore.to_str(): Compare self.row_var to global const row_var using == to allow caller to provide a copy of row_var with the underlying table set appropriately
sql_gen.py: RowExcIgnore.to_str(): Compare self.row_var to global const row_var using == to allow caller to provide a copy of row_var with the underlying table set appropriately