def __init__(self, con, query_templates, schema, table, name, dtype, keys_per_column):
        self._con = con
        self._query_templates = query_templates
        self.schema = schema
        self.table = table
        self.name = name
        self.type = dtype
        self.keys_per_column = keys_per_column

        self.foreign_keys = []
        self.ref_keys = []