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from superset.db_engine_specs.postgres import PostgresBaseEngineSpec


class RedshiftEngineSpec(PostgresBaseEngineSpec):
    engine = "redshift"
    engine_name = "Amazon Redshift"
    max_column_name_length = 127

    @staticmethod
    def _mutate_label(label: str) -> str:
        """
        Redshift only supports lowercase column names and aliases.

        :param label: Expected expression label
        :return: Conditionally mutated label
        """
        return label.lower()