presto-raptor-legacy/src/main/java/io/prestosql/plugin/raptor/legacy/metadata/MetadataDao.java/MetadataDao/getDistribution
class MetadataDao:    @SqlQuery("SELECT distribution_id, distribution_name, column_types, bucket_count\n" +
            "FROM distributions\n" +
            "WHERE distribution_name = :distributionName")
    Distribution getDistribution(@Bind("distributionName") String distributionName);