presto-raptor-legacy/src/main/java/io/prestosql/plugin/raptor/legacy/metadata/SchemaDao.java/SchemaDao/createTableBuckets
class SchemaDao:    @SqlUpdate("CREATE TABLE IF NOT EXISTS buckets (\n" +
            "  distribution_id BIGINT NOT NULL,\n" +
            "  bucket_number INT NOT NULL,\n" +
            "  node_id INT NOT NULL,\n" +
            "  PRIMARY KEY (distribution_id, bucket_number),\n" +
            "  UNIQUE (node_id, distribution_id, bucket_number),\n" +
            "  FOREIGN KEY (distribution_id) REFERENCES distributions (distribution_id),\n" +
            "  FOREIGN KEY (node_id) REFERENCES nodes (node_id)\n" +
            ")")
    void createTableBuckets();