presto-hive/src/main/java/io/prestosql/plugin/hive/metastore/Column.java/Column/equals
class Column:    @Override
    public boolean equals(Object o)
    {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        Column column = (Column) o;
        return Objects.equals(name, column.name) &&
                Objects.equals(type, column.type) &&
                Objects.equals(comment, column.comment);
    }