presto-spi/src/main/java/io/prestosql/spi/connector/ColumnMetadata.java/ColumnMetadata/equals
class ColumnMetadata:    @Override
    public boolean equals(Object obj)
    {
        if (this == obj) {
            return true;
        }
        if (obj == null || getClass() != obj.getClass()) {
            return false;
        }
        ColumnMetadata other = (ColumnMetadata) obj;
        return Objects.equals(this.name, other.name) &&
                Objects.equals(this.type, other.type) &&
                Objects.equals(this.nullable, other.nullable) &&
                Objects.equals(this.comment, other.comment) &&
                Objects.equals(this.extraInfo, other.extraInfo) &&
                Objects.equals(this.hidden, other.hidden);
    }