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

        ElasticsearchColumn other = (ElasticsearchColumn) obj;
        return Objects.equals(this.name, other.name) &&
                Objects.equals(this.type, other.type) &&
                Objects.equals(this.jsonPath, other.jsonPath) &&
                Objects.equals(this.ordinalPosition, other.ordinalPosition);
    }