presto-main/src/main/java/io/prestosql/metadata/QualifiedObjectName.java/QualifiedObjectName/equals
class QualifiedObjectName:    @Override
    public boolean equals(Object obj)
    {
        if (obj == this) {
            return true;
        }
        if ((obj == null) || (getClass() != obj.getClass())) {
            return false;
        }
        QualifiedObjectName o = (QualifiedObjectName) obj;
        return Objects.equals(catalogName, o.catalogName) &&
                Objects.equals(schemaName, o.schemaName) &&
                Objects.equals(objectName, o.objectName);
    }