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Questions tagged [oodb]

14 questions
11
votes
4 answers

Need to store LOTS of data on Android device, thinking of going OODB

I'm currently working on a project that's based on Android. Without getting into many details, the software will run on a custom built device. The hardware will never change and will always be the same. That's a definite plus :) With that said, this…
Jason L.
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4
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5 answers

Benefits of switching from SQL Server to Versant OODB

What benefits (if any) to the company (not only to developers) I could gain by switching from SQL Server 2008 to Versant OODB? More info about the project and facts to help with an answer (let me know if you need more): Very small team, almost…
Dmytrii Nagirniak
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4
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1 answer

How the existing data to be if entity structure modified or deleted on GAE?

GAE recommends using JDO/JPA. But I have serious question about using OODB like them. JDO based on user's class structure. And data structure should be modified continually as service advances. So, If data(entity) class property being removed, what…
eonil
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1 answer

How do I create a reference in my DB to a user from the ASP.NET build in usersystem?

I'm trying to save an object in my OODB, that is basically a news item (a title, some text, a poster and a postdate). I have no trouble retrieving the user object from the ASP.NET MembershipUser class. but when I try to save, it seems not all of the…
AronChan
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2 answers

hierarchical nested data structure in db4o (or any other oodb)

Really my question is, if I were to use a nested data structure in oodb would I be placing instance of classes within other instances in the db, or is there some sort of relational mapping that would be required. I've been interested in OODB (Object…
BizNuge
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2 answers

Retrieve an object in one DB4O session, store in another ('disconnected scenario')

I am trying to figure out how to keep an object useable between client sessions in DB4O. From what I understand, once a client session is closed, the object no longer resides in any cache and despite the fact that I have a valid UUID, I cannot call…
D. A. Terre
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1 answer

db4o enumset exception

I'm using db4o 8.0 with transparent activation/persistence ... I have a class which contains an EnumSet (and other things). I instantiate, add an enum value into set and store. When I search in DB, get it and trying to activate the object I get this…
ApollonDigital
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1 answer

What is the best way to schedule a task in gemstone?

My website runs on gemstone. To provide users with statistical data I need to run periodical tasks. How is this achieved best in gesmtone? From within gemstone or from the operating system? And would be topaz the right way to go?
Norbert Hartl
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0
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1 answer

How to update reference oracle

Im making two object tables, with reference M:M, insert is working correctly, but when im trying to update reference, i get the error. Error: SQL Error: ORA-00904: "A"."ATS_PN": "%s: invalid identifier" CREATE OR REPLACE TYPE STUDENTI AS OBJECT( …
pumpk1n
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How to define user-defined types (Object-Oriented Database) in SQL Server 2017?

In our Database course in university, our reference book was Fundamentals of Database Systems by Elmasri. In Chapter 12 of this book, we were introduced to Object-Oriented database systems, in which User-Defined Types (UDTs) were treated like…
Mohammadmahdi Alijani
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5 answers

why everyone wants NOSQL other than large-scale Oracle Clusters?

oracle has a good reputation for handling large-scale applications and it's also flexible to extend to cluster environment. Why everyone wants NOSQL? because nosql db is much cheaper? why not swith object-oriented db?
RobinQu
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2 answers

Using an Object Oriented Database (db4o) for a medium scale application

I came across db4o OODB database and wondering how it compares to a traditional stack with an RDBMS or an ORM like Hibernate/EclipseLink. The application is a workflow system and will expand over time. Not sure if an OODB like db4o fits well. I…
user6123723
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1 answer

PHP - Calling Object in an object

I have a class project creating an OODB with MYSQL and PHP. Currently I have table filled with the object boxs. I also have a box class which when it is constructed will pull it data from the table and then recursively construct its children in a…
user2359107
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1 answer

Make class names independent via db4o renaming api

I'm new in Db4o As far as I checked, when I do a refactoring of a class name or path (packages), db4o doesnt recognizes the class anymore and creates a new 'category'. I want to make an API, so that any class refactoring in my app won't affect the…
ApollonDigital
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