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collection of embedded objects

used to save space and improve performance. In many cases queries will run faster when using embedded

drop a column from table

Hi, I want to drop one column from my database table suppose i have 3 column (id, name, address) now i want to drop address. then what will be the query or procedure.. Bimal Bimal kumar dalei Just remove the field from the entity class. See Automatic Schema Evolution. Space in the database file

Problems with Tutorials » JPA Web App (Tomcat) » NetBeans JPA Web App

, and thank you in advance, Alan alacalcas Alan Alan, Wow so i just spaced out on my previous post. I

Logging problem on attempt to start a Server that is already running

It seems that there is a bug in logging mechanism, if you try to start the database which is already started it starts filing the log continuously until it runs out of space on disk. How to check is the database runing from command promt. regards. peric.emil Emil Perić This is caused by

Searching lists within objects

one (this could also save space in the database). Split the query - first find the relevant attributes

config optimizing

"> <quota directories="5" files="20" disk-space="5mb" /> </dir> </user> <user username="user1" password

Iterating over large result set

Hi, Few days ago I was writing some code to iterate over quite a large dataset. Fitting those data in memory was quite a challenge even with 3GB heap space. So I did paging using two loops. for (int page=0; page < resultCount; page+=pageSize) {     Query q = em.createQuery("query

100% CPU when using multiple BETWEEN

so on DB with 2800 records) throws a "java.lang.OutOfMemoryError: Java heap space" exception. Emil

possible index required for improving query performance

the class again with ObjectDB. Running the Doctor will reclaim the space that the index takes

Unexpected error when loading all entity instance

again. The database file is corrupt. I checked the HDD for errors but there are none. The disk space

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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