Fast Object Database for Java - with JPA/JDO support

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18

New Index causing troubles

Hello, we introduced a new index upon a String field Order.typeName, added to package.jdo as ... >
18

Temporary disabling of indexes?

When populating a large database with objects that have indexed fields takes very much longer than populating the database with those objects if the index definitions are removed. Is it possible to indicate in some way that for a particular use of the database indexes are to be ignored
18

Slow searching with two indexes

a performance problem using two indexes. An entity I'm querying has two indexed fields - one is the primary ... query: select from Thing where reference == :objectReference order by id desc when an index is defined on the reference field should use that index and avoid a full scan. Does it run fast
18

Exception upon index definition change

   index;     private String role; } @Index (members = {"refs.role", "refs.index"}) @Entity ... this is related to my ticket http://www.objectdb.com/database/support/636. I think index changes should never cause the application to stop. Even the Doctor does not run anymore using this index definition
18

Indexing a field results in internal Exception

a problem with indexing. An index on a String field is required to give good performance but if I add the @Index annotation to the field I eventually end up with an ObjectDB internal exception. This is reproducible, as is the program running to completion (slowly) if I remove the @Index annotation
18

Is there an administration tool with which I could create extra indexes?

Hello, I have composite index, and it was working fine, but now I need to add more features to the software and I need to throw more indexes in there. I wanted to know what's the best way to do this. 1. Have some admin tool CREATE INDEX..... ON a.b or 2. add more @Index to the object entities. in
18

Index Rebuilder

When a new index is added to an existing entity classes that already has instances in the database ... data. The Index Rebuilder tool will enable rebuilding indexes, synchronizing their data ... , in which such new indexes will be enabled. support Support Version 2.6.6 introduces a built in
18

Adding indexes on existing entities.

Is it safe to add indexes on an existing entity class? Thanks. lo Hoel Safe, but to enable the new index you will have to rebuild it, currently using the Doctor. Before running the Doctor make sure that the index is registered in the database by opening the database when it has access to the new
18

is JDO field attribute "indexed" supported?

seem to have specific documentation for this. Your documentation for JDO annotation @Index mentions that it corresponds to the XML <index> element which is one way to specify indexes in XML metadata. But there is another way which is to specify an indexed attribute on the field element, like
18

[ODB1] Chapter 9 - ObjectDB Explorer

the "Class" tabbed window and selecting "Rebuild Class Extent". The "Rebuild All Indexes" command starts a thread that scans the entire database and rebuilds all the indexes. This tool is useful when adding a new index (in the JDO metadata) to a class that already has persistent instances in the database

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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