Fast Object Database for Java - with JPA/JDO support

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javax.jdo.annotations.Discriminator

: "" Since: JDO 2.1 String indexed Whether the discriminator is indexed. Whether the discriminator is indexed. Returns: whether the discriminator is indexed Default value: "" Since: JDO 2.1
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javax.jdo.annotations.Version

: the vendor extensions Default value: {} Since: JDO 2.1 String indexed Whether the version column(s) is(are) indexed. Whether the version column(s) is(are) indexed. Returns: whether the version column(s) is(are) indexed Default value: "" Since: JDO 2.1 VersionStrategy strategy Strategy
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Queries are slow on a large database

needs 4 to 5 minutes to return a result. I have been adviced to use indexes ... :     
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Performance issues on aggregate query

; public Date associatedFileLastModification; @Index public String classIdentifier; public Date created ... ; @Index public String fileURL; @Index public String foreignUuid; @Index public String identCode; public String internalReference; // EUR-0004 public Boolean inSlots = true; @Index public Date
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What role is the JDO in ObjectDB?

in JPA that the @Index can not be used. These is an example in ObjectDB which used @Index, I traced it to the JDO lib. So if I want to make a index without SQL on database, then @Index is a mandatory function. Any suggestion on @Index? gzdillon Lai Yang You are right - setting indexes is currently
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Exception after update of indices of Entity class

Hello, I changed the index definition of an entity class from @Index()... to @Indices() and now I ... it is not the most recent build. Could you please try opening the database after the index change ... . Changing from @Index()... to @Indices() should not change anything if it is only annotation change
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javax.jdo.annotations.Indices

javax.jdo.annotations Annotation Indices Target: Classes Annotation for a group of index constraints. Since: JDO 2.1 Index[] value The indices The indices Returns: The indices Since: JDO 2.1
3

javax.jdo.Query

-based inclusive start index toExcl - 0-based exclusive end index, or Long.MAX_VALUE for no limit
3

setRange(fromIncl, toExcl)

is done at the data store. Parameters: fromIncl - 0-based inclusive start index toExcl - 0-based exclusive end index, or Long.MAX_VALUE for no limit. Since: JDO 2.0
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each 1-2 days objects on some objectdb level lock/block each other

" /> <index-update enabled="true" priority ... using additional indexes, to prevent the need for repeating requests. support Support It also makes ... ) but with the heavy running threads, which run massive queries against the data rather than against the indexes

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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