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129

Database size is much larger than expected (x2)

? Question 2 : Why the size of db increased to 16,671,309,824, while the original images are stored in ... images. The database size should be larger than the size of the image files on the file ... >>The database size should be larger than the size of the image files on the file system, but more than 100
125

Page size - changing after database creation

Hi, I was wondering, is it safe to change page size after database is created and filled with data? Should I set page size to the same value as block size on my filesystem? lwalkowski Lukasz Walkowski The page size configuration setting should only affect new created databases, so it should be fine
73

size(collection)

Method javax.persistence.criteria.CriteriaBuilder Expression<Integer> size( Expression<C> collection ) Create an expression that tests the size of a collection. Parameters: collection - expression Returns: size expression Since: JPA 2.0
73

size(collection)

Method javax.persistence.criteria.CriteriaBuilder Expression<Integer> size( C collection ) Create an expression that tests the size of a collection. Parameters: collection - collection Returns: size expression Since: JPA 2.0
57

Database Management Settings

<database> element: <database> <size initial="256kb" resize="256kb" page="2kb" /> <recovery ... ="32mb" programs="500" /> <extensions drop="temp,tmp" /> </database> The <size> element <size initial="256kb" resize="256kb" page="2kb" /> The <size> element specifies the database file
51

Collections in JPQL and Criteria Queries

if the collection is empty and TRUE otherwise. SIZE The SIZE(collection) function returns the number of elements in a specified collection. For example: SIZE(c.languages) is evaluated to the number ... ("English", "French"); // SIZE(collection) Expression<Integer> size = cb.size(languages);
41

Is ObjectDB scalable? What are its limitations?

ObjectDB is highly scalable and can manage efficiently databases in a wide range of sizes, from a few Kilobytes to hundreds of Gigabytes and even Terabytes. ObjectDB can be used in small embedded ... supports: Database file size up to 128 TB (= 131,072 GB = 134,217,728 MB). Up to 2,147,483,648 entity
24

Bug when using SIZE in combination with date lower parameter

there seems to be a bug if I use the lower date select: SELECT j.jobId, SIZE(j.tags) FROM ParserJob j WHERE j.dateCreated < :date This returns a SIZE(j.tags) of 0 Tags, but the only existing ParserJob has 1 Tag. If I run the query: SELECT j.jobId, SIZE(j.tags) FROM ParserJob j WHERE j.dateCreated >= :date I
7

FetchPlan.FETCH_SIZE_OPTIMAL

Static Field javax.jdo.FetchPlan int FETCH_SIZE_OPTIMAL For use with setFetchSize. Value: 0. Since: JDO 2.0
7

FetchPlan.FETCH_SIZE_GREEDY

Static Field javax.jdo.FetchPlan int FETCH_SIZE_GREEDY For use with setFetchSize. Value: -1. Since: JDO 2.0

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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