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50

Database Schema Evolution

to any numeric type. In this context numeric types are: byte, short, char, int, long, float, double, Byte, Short, Character, Integer, Long, Float, Double, BigInteger, BigDecimal and enum values
50

JPA Persistable Types

: boolean, byte, short, char, int, long, float and double. Equivalent wrapper classes from package java.lang: Boolean, Byte, Short, Character, Integer, Long, Float and Double. java.math.BigInteger
40

[ODB1] Chapter 7 - JDOQL Queries

, ... double 3.14, 0d, 1e2D, -2., 5.04e+17, ... char 'x', '@', '\n', '\\', '\'', '\uFFFF', ... string ... (Byte, Short, Character, Integer, Long, Float, Double), as well as BigInteger and BigDecimal ... , double). Logical Operators Logical operators (&&, ||, !) generate complex boolean expressions
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Items in list are doubled, when the entity class is not enhanced

Dear all, I have a problem with adding items (entities) into other entity list. When the classes are not enhanced, added items are doubled. Here is an example: @Entity public class Customer ... ? Michael anaq x I've found out a new thing - items are also doubled, when the classes are enhanced
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run several embedded systems on one server, problem with double used port

we want to run several embedded systems on one server. In principle this is working but there are endless logs generated reporting about a double used port. Ist there a possibility to configure that port for each embedded system hgzwicker Hans-Georg Zwicker Are you using embedded-server mode? In
34

Double persist of Entity field with Cascade.ALL

table would have double entry of same record. Burabari Burabari Kpai For completeness, attached
31

ObjectDB Object Database Features

and double writing. Additional recovery layer - supports full transaction recording and replaying ... (boolean, byte, short, char, int, long, float, double). Wrapper types (Boolean, Byte, Short, Character, Integer, Long, Float, Double). java.lang.String Date types: java.util.Date, java.sql.Date, java.sql
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Numbers in JPQL and Criteria Queries

value and a double value is double. The ABS Function The ABS function removes the minus sign from ... of any type and always returns a double value. Criteria Query Arithmetic Expressions JPQL arithmetic ... , but all the numeric types (byte, short, int, long, float, double, BigInteger, BigDecimal) are supported. Unary
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[ODB1] Chapter 9 - ObjectDB Explorer

directory. Because this file is an executable jar, on most systems, you can double click on it to start ... " command switches the current viewer to focus on the selected object. A double click on the target element ... ). You can start editing a value field by double clicking it, by pressing F2, or, more commonly, by simply
24

Comparison in JPQL and Criteria API

, char, int, long, float, double), wrapper types (Byte, Short, Character, Integer, Long, Float, Double ... detailed above. Therefore, for example, a double value can be compared to a BigInteger instance but not

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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