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29

ObjectDB current status of the BIRT plugin

ObjectDB current status of the BIRT plugin
29

_UserException: Attempt to open a database file '...' that is currently in use

_UserException: Attempt to open a database file '...' that is currently in use
7

Literals in JPQL and Criteria Queries

), a feature that is not currently supported by all JPA implementations. String Literals JPQL follows ... '} Timestamp - {ts 'yyyy-mm-dd hh:mm:ss'} - for example: {ts '2020-01-03 13:59:59'} Enum Literals JPA 2 adds ... <java.sql.Timestamp> now = cb.literal(new java.sql.Timestamp()); // Enum literal: Expression
5

FROM clause (JPQL / Criteria API)

, CHARACTER_LENGTH, CLASS, COALESCE, CONCAT, COUNT, CURRENT_DATE, CURRENT_TIME, CURRENT_TIMESTAMP
4

ObjectDB Object Database Features

.util.Date, java.sql.Date, java.sql.Time and java.sql.Timestamp. Math types: java.lang.BigInteger ... .Timestamp. Math: java.lang.BigInteger and java.lang.BigDecimal. Auto Value Generation Modes
3

Index Definition

, java.sql.Date, java.sql.Time, java.sql.Timestamp. Any enum type. Reference to an entity object
3

JPA Primary Key

. java.lang.String. java.util.Date, java.sql.Date, java.sql.Time, java.sql.Timestamp. Any enum type
3

javax.persistence.criteria.CriteriaBuilder

2.0 Expression<Timestamp> currentTimestamp() Create expression to return current timestamp. Create expression to return current timestamp. Returns: expression for current timestamp Since: JPA 2.0 ... () Create expression to return current date. Create expression to return current date. Returns
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currentTimestamp()

Method javax.persistence.criteria.CriteriaBuilder Expression<Timestamp> currentTimestamp() Create expression to return current timestamp. Returns: expression for current timestamp Since: JPA 2.0
2

Database Explorer

it from the command line as follows: > java -jar explorer.jar If explorer.jar is not in the current ... to close a currently open database connection. Viewing Database Content Viewer Windows The Explorer ... ] tabbed window or an object in a currently open Table or Tree window). You can open a new viewer

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.

Need Help?

  1. Search ObjectDB website
  2. Read the FAQ
  3. Follow the Tutorials
  4. View or post in the forum
  5. Search or file an issue
  6. Contact support