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17

UPDATE query cannot set a new field after schema change

UPDATE query cannot set a new field after schema change
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Chapter 6 - Configuration

The ObjectDB configuration file contains one <objectdb> root element with seven subelements: <objectdb> <general> ... </general> <database> ... </database> <entities> ... </entities> <schema> ... </schema> <server> ... </server> <users> ... </users> <ssl> ... </ssl
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Database Explorer

objects. The [Schema] window shows the user defined persistable types (entity and embeddable classes) in ... an element for viewing (an entity class in the [Schema] tabbed window, a bookmark in the [Database
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Database Management Settings

for recurring queries with different arguments and are not affected by most database updates (except schema
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javax.persistence.Table

@Table(name="CUST", schema="RECORDS") public class Customer { ... } Since: JPA 1.0 String ... ) The name of the table. Defaults to the entity name. Default value: "" Since: JPA 1.0 String schema (Optional) The schema of the table. (Optional) The schema of the table. Defaults to the default
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javax.persistence.TableGenerator

: "" Since: JPA 1.0 String schema (Optional) The schema of the table. (Optional) The schema of the table. Defaults to the default schema for user. Default value: "" Since: JPA 1.0 String table (Optional) Name
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javax.persistence.JoinTable

an underscore. Default value: "" Since: JPA 1.0 String schema (Optional) The schema of the table. (Optional) The schema of the table. Defaults to the default schema for user. Default value: "" Since: JPA 1.0
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javax.persistence.SecondaryTable

the primary table. Default value: {} Since: JPA 1.0 String schema (Optional) The schema of the table. (Optional) The schema of the table. Defaults to the default schema for user. Default value: "" Since: JPA
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[ODB1] Chapter 9 - ObjectDB Explorer

, otherwise the load operation will fail. A change to the class schema (for instance, a new persistent field added ... with the new schema in the database. To see the change in the Explorer earlier, reload the class using
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javax.jdo.Constants

String JDOCONFIG_XSD_NS The standard JDO configuration schema namespace. The standard JDO configuration schema namespace. Constant value is http://java.sun.com/xml/ns/jdo/jdoconfig. Since: JDO 2.1 String JDOCONFIG_XSD_RESOURCE The name of the resource for the XML schema of the standard JDO

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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