ObjectDB Database Search

In this final step we will add a simple table to the report: Open the [Insert Table ] dialog box by dragging a Table  from the [Palette] window and dropping it on the report design (.rptdesign ... ) in the third field and click OK . Fill the table with data by dragging the x and y columns from

Windows The Explorer provides two types of viewer windows for viewing the database data. The Table window follows the approach of traditional visual database tools. Every row in the table represents ... , a bookmark in the [Database] tabbed window or an object in a currently open Table or Tree window

Besides the em.remove() one by one, is there a function of "drop table " or "delete from table ... () cause exceptions. Yes, you'd better to put it into manual, since "drop table " is often in debugging. I can not find "drop table " in this site BTW. gzdillon Lai Yang The code “createQuery("DELETE FROM

. Therefore, this strategy does not guarantee there will be no gaps in sequence values. The Table Strategy The TABLE strategy is very similar to the SEQUENCE strategy: @Entity @TableGenerator ( name ="tab ... = GenerationType . TABLE , generator ="tab") @Id long id; } ORM-based JPA providers (such as Hibernate

JPA Annotation Table Target: TYPE Implemented Interfaces: Annotation Specifies the primary table mapped by the annotated entity type. Additional tables may be specified using SecondaryTable or SecondaryTables annotation. If no Table annotation is specified for an entity class, the default values

Hi: After a table built by real data, how to alter table structure, such as: alter table add column ... alter table add index ... TIA gzdillon Lai Yang There are no tables is ObjectDB. Anyway,  alter table add column ... This is automatic - just change your class (see Database Schema

JPA Annotation Attribute in jakarta.persistence.MapKeyJoinColumn String table default "" (Optional) The name of the table that contains the foreign key column. If the join is for a map key for an element collection, the foreign key column is in the collection table for the map value. If the join

JPA Annotation Attribute in jakarta.persistence.JoinColumn String table default "" (Optional) The name of the table that contains the column. If a table is not specified, the column is assumed to be in the primary table of the applicable entity. Default: If the join is for a OneToOne or ManyToOne

want  join tow table and generate a third table . Ex:   table 1: employee     table 2: address  and the generate table will be table 3: emp_add employee: e_id, e_name address: add_id, city, house_no; the third table will be like. emp_add: e_id, add_id i am using annotation like

hi, I want to create only a table without insertions of data. And also table contains constraints like not_null, unique, primary key etc. Ex: (In sql) create table emp (id int(5) primary key, name varchar2(20)); , so it will create only table . when we want to see the table structure

JPA Annotation Attribute in jakarta.persistence.MapKeyColumn String table default "" (Optional) The name of the table that contains the column. Defaults: If the map key is for an element collection, the name of the collection table for the map value. If the map key is for a OneToMany or ManyToMany

have Relation tables     TransportationEvent  and Conclusion  , relations like @Entity ... = new ArrayList (); .... } here in database i have got another two table like Conclusion ... need to delete  records in both tables (TransportationEvent and Conclusion) here i am trying

Hi Is there anyway to get the table view , rather than the tree view, when I'm running queries ... Newman You can run a query in the Explorer also by selecting [Window Open Table Window] from the menu (or clicking the table icon in the toolbar) when the query window is active, and then the results

Hi , I have 3 questions for objectdb : 1-) How can i preload all table rows into memory in objectdb ? So i can query fast. I have seen @Cacheable annotation. But i need warmup table to memory when my software boots up.   2-) Also for speed up I am inserting a message into table

JPA Enum Constant in jakarta.persistence.InheritanceType TABLE _PER_CLASS A table for each concrete entity class. Each concrete class in the hierarchy has its own table , and each entity instance is stored as a single table row. No discriminator column is necessary. Since: JPA 1.0

Hello , I've relational db , and there is some table named enumerations with , some key and values ... application configs. Like; tablename : enumeration table rows: key       ... ? Like this: @Entity @ Table (name="enumerations") public class Enumerations { //Field binding possible

Hello, I would like to know if it's possible to copy the content of a table representing one class of object to another table whithout having to use java object (no object instantiation) ? In fact ... a table before erasing the content. Thanks. Linuski christophe LASKAWIEC You will have to write code

JPA Annotation Attribute in jakarta.persistence. Table Index [] indexes default {} (Optional) Indexes for the table . These are only used if table generation is in effect. Note that it is not necessary to specify an index for a primary key, as the primary key index is created automatically. Since: JPA 2.1

JPA Annotation Attribute in jakarta.persistence. Table UniqueConstraint [] uniqueConstraints default {} (Optional) Unique constraints to be placed on the table . These are only used if table generation is in effect. These constraints apply in addition to any constraints specified by the Column

JPA Annotation Attribute in jakarta.persistence. Table CheckConstraint [] check default {} (Optional) Check constraints to be applied to the table . These are only used if table generation is in effect. Since: JPA 3.2

JPA Annotation Attribute in jakarta.persistence. Table String options default "" (Optional) A SQL fragment appended to the generated DDL statement which creates this table . This is only used if table generation is in effect. Since: JPA 3.2

JPA Annotation Attribute in jakarta.persistence. Table String comment default "" (Optional) A comment to be applied to the table . This is only used if table generation is in effect. Since: JPA 3.2

JPA Annotation Attribute in jakarta.persistence.Column String table default "" (Optional) The name of the table that contains the column. If absent the column is assumed to be in the primary table . Since: JPA 1.0

JPA Enum Constant in jakarta.persistence.InheritanceType SINGLE_ TABLE A single table for each entity class hierarchy. Subclasses are stored together with the root class, and each entity instance is stored as a single table row. The concrete subclass represented by a row is determined by the value held by a plain. Since: JPA 1.0

JPA Annotation Attribute in jakarta.persistence. Table String schema default "" (Optional) The schema of the table . Defaults to the default schema for user. Since: JPA 1.0

JPA Annotation Attribute in jakarta.persistence.TableGenerator String table default "" (Optional) Name of the table that stores the generated id values. Defaults to a name chosen by persistence provider. Since: JPA 1.0

JPA Annotation Attribute in jakarta.persistence. Table String catalog default "" (Optional) The catalog of the table . Defaults to the default catalog. Since: JPA 1.0

JPA Annotation Attribute in jakarta.persistence. Table String name default "" (Optional) The name of the table . Defaults to the entity name. Since: JPA 1.0

JPA Enum Constant in jakarta.persistence.GenerationType TABLE Indicates that the persistence provider must assign primary keys for the entity using an underlying database table to ensure uniqueness. May be used to generate primary keys of type Long, Integer, long , or int . Since: JPA 1.0

Please I have being working on an application, and I am experiencing some challenges populating my javaFx table from ObjectDB, Please I don't know if I can get a sample code for populating javaFx table from ObjectDB that could aid my Project. Jerry Onoja Jerry You may check the following links

when trying to execute in explorer (max heap size 1GByte) delete from LogEntry l it comes up with a Java heap error after 20 minutes of executing. How to empty such a table ?     hgzwicker Hans-Georg Zwicker This may be because the transaction size is limited by the heap size

Hi, Can we create 128 column of table ? am getting following error. java.lang.ArrayIndexOutOfBoundsException: -128 at com.objectdb.o.ALS.g(ALS.java:135) at com.objectdb.o.ANT.G(ANT.java:594) at com.objectdb.o.ANT.x(ANT.java:526) at com.objectdb.o.SCM.o(SCM.java:175) at com.objectdb.o.TYS.d(TYS.java

of logical operators, as shown in the following table : Set 1 - JPQL / SQL Set 2 - Java / JDO AND && OR ... must be one of: TRUE, FALSE , and NULL . The following table shows how the AND operator is evaluated based ... must be one of: TRUE, FALSE , and NULL . The following table shows how the OR operator is evaluated

ObjectDB supports two sets of comparison operators, as shown in the following table :   Set 1 ... by these operators. Comparing NULL values The following table shows how NULL values are handled by ... are always evaluated to TRUE , FALSE or NULL . When both operands are not NULL (not shown in the table ) the operator

is that SQL works with relational database tables , records and fields, whereas JPQL works with Java ... rather than just field values from database tables , as with SQL. That makes JPQL more object oriented friendly

) is that in JPA data is represented by classes and objects rather than by tables and records as in ... representation in the relational database (as tables and records) and the representation in the Java application

requires slow conversions between graphs of Java objects and flat database table rows. Object Relational ... or NetBeans . Forget relational databases, JDBC, drivers, tables , records, ORM tools and mapping

that ability and require multiple tables , multiple records and join operations in order to support

objects (and graphs of objects) in an ObjectDB database directly. There's no need to define tables

the mapping of an association to an intermediate join table . It is applied to the owning side of an association. A join table is typically used in the mapping of many-to-many and unidirectional one-to-many ... and unidirectional). When a join table is used in mapping a relationship with an embeddable class on the owning

to the column. These are only used if table generation is in effect. Since: JPA 3.2 String columnDefinition ... to be applied to the column. This is only used if table generation is in effect. Since: JPA 3.2 ... the generation of a foreign key constraint when table generation is in effect. If this element is not

a secondary table for the annotated entity class. Specifying one or more secondary tables indicates that the data for the entity class is stored across multiple tables . If no SecondaryTable annotation ... table . If no primary key join columns are specified, the join columns are assumed to reference

a mapping to an entity that is a map key. The map key join column is in the collection table , join table , or table of the target entity that is used to represent the map. If no MapKeyJoinColumn ... key constraint when table generation is in effect. If this element is not specified, a default

This shows pressing an Entity and pressing Table view freezes the program, this is a remote DB not ... , but if yo just open table view like in the video it's slow/freezes.   Trianglehead Json Error ... Error It seems challenging to repeat this issue: the table is opened quickly in both embedded mode

If I open a class in the explorer via the "Open Table Window" button, select a row by its index and prex "Del" or use right click "Delete" the last entry of the table is removed and not the selected ... you for your report but unfortunately we cannot reproduce it (e.g. deleting the first row in a table

So I am able to do queries with tree view, but with table view it just shows null.  Also if I select a table with the mouse and press either tree or table view it's extremely laggy.   Trianglehead Json Error We may need more information to investigate this issue. It would help, of course

reading from table gives Unexpected exception [ObjectDB 2.6.3] Unexpected exception (Error 990)   Generated by Java HotSpot(TM) 64-Bit Server VM 1.8.0_131 (on Windows 10 10.0). Please report this error on http://www.objectdb.com/database/issue/new com.objectdb.o.InternalException: null com

), (12, 12), ..., (20, 20) The data will be presented in the BIRT report using a chart and a table :

to see the chart with the real data: In the next step we will add a table view of the same data to the report.

clicking the OK button. In the next steps we will use this data set to build a chart and a table .