About relation

issue

InternalException

  Bug Version: 2.4.2 Priority: Normal Status: Closed Replies: 5 Type:  Bug ...

 
forum_thread

how explorer queries work

i'm curious as to how the explorer is able to execute queries when its obviously not aware of the object model that i built. the reason is because i have an application where i want to be able to execute somewhat generalized queries and i won't know what classes are in the object model ahead of time. this is especially curious to me in client-server mode since the .jar with the object model classes is on the server side, not the client side where explorer is running. #1 2012-05-02 16:09 i'm curious as to how the explorer is able to execute queries when its obviously not aware of the object mode ...

 
forum_thread

Join query problem with new statetment

Hi, I'm trying to implement some reporting logic in my application and got nasty exception when using query with join. The query code is: #1 2011-07-04 19:40 Hi, I'm trying to implement some reporting logic in my application and got nasty exception when using ...

 
forum_thread

Distinct Error

Hi, I'm getting a NullPointerException thrown on using DISTINCT. The query works fine if I don't have distinct. However thats NOT a solution as the code generating the query is used for other queries, and some of them do need the distinct. Its only a simple query: QUERY: SELECT DISTINCT $1 FROM CDI $1 JOIN $1.attributeList $2 WHERE ($2.name='firstname') AND ($2.valueAsString='Alex') #1 2011-07-21 01:32 Hi, I'm getting a NullPointerException thrown on using DISTINCT. The query works fine if I don't ...

 
forum_thread

find repeated records by JPQL

Hi, I know a single command in MySQL can find repeated records: Select * from TTT t where id in (select id from TTT s group id having count(id)>1) I dont know how to do this using JPQL, but I use query from 430,000 records and put them into hashmap, finally it cost one hour and failed: ... with 480,026 records.(#3) Then you doubt the relation between #1 and #3 !!!!!!   Institute ...

 
forum_thread

Drop the entire database, Change the schema

I am trying to port and example app to ObjectDb. As part of the tests I drop the database and reload it with the new schema automatically between test cycles. Is there a simple way to do this with ObjectDb, or is the only way to delete the database file everytime? Thanks #1 2011-08-24 12:19 I am trying to port and example app to ObjectDb. As part of the tests I drop the database and reload it with the ...

 
forum_thread

Adding EntityListener Throws Unexpected Internal Exception

I tried adding EntityListener for a entity class and an exception was thrown. I followed similar as mentioned on the documentation but no luck. My entity class looks like below: #1 2014-10-20 17:46 I tried adding EntityListener for a entity class and an exception was thrown. I followed similar as mentioned on ...

 
forum_thread

Failed to read DB file while online backup is running

Hi, it happened already few times (seemingly randomly), that some db operation (read and also write) failed with an exception during an online backup of the same DB file was running and was close to finish its task. The version of ObjectDB I am running is 2.6.1.b02 Any idea what is causing this and how to avoid it ?   Stacktrace 1: #1 2015-06-10 12:48 Hi, it happened already few times (seemingly randomly), that some db operation (read and also write) fail ...

 
issue

Bulk load of eager mapped by (inverse) relationships

When a collection of objects is retrieved by ObjectDB (e.g. by a query) ordinary referenced objects and collection of objects that have to be loaded eagerly are loaded in bulk for better performance. However, inverse (mapped by) references that have to be loaded eagerly currently do not participate in a bulk load, which means that every reference requires running a separate query and doing a separate client-server round trip. Future versions of ObjectDB should load eager mapped by (inverse) fields in bulk as well. Feature Request Version: 2.0.0 Priority: Normal Status: Fixed Replies: 1 Type:  Feature Request ...

 
issue

[ObjectDB 2.6.9] Unexpected exception (Error 990)

[2017-03-29 14:04:44 #1 client] [ObjectDB 2.6.9] Unexpected exception (Error 990)   Generated by Java HotSpot(TM) 64-Bit Server VM 1.8.0_121 (on Windows 8.1 6.3). Please report this error on http://www.objectdb.com/database/issue/new com.objectdb.o.InternalException: null com.objectdb.o.InternalException at com.objectdb.o.BYR.o(BYR.java:113) at com.objectdb.o.BYR.w(BYR.java:206) at com.objectdb.o.VUT.j(VUT.java:350) at com.objectdb.o.RST.C(RST.java:194) at com.objectdb.o.RTT.l(RTT.java:134)... object count: 142351618 (actual 142351616) Page Relation Errors -------------------- [1] Page #36099460 unexpected exception: ...