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From "Andrus Adamchik (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CAY-1746) Two InsertBatchQueries generated for a single DbEntity insert when this DbEntity has a flattened attribute and a flattened relationship
Date Tue, 09 Oct 2012 18:36:03 GMT
Andrus Adamchik created CAY-1746:
------------------------------------

             Summary: Two InsertBatchQueries generated for a single DbEntity insert when this
DbEntity has a flattened attribute and a flattened relationship 
                 Key: CAY-1746
                 URL: https://issues.apache.org/jira/browse/CAY-1746
             Project: Cayenne
          Issue Type: Bug
          Components: Core Library
    Affects Versions: 3.1B1
            Reporter: Andrus Adamchik


This often happens when vertical inheritance is in use:

T1: ID (PK)
T2: ID (dependent PK), T3_ID, T2_COL 
T3: ID (PK)

abstract class O1 // maps to T1

class O2 extends O1 // maps to T1
   O3 o3; // maps to 't2.t3'
   Object t2Col; maps to T2_COL

class O3 // maps to T3   

Saving O2 together with related O3 results in 2 InsertNatchQuery instances generated for T2.
One originating from DataDomainFlattenedBucket and containing propagated PK and FK, another
- from DataDomainInsertBucket and containing T2_COL changes. 

Depending on their (random from what I can tell), a different error would occur. Either a
NULL for PK/FK, or duplicate PK. E.g. see the attached example (a reworked version of CAY-1744
with the hack to disable read-only rels). It generates the following inserts and the following
error:

INFO: INSERT INTO "session" ("id", "type") VALUES (?, ?)
Oct 9, 2012 9:26:02 PM org.apache.cayenne.log.CommonsJdbcEventLogger logQueryParameters
INFO: [batch bind: 1->id:200, 2->type:'c']
Oct 9, 2012 9:26:02 PM org.apache.cayenne.log.CommonsJdbcEventLogger logUpdateCount
INFO: === updated 1 row.
Oct 9, 2012 9:26:02 PM org.apache.cayenne.log.CommonsJdbcEventLogger logQuery
INFO: INSERT INTO "device" ("id") VALUES (?)
Oct 9, 2012 9:26:02 PM org.apache.cayenne.log.CommonsJdbcEventLogger logQueryParameters
INFO: [batch bind: 1->id:200]
Oct 9, 2012 9:26:02 PM org.apache.cayenne.log.CommonsJdbcEventLogger logUpdateCount
INFO: === updated 1 row.
Oct 9, 2012 9:26:02 PM org.apache.cayenne.log.CommonsJdbcEventLogger logQuery
INFO: INSERT INTO "client_session" ("device_id", "id", "ip") VALUES (?, ?, ?)
Oct 9, 2012 9:26:02 PM org.apache.cayenne.log.CommonsJdbcEventLogger logQueryParameters
INFO: [batch bind: 1->device_id:NULL, 2->id:200, 3->ip:NULL]
Oct 9, 2012 9:26:02 PM org.apache.cayenne.log.CommonsJdbcEventLogger logUpdateCount
INFO: === updated 1 row.
Oct 9, 2012 9:26:02 PM org.apache.cayenne.log.CommonsJdbcEventLogger logQuery
INFO: INSERT INTO "client_session" ("device_id", "id", "ip") VALUES (?, ?, ?)
Oct 9, 2012 9:26:02 PM org.apache.cayenne.log.CommonsJdbcEventLogger logQueryParameters
INFO: [batch bind: 1->device_id:200, 2->id:200, 3->ip:NULL]
Oct 9, 2012 9:26:02 PM org.apache.cayenne.log.CommonsJdbcEventLogger logQueryError
INFO: *** error.
java.sql.SQLIntegrityConstraintViolationException: The statement was aborted because it would
have caused a duplicate key value in a unique or primary key constraint or unique index identified
by 'SQL121009212602580' defined on 'client_session'.
	at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown Source)

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