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Date: Mon, 12 Apr 2010 06:21:41 -0400 (EDT)
From: "Michael McGovern (JIRA)" <jira@apache.org>
To: dev@openjpa.apache.org
Subject: [jira] Created: (OPENJPA-1627) ORderBy with @ElementJoinColumn and
 EmbeddedId uses wrong columns in SQL
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ORderBy with @ElementJoinColumn and EmbeddedId uses wrong columns in SQL
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                 Key: OPENJPA-1627
                 URL: https://issues.apache.org/jira/browse/OPENJPA-1627
             Project: OpenJPA
          Issue Type: Bug
          Components: sql
    Affects Versions: 2.0.0-beta3
         Environment: Windows 7 32 bit / Oracle XE
            Reporter: Michael McGovern


Typical bank example, Account with Transactions. It is a legacy db so Transaction has compound key - represented by TransactionId class.

The problem is that the order by in the generated SQL is for columns mapped in the transaction entity NOT the TransacionId as expected.

So the Account class has the following fragment....

	@OneToMany(fetch = FetchType.LAZY, cascade = {CascadeType.PERSIST})
	@ElementJoinColumn(name="maccno", referencedColumnName="maccno")
	@OrderBy(value = "_id._processDate ASC, _id._tranSequenceNumber ASC")
	private LinkedList<Transaction> _transactions;


_processDate and _tranSequenceNumber are defined in the TransactionId class.

Transaction has the following fragment....

	@EmbeddedId
	private TransactionId _id;
	
	@Column(name = "mtrancde")
	private int _transactionCode;
	
	@Column(name = "mamount")
	private BigDecimal _amount;
	
	@Column(name = "mdesc")
	private String _description;
	

	@Column(name = "mactdate")
	private Date _actualDate;
	
	@Column(name = "mbranch")
	private int _branch;


And TransactionId defines the primary key columns....

@Embeddable
public class TransactionId {
	
	@Column(name = "maccno")
	private String _accountNumber;
	
	@Column(name = "mprocdate")
	private Date _processDate;
	
	@Column(name = "mtranseqno")
	private int _tranSequenceNumber;


However the generated SQL is doing order by on columns mapped in Transaction:

executing prepstmnt 23188098 SELECT t0.maccno, t0.mprocdate, t0.mtranseqno, t0.mactdate, t0.mamount, t0.mbranch, t0.mchqcash, t0.mdesc,
 t0.mtmnlno, t0.mtrancde, t0.mtrnfeed 
FROM transaction t0 
WHERE t0.maccno = ? 
ORDER BY t0.mamount ASC, t0.mbranch ASC [params=(String) 000734123]

(no idea why it chose mamount, mbranch)
The last line should be:

ORDER BY t0.mprocdate ASC, t0.mtranseqno ASC [params=(String) 000734123]

Thanks

Michael

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