Calculated field in a query

Mon, 02 Jun 2008 13:16:29 -0700

Hi,

To begin with I am just learning EJB and JAVA so please bear with me. I want to create a calculated field in a query from two fields in the table being queried, using SQL I would write the query like this:

SELECT ledgerdate, description, quantity, unitprice, [quantity*unitprice] FROM ledger

I have created a class called ViewLedger to contain my results, it has the following elements:

DATE ledgerdate,
STRING description,
INTEGER quantity,
BIGDECIMAL unitprice,
BIGDECIMAL amount

The query that I have been attempting that fails is:

SELECT NEW ViewLedger(l.ledgerdate, l.description, l.quantity, l.unitprice, l.quantity*l.unitprice) FROM Ledger l

The error says that there is an unexpected * in the query

The following do not work either:

SELECT NEW ViewLedger(l.ledgerdate, l.description, l.quantity, l.unitprice, (l.quantity*l.unitprice)) FROM Ledger l

The error says there is an unexpected ( in the query.

SELECT NEW ViewLedger(l.ledgerdate, l.description, l.quantity, l.unitprice, [l.quantity*l.unitprice]) FROM Ledger l

The error says there is an unexpected [ in the query.

Any help would be greatly appreciated.

Thanks.

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Calculated field in a query