hi andrew,
i am not totally clear about that, but afaik you may not use that date() function in your expression. cayenne will put the right string of a date object to your query, if you pass a date as a parameter.
take a look at named parameter expressions: http://cayenne.apache.org/doc20/building-expressions.html
@andrus: on http://cayenne.apache.org/doc20/expressions.html there is still a broken link to BNF expression language!
-----Ursprüngliche Nachricht-----
Von: Andrew Willerding [mailto:awillerdin..allistacti.com]
Gesendet: Montag, 23. Juli 2007 20:45
An: use..ayenne.apache.org
Betreff: Expressions with date function
I'm trying to execute the following equivalent sql expression with
cayenne V2.0.3
select * from appointments where status < 2 and group_id = 2 and
date(dt_appointment) = '20070724'
where the intent is to select all appointments where the date matches
the provided date string. The underlying database is MySQL and the
expression above provides the correct results when directly executed.
The corresponding Appointments object contains columns named groupId
(integer), status (integer) and dtAppointment (datetime)
This is what I've coded...
Date item = Calendar.getTime();
String anExp = "groupId = " + identity +
" and status < 2" +
" and date(dtAppointment) = '" +
new
SimpleDateFormat("yyyyMMdd").format(item.getTime()) + "'";
Expression exp = Expression.fromString(anExp);
SelectQuery qAppointments = new SelectQuery(Appointments.class, exp);
List appointments = dc.performQuery(qAppointments, true);
However I am getting the following error...
Exception in thread "Thread-55"
org.apache.cayenne.exp.ExpressionException: [v.2.0.2 January 14 2007]
[v.2.0.2 January 14 2007] And: invalid child - ObjPath
at org.apache.cayenne.exp.Expression.fromString(Expression.java:203)
at
com.Callista.CallResponse.Reminder.FileServerThread.parseAndImportFileData(FileServerThread.java:261)
at
com.Callista.CallResponse.Reminder.FileServerThread.run(FileServerThread.java:128)
Caused by: org.apache.cayenne.exp.ExpressionException: [v.2.0.2 January
14 2007] And: invalid child - ObjPath
at
org.apache.cayenne.exp.parser.AggregateConditionNode.jjtAddChild(AggregateConditionNode.java:89)
at
org.apache.cayenne.exp.parser.JJTExpressionParserState.closeNodeScope(JJTExpressionParserState.java:113)
at
org.apache.cayenne.exp.parser.ExpressionParser.andCondition(ExpressionParser.java:129)
at
org.apache.cayenne.exp.parser.ExpressionParser.orCondition(ExpressionParser.java:56)
at
org.apache.cayenne.exp.parser.ExpressionParser.expression(ExpressionParser.java:49)
at org.apache.cayenne.exp.Expression.fromString(Expression.java:196)
... 2 more
What am I doing wrong in my expression builder?
Thanks,
Andrew
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