Hi, Ms. Borrie,

Based on your explanation (Firebird 1.5), I replaced the field "CLI_DESCR" by its <column number> in the "Ordering Items" tab and all went well.

Thank you once more.

Regards,

RMiranda

----- Mensagem original ----
De: Helen Borrie <helebor@...>
Para: IBObjects@yahoogroups.com
Enviadas: Quinta-feira, 5 de Julho de 2007 11:28:41
Assunto: Re: [IBO] TIB_Grid













At 12:01 AM 6/07/2007, you wrote:

>Hi List,

>

>I use a TIB_Grid in wich one of the columns is a TIB_LookupCombo.

>The contents of the combo are selected through the TIB_Query linked:

>

>select v.cod_id,

> v.cli_id,

> (select c.nome from clientes c where (c.cli_id = v.cli_id)

> as cli_descr, // combo

> from vendas v

> order by v.cod_id desc

> for update

>

>The column cli_descr is one of the OrderingItems of the query. It is

>shown correctly in the grid, but does not accept the click on the

>title to change order.

>

>The error message:

>

>"Project Bean.exe raised exception class EIB_ISCError with message

>'ISC ERROR CODE: 335544569

>

>ISC ERROR MESSAGE:

>Dynamic SQL error

>SQL error code = -206

>Column unknown

>CLI_DESCR

>At line 27, column 20.

>'. Process stopped. Use step or run to continue."

>

>Am I doing somethig wrong or it is not possible to order by columns

>like this ?

It's not possible to order by expressions by referring to the

artificial name of a derived field. In Fb 1.5.x, ordering by an

expression can be achieved via the the 'order by <column_number>

syntax or by duplicating the expression in the Order By clause. I

don't think IBO has ever been able to support those via the

parser-generated statement that is involved with OrderingItems.



Now that Fb 2.0 supports expression indexes, I guess there is some

kind of outside chance Jason might find a way to hook up such an

index with OrderingItems. ...



Helen












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