Weird problem with mysql query and data table buttons !!!!

Question

Hi,
I'm using jsc 2 update 1 on windows and mysql 4.1 . I have a page with a data table. One column of the data table contains "Details" buttons.
Source query for the table is :
SELECT tbl_tesserati.idtbl_tesserati idTesserato,
tbl_tesserati.num_tessera,
tbl_tesserati.nome,
tbl_societa.codice_meccanografico
FROM tbl_tesserati
INNER JOIN tbl_rel_tesserato_discipline_societa ON tbl_tesserati.idtbl_tesserati = tbl_rel_tesserato_discipline_societa.id_tesserato
INNER JOIN tbl_cariche ON      tbl_rel_tesserato_discipline_societa.id_carica = tbl_cariche.idtbl_cariche
INNER JOIN tbl_qualifiche ON      tbl_rel_tesserato_discipline_societa.id_qualifica = tbl_qualifiche.idtbl_qualifiche
INNER JOIN tbl_discipline ON      tbl_rel_tesserato_discipline_societa.id_disciplina = tbl_discipline.idtbl_discipline
INNER JOIN tbl_societa ON      tbl_rel_tesserato_discipline_societa.id_societa = tbl_societa.idtbl_societa
LEFT JOIN tbl_province ON tbl_societa.provincia_sede_sociale = tbl_province.idtbl_province
LEFT JOIN tbl_comuni ON tbl_societa.comune_sede_sociale = tbl_comuni.idtbl_comuni
LEFT JOIN tbl_rel_tesserato_discipline_praticate ON tbl_rel_tesserato_discipline_praticate.tessera_id=
tbl_rel_tesserato_discipline_societa.idtbl_rel_tesserato_discipline
LEFT JOIN tbl_discipline_praticate ON tbl_discipline_praticate.idtbl_disciplina_praticate=tbl_rel_tesserato_discipline_praticate.disciplina_praticata_id
WHERE
tbl_tesserati.cognome LIKE ?
AND tbl_tesserati.nome LIKE ?
AND tbl_rel_tesserato_discipline_societa.id_societa LIKE ?
AND tbl_tesserati.idtbl_tesserati LIKE ?
AND tbl_cariche.idtbl_cariche LIKE ?
AND tbl_qualifiche.idtbl_qualifiche LIKE ?
AND tbl_tesserati.data_nascita >= ?
AND tbl_tesserati.data_nascita<= ?
AND tbl_discipline.idtbl_discipline LIKE ?
AND codice_affiliazione LIKE ?
AND tbl_societa.denominazione LIKE ?
AND YEAR(tbl_rel_tesserato_discipline_societa.data_scadenza) LIKE ?
AND (tbl_province.nome LIKE ? OR tbl_province.nome IS NULL)
AND ( tbl_comuni.nome LIKE ? OR tbl_comuni.nome IS NULL)
The tbl_tesserati.data_nascita is a mysql date field.
The click event handler code for the "Details" Button is:
public String btnModificaTesserato_action() {
        try{
            TableRowDataProvider rowData= (TableRowDataProvider)getBean("currentRowTesserati");
            getRequestBean1().setId_tesserato((Long)rowData.getValue("idTesserato"));          
        } catch(Exception ex) {
            log("errore nella query",ex);
        return "dettaglioTesseratoSocieta";
    }When i run the project and open the page the table is correctly rendered and populated with some rows. But when i click on details button nothing happens, the page is simply reloaded.
If i set a breakpoint in the code line   TableRowDataProvider rowData= (TableRowDataProvider)getBean("currentRowTesserati");the debbuger does not stop the code execution ! As if the button was never clicked!
I tried to modify the source query to :
SELECT tbl_tesserati.idtbl_tesserati idTesserato,
tbl_tesserati.num_tessera,
tbl_tesserati.nome,
tbl_societa.codice_meccanografico
FROM tbl_tesserati
INNER JOIN tbl_rel_tesserato_discipline_societa ON tbl_tesserati.idtbl_tesserati = tbl_rel_tesserato_discipline_societa.id_tesserato
INNER JOIN tbl_cariche ON      tbl_rel_tesserato_discipline_societa.id_carica = tbl_cariche.idtbl_cariche
INNER JOIN tbl_qualifiche ON      tbl_rel_tesserato_discipline_societa.id_qualifica = tbl_qualifiche.idtbl_qualifiche
INNER JOIN tbl_discipline ON      tbl_rel_tesserato_discipline_societa.id_disciplina = tbl_discipline.idtbl_discipline
INNER JOIN tbl_societa ON      tbl_rel_tesserato_discipline_societa.id_societa = tbl_societa.idtbl_societa
LEFT JOIN tbl_province ON tbl_societa.provincia_sede_sociale = tbl_province.idtbl_province
LEFT JOIN tbl_comuni ON tbl_societa.comune_sede_sociale = tbl_comuni.idtbl_comuni
LEFT JOIN tbl_rel_tesserato_discipline_praticate ON tbl_rel_tesserato_discipline_praticate.tessera_id=
tbl_rel_tesserato_discipline_societa.idtbl_rel_tesserato_discipline
LEFT JOIN tbl_discipline_praticate ON tbl_discipline_praticate.idtbl_disciplina_praticate=tbl_rel_tesserato_discipline_praticate.disciplina_praticata_id
WHERE
tbl_tesserati.cognome LIKE ?
AND tbl_tesserati.nome LIKE ?
AND tbl_rel_tesserato_discipline_societa.id_societa LIKE ?
AND tbl_tesserati.idtbl_tesserati LIKE ?
AND tbl_cariche.idtbl_cariche LIKE ?
AND tbl_qualifiche.idtbl_qualifiche LIKE ?
AND tbl_tesserati.data_nascita >= ?
OR tbl_tesserati.data_nascita<= ?
AND tbl_discipline.idtbl_discipline LIKE ?
AND codice_affiliazione LIKE ?
AND tbl_societa.denominazione LIKE ?
AND YEAR(tbl_rel_tesserato_discipline_societa.data_scadenza) LIKE ?
AND (tbl_province.nome LIKE ? OR tbl_province.nome IS NULL)
AND ( tbl_comuni.nome LIKE ? OR tbl_comuni.nome IS NULL)
Using this query everything works well !! The click handler works and the debugger too !!
I changed only the AND in OR !!!
I also tried to change mysql-x-x-connector driver but without solving my problem.
Can someone help me ?
Thanks
Giorgio

Answer 1

You'll find that it is more to do with the way MySql deals with dates than anything else! Depending on how your date field is setup, then try using a BETWEEN statement for those 2 lines in your first query e.g.
AND ( tbl_tesserati.data_nascita BETWEEN ? AND ?)
The date column needs to be in the ISO format to work. If you examine your second query output, you might discover that the output is only going to refer to one parameter (probably the OR one). Did you manage to view the output logs from the application server? You would have got an idea from there with a message like stating a conversion error'.
Alternatively, you could try using the to_days() function and convert it directly to a number which would be a lot easier to deal with. For example:
AND to_days(tbl_tesserati.data_nascita >= ? )
AND to_days( tbl_tesserati.data_nascita<= ? )
Or try the BETWEEN version with to_days() and see what you get.
More info about date formatting (v5) here:
http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html#function_to-days
Before I forget, sometimes you may need to treat dates as Strings rather 'Long' as you did.
As a matter of interest, did you try your query in a different piece of software?
If my queries are a little more complicated, I tend to try MySql queries out in the free MySql query browser and also double check in another to verify certain issues. I found it easier to develop SQL in a seperate program then import the final version to JSC making the required modifications for parameters.
Message was edited by:
aerostra