TdaSQLBuilder.SearchCriteria.Add does not handle date properly

rbuser

Hi,

I have a terrible depression just thinking of solving this.

My regional setting (in the Windows control panel) for ShortDate is
"mmm/dd/yy"

I need to filter a report with dates, therefore I write below codes:

x := TdaSQLBuilder.Create(ppReport1.DataPipeLine.SQL);
x.SearchCriteria.Add('duty_table','duty_date','operator', DateToStr(Now))

but when I run
x.ApplyUpdates;

it gives an EConvertError!!

I don't want to change my regional settings because my boss instruct me to
write a code that is independent of client PC's regional setting.. ;<

Pls help, TQ
Arif

rbuser

I'm sorry, it doesn't gives EConvert Error yet.


x := TdaSQLBuilder.Create(ppReport1.DataPipeLine.SQL);
x.SearchCriteria.Add('duty_table','duty_date','>=', DateToStr(Aug/01/07))

After I ran
x.ApplyUpdates;

I check the SQL
sSQL := x.SQL.MagicSQLText.Text;

and it converts my date wrongly!
sSQL = '...where duty_date >= '08/07/2001'...'



Then only I try to change the supplied date to the SearchCriteria.Add
function
x.SearchCriteria.Add('duty_table','duty_date','>=', DateToStr(01/08/2007))

and it gives EConvertError.

Please help, TQ.
Arif



----- Original Message -----
From: "Arif"
Newsgroups: digital-metaphors.public.reportbuilder.datapipelines
Sent: Tuesday, August 07, 2007 11:44 PM
Subject: TdaSQLBuilder.SearchCriteria.Add does not handle date properly

nardmoseley

- for future reference, please specify Delphi version, ReportBuilder
version, Windows version, and database product and data access components.

- the TdaSQLBuilder.SearchCriteria.Add call looks correct and using
Delphi's DateToStr is correct.

- check that you are specifying the correct DataSettings.SessionType and
DatabaseType for the database product that are using. These settings
determines how the SQL string is generated. Different databse engines
require different date formats. See point number 2 in the tech tip below.

- add an entry for RBuilder\Source to your Delphi library path and trace the
code in daSQL.pas for the method, TdaSQL.ResolveCriteria which contains a
local function called FormatValue. The FormValue function formats the date
value based upon the SessionType and DatabaseType.


-------------------------------------------------
Tech Tip: Date formats used by DADE
-------------------------------------------------

DADE handles in two phases:


1. User entry

This occurs when the user specifies a date using the Query tools or the
AutoSearch dialog. DADE converts the date string entered by the user into a
Delphi TDateTime value. The string entered by the user is converted using
Delphi's StrToDateTime. By default Delphi's StrToDateTime relies on the date
formatting variables for the current windows locale. These can be overridden
by the developer. See Delphi online help for StrToDateTime for more
information.


2. SQL submitted to the server

When generating the SQL to be submitted to the database server, DADE
converts the TDateTime value from number 1 above, to a string using the
Delphi's FormatDateTime function. The format string used to convert the
TDateTime is specified by the TdaSession.GetSearchCriteriaDateFormat and
TdaSession.GetSearchCriteriaTimeFormat functions. These are virtual methods
which may be overridden by descendant TdaSession classes.

Below are the default values returned.


{------------------------------------------------------------------------------}
{ TdaSession.GetSearchCriteriaDateFormat }

function TdaSession.GetSearchCriteriaDateFormat(aDatabaseType:
TppDatabaseType; const aDatabaseName: String): String;
begin

{return a format usable by FormatDate}
case aDatabaseType of

dtMSAccess:
Result := 'YYYY-MM-DD';

dtMSSQLServer, dtSybaseASA, dtSybaseASE, dtOracle:
Result := 'YYYY/MM/DD';

dtAdvantage:
Result := 'YYYY-MM-DD';

else
Result := 'MM/DD/YYYY';

end;

end; {function, GetSearchCriteriaDateFormat}

{------------------------------------------------------------------------------}
{ TdaSession.GetSearchCriteriaTimeFormat }

function TdaSession.GetSearchCriteriaTimeFormat(aDatabaseType:
TppDatabaseType; const aDatabaseName: String): String;
begin
{return a format usable by FormatDateTime}
case aDatabaseType of

dtMSAccess:
Result := 'HH::MM::SS';

else
Result := 'HH:MM:SS';
end;

end; {function, GetSearchCriteriaTimeFormat}



Note: DADE augments the above with additional formatting delimiters for
Oracle and MSAccess. See TdaSQL.ResolveCriteria located in
RBuilder\Source\daSQL.pas for more information.






--
Nard Moseley
Digital Metaphors
www.digital-metaphors.com

rbuser

Thank you.

I'm using Delphi 7.0, RB 10.04, Windows XP Pro SP2, Interbase 6.1,
IBExpress.

Any tips?

nardmoseley

Yes, my prior post included a comprehensive answer. Please re-read my
complete post.


DataSettings should be...

SessionType = IBXSession
DatabasType = dtInterbase
SQLType = SQL2


--
Nard Moseley
Digital Metaphors
www.digital-metaphors.com