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<div class=Section1>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>Why is it OK
for APIs like JDBC and ODBC to expose a data source specific error codes and
not FDO? Probably because it’s certainly useful in some scenarios, and to
me that trumps arguments about encouraging bad data source specific coding behavior…<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>Alan<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal align=left style='text-align:left'><b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
fdo-internals-bounces@lists.osgeo.org
[mailto:fdo-internals-bounces@lists.osgeo.org] <b>On Behalf Of </b>Dan Stoica<br>
<b>Sent:</b> Wednesday, June 17, 2009 1:44 PM<br>
<b>To:</b> FDO Internals Mail List<br>
<b>Subject:</b> RE: [fdo-internals] RE: FDO RFC 37 - Detailed Exception is
ready for review.<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal align=left style='text-align:left'><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>No. There is
nothing ‘native’ (i.e. an underlying engine of some sort that the
provider talks to) in this case.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal align=left style='text-align:left'><b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
fdo-internals-bounces@lists.osgeo.org [mailto:fdo-internals-bounces@lists.osgeo.org]
<b>On Behalf Of </b>Traian Stanev<br>
<b>Sent:</b> Wednesday, June 17, 2009 4:38 PM<br>
<b>To:</b> FDO Internals Mail List<br>
<b>Subject:</b> RE: [fdo-internals] RE: FDO RFC 37 - Detailed Exception is
ready for review.<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal align=left style='text-align:left'><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>Yes, like SHP.
Are the error codes also going to apply to the SHP provider for example? Is it
going to throw some kind of meaningful integer error code?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal align=left style='text-align:left'><b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
fdo-internals-bounces@lists.osgeo.org
[mailto:fdo-internals-bounces@lists.osgeo.org] <b>On Behalf Of </b>Dan Stoica<br>
<b>Sent:</b> Wednesday, June 17, 2009 4:35 PM<br>
<b>To:</b> FDO Internals Mail List<br>
<b>Subject:</b> RE: [fdo-internals] RE: FDO RFC 37 - Detailed Exception is
ready for review.<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal align=left style='text-align:left'><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>Like SHP?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>Dan.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal align=left style='text-align:left'><b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
fdo-internals-bounces@lists.osgeo.org
[mailto:fdo-internals-bounces@lists.osgeo.org] <b>On Behalf Of </b>Traian Stanev<br>
<b>Sent:</b> Wednesday, June 17, 2009 4:29 PM<br>
<b>To:</b> FDO Internals Mail List<br>
<b>Subject:</b> RE: [fdo-internals] RE: FDO RFC 37 - Detailed Exception is
ready for review.<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal align=left style='text-align:left'><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>OK so it can be
common for providers based on the FdoRdbms code, but there are a dozen other providers.
What about them?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>Traian<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal align=left style='text-align:left'><b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
fdo-internals-bounces@lists.osgeo.org
[mailto:fdo-internals-bounces@lists.osgeo.org] <b>On Behalf Of </b>Dan Stoica<br>
<b>Sent:</b> Wednesday, June 17, 2009 4:27 PM<br>
<b>To:</b> FDO Internals Mail List<br>
<b>Subject:</b> RE: [fdo-internals] RE: FDO RFC 37 - Detailed Exception is
ready for review.<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal align=left style='text-align:left'><o:p> </o:p></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='font-size:11.0pt;font-family:Wingdings;color:#1F497D'><span
style='mso-list:Ignore'>Ø<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span
style='font-size:11.0pt;color:#1F497D'>Do SQLServer and Oracle have the same
error codes?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D'>No, they
don’t. This is my point, e.g. OCIDR_RDBI_END_OF_FETCH can be mapped to RDBI_END_OF_FETCH
and such type of error is common to SQLServer, MySql etc. I suppose it’s
not a crime to also have RDBI_ORA_xxx for specific cases (oddities).<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D'>Currently we
get a localized “End of fetch” message but not the error code. And
the native error message is lost along the way, although FdoException allows
for a ‘cause’ detail…<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D'>Dan.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal align=left style='text-align:left'><b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
fdo-internals-bounces@lists.osgeo.org
[mailto:fdo-internals-bounces@lists.osgeo.org] <b>On Behalf Of </b>Traian
Stanev<br>
<b>Sent:</b> Wednesday, June 17, 2009 4:06 PM<br>
<b>To:</b> FDO Internals Mail List<br>
<b>Subject:</b> RE: [fdo-internals] RE: FDO RFC 37 - Detailed Exception is
ready for review.<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal align=left style='text-align:left'><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>My assumption
was that the integer error codes would be potentially different for each
provider, since the RFC mentions native error codes for SQLServer and Oracle.
Do SQLServer and Oracle have the same error codes?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>Traian<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal align=left style='text-align:left'><b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
fdo-internals-bounces@lists.osgeo.org
[mailto:fdo-internals-bounces@lists.osgeo.org] <b>On Behalf Of </b>Dan Stoica<br>
<b>Sent:</b> Wednesday, June 17, 2009 3:59 PM<br>
<b>To:</b> FDO Internals Mail List<br>
<b>Subject:</b> RE: [fdo-internals] RE: FDO RFC 37 - Detailed Exception is
ready for review.<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal align=left style='text-align:left'><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>Talking about
the native error codes apparently the RFC doesn’t say how they look
like…<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>In my mind the
native error codes are not necessary a direct mapping to </span><em><span
style='font-family:"Arial","sans-serif";color:#1F497D'>ORA</span></em><span
style='font-family:"Arial","sans-serif";color:#1F497D'>-02429, for example. A
rdbms driver has limited ability to extract the exact cause anyways. (Even the
native error messages are sometimes very cryptic or ambiguous or both)
Therefore the numerical ‘native’ error code is in fact ‘low
level’ error code and provider agnostic like </span><span
style='font-size:10.0pt;font-family:"Courier New"'>RDBI_DATA_TRUNCATED</span><span
style='font-family:"Arial","sans-serif";color:#1F497D'>.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#1F497D'>Dan.</span><span
style='font-size:11.0pt;color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal align=left style='text-align:left'><b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
fdo-internals-bounces@lists.osgeo.org
[mailto:fdo-internals-bounces@lists.osgeo.org] <b>On Behalf Of </b>Traian
Stanev<br>
<b>Sent:</b> Wednesday, June 17, 2009 12:04 PM<br>
<b>To:</b> FDO Internals Mail List<br>
<b>Subject:</b> RE: [fdo-internals] RE: FDO RFC 37 - Detailed Exception is
ready for review.<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal align=left style='text-align:left'><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>My main concern
is that having native error codes encourages the client code to be non-generic,
in that it would have to know which provider it is working with, in order to
handle the native error code correctly. Of course, that is a concern about the
client code, not FDO itself, so the client code is free to handle this any way
it wants… including in bad ways.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>Traian<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal align=left style='text-align:left'><b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
fdo-internals-bounces@lists.osgeo.org [mailto:fdo-internals-bounces@lists.osgeo.org]
<b>On Behalf Of </b>Dan Stoica<br>
<b>Sent:</b> Tuesday, June 16, 2009 10:10 AM<br>
<b>To:</b> FDO Internals Mail List<br>
<b>Subject:</b> [fdo-internals] RE: FDO RFC 37 - Detailed Exception is ready
for review.<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal align=left style='text-align:left'><o:p> </o:p></p>
<div style='border:solid #D7D7D7 1.0pt;padding:3.0pt 3.0pt 3.0pt 3.0pt'>
<p class=MsoNormal align=left style='mso-margin-top-alt:12.0pt;margin-right:
28.5pt;margin-bottom:12.0pt;margin-left:28.5pt;text-align:left;background:#F7F7F7'><span
lang=EN style='font-size:10.0pt;font-family:"Courier New";color:black'>catch
(FdoException* e)<br>
{<br>
FdoInt64 errorCode = e->GetNativeErrorCode();<br>
e->Release();<o:p></o:p></span></p>
<p class=MsoNormal align=left style='mso-margin-top-alt:12.0pt;margin-right:
28.5pt;margin-bottom:12.0pt;margin-left:28.5pt;text-align:left;background:#F7F7F7'><span
lang=EN style='font-size:10.0pt;font-family:"Courier New";color:black'>
// Take some measures according to native error code<br>
......<br>
}<o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>I think no
matter how many exception subclasses are invented, the only useful thing for
handling the error is the error code.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>And I said
before, another very useful thing to have is the ability to distinguish between
errors and warnings.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>Dan.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal align=left style='text-align:left'><b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
fdo-internals-bounces@lists.osgeo.org
[mailto:fdo-internals-bounces@lists.osgeo.org] <b>On Behalf Of </b>Leaf Li<br>
<b>Sent:</b> Monday, June 15, 2009 9:37 PM<br>
<b>To:</b> fdo-internals@lists.osgeo.org<br>
<b>Subject:</b> [fdo-internals] FDO RFC 37 - Detailed Exception is ready for
review.<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal align=left style='text-align:left'><o:p> </o:p></p>
<p class=MsoNormal>All,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>FDO RFC 37 - Detailed Exception is ready for review. Can you
review it?<o:p></o:p></p>
<p class=MsoNormal><a href="http://trac.osgeo.org/fdo/wiki/FDORfc37">http://trac.osgeo.org/fdo/wiki/FDORfc37</a><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks,<o:p></o:p></p>
<p class=MsoNormal>Leaf Li<o:p></o:p></p>
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