Hello.
Hm, I'm not sure what article you're referring to
I mean article as your writing in DERBY-254
http://issues.apache.org/jira/browse/DERBY-254
I came to confused.
I thought you know what is client exception and what is embedded exception and ,
did not have implement to distinguish them in the program yet and ,
tried to make the implementation to distinguish them in DERBY-254 .
//Or do I musunderstood something at all ....?
//Is it not what you wanted to do ,to distingish client exception from embedded
exception ?
Best regards.
/*
Tomohito Nakayama
[EMAIL PROTECTED]
[EMAIL PROTECTED]
[EMAIL PROTECTED]
Naka
http://www5.ocn.ne.jp/~tomohito/TopPage.html
*/
----- Original Message -----
From: "David W. Van Couvering" <[EMAIL PROTECTED]>
To: "Derby Development" <[email protected]>
Sent: Wednesday, October 12, 2005 7:38 AM
Subject: Re: Question about error messages (Re: Discussions on Wiki ...)
Hm, I'm not sure what article you're referring to, but I think there are
two important ways we want to make a distinction. First of all, when
running in client/server mode, there are a class of exceptions that the
network client gets from the server and a class of exceptions that it
throws by itself. How these are handled and thrown in the network
client are slightly different. But so far that discussion doesn't seem
to have come up much.
Then, from the viewpoint of code sharing, there are two JDBC drivers,
embedded and network client. Each of them have their own exceptions
they throw. *some* of these exceptions (actually, a large class of them)
are exactly the same error (e.g. "invalid max value passed as a
paramter" and "this routine is not implemented." ) The exceptions that
are common between client driver and embedded driver should have the
same SQL State and severity. I also plan on sharing the messages so
that the translations can also be shared, saving us some significant
duplication of effort.
I have a feeling I'm still missing it, but we're getting there.
Are you still on for 4:30 today for a Skype chat?
David
TomohitoNakayama wrote:
Hello.
If I understand you correctly, you are asking how the user
(a) can tell if they're using the network driver or embedded driver and
The DatabaseMetadata of a connection gives you the driver name,
product name, version, etc. Would this give the information you're
looking for?
(b) can tell if the exception came from the client or the server
I don't think it's reasonable to want the SQLState to be different; I
think that many users very much want them to be the *same* across the
drivers, for the same error. Kathey and Dan have made it pretty clear
they should be the same.
No no.
I ask you what "you" want to distinguish in this issue.
There seems to be concept of "error of embedded" and "error of network"
in your article.
However, it is ambigous what is the difference between them.
At least , I couldn't read what they exactly are.
Best regards.
/*
Tomohito Nakayama
[EMAIL PROTECTED]
[EMAIL PROTECTED]
[EMAIL PROTECTED]
Naka
http://www5.ocn.ne.jp/~tomohito/TopPage.html
*/
----- Original Message ----- From: "David W. Van Couvering"
<[EMAIL PROTECTED]>
To: "Derby Development" <[email protected]>
Sent: Wednesday, October 12, 2005 2:52 AM
Subject: Re: Question about error messages (Re: Discussions on Wiki ...)
If I understand you correctly, you are asking how the user
(a) can tell if they're using the network driver or embedded driver and
The DatabaseMetadata of a connection gives you the driver name,
product name, version, etc. Would this give the information you're
looking for?
(b) can tell if the exception came from the client or the server
I don't think it's reasonable to want the SQLState to be different; I
think that many users very much want them to be the *same* across the
drivers, for the same error. Kathey and Dan have made it pretty clear
they should be the same.
And we have also agreed that using the error code or the implementing
class of SQLException is not valid because neither of these are public
(and therefore stable) interfaces.
In the network client, when you construct a SQLException, the full
diagnostics of the exception are written to the configured log:
if (logWriter != null) {
logWriter.traceDiagnosable(this);
if the exception is from the server, then the trace diagnostics
contain information that makes it clear the exception is from the server:
if ( sqlca != null )
printWriter.println(header + " DERBY SQLCA from server");
printWriter.println(header + " SqlCode = " +
sqlca.getSqlCode());
printWriter.println(header + " SqlErrd = " +
Utils.getStringFromInts(sqlca.getSqlErrd()));
printWriter.println(header + " SqlErrmc = " +
sqlca.getSqlErrmc());
printWriter.println(header + " SqlErrmcTokens = " +
Utils.getStringFromStrings(sqlca.getSqlErrmcTokens()));
printWriter.println(header + " SqlErrp = " +
sqlca.getSqlErrp());
printWriter.println(header + " SqlState = " +
sqlca.getSqlState());
printWriter.println(header + " SqlWarn = " + new
String(sqlca.getSqlWarn()));
It seems to me this should give the user the information they need,
right?
Thanks,
David
TomohitoNakayama wrote:
Hello.
This is question around next .
http://wiki.apache.org/db-derby/JDBC_error_messages_and_SQL_States
And it seems have something a lot to do with DERBY-254 .
http://issues.apache.org/jira/browse/DERBY-254
As in DERBY-254, there seems to be concept of "error of embedded" and
"error of network" .
However, it is not clear what does distinguish one from another .
* Whether user uses network or embedded driver distinguishes ? *
Whether exception happens in network or embedded implementation
distinguishes ?
Best regards .
/*
Tomohito Nakayama
[EMAIL PROTECTED]
[EMAIL PROTECTED]
[EMAIL PROTECTED]
Naka
http://www5.ocn.ne.jp/~tomohito/TopPage.html
*/
----- Original Message ----- From: "David W. Van Couvering"
<[EMAIL PROTECTED]>
To: "Derby Development" <[email protected]>
Sent: Saturday, October 08, 2005 5:44 AM
Subject: Re: Discussions on Wiki - WAS Re: SQL functions, procedures
and PSM - a possible approach
Hi, Tomohito. It would be great if you could summarize your
concerns in email and we can continue our discussion on the list.
If it would help, I'm also more than open for you and I to have an
IRC conversation, log it, and send the log out to the list. We do
seem to be a bit stuck :)
David
TomohitoNakayama wrote:
Hello.
I understand. Sorry for disturbing .
I had come to feel difficulties in discussing at Wiki.
Should I ask David my question in mailing list once more ?
Best regards.
/*
Tomohito Nakayama
[EMAIL PROTECTED]
[EMAIL PROTECTED]
[EMAIL PROTECTED]
Naka
http://www5.ocn.ne.jp/~tomohito/TopPage.html
*/
----- Original Message ----- From: "David W. Van Couvering"
<[EMAIL PROTECTED]>
To: "Derby Development" <[email protected]>
Sent: Friday, October 07, 2005 12:40 PM
Subject: Re: Discussions on Wiki - WAS Re: SQL functions,
procedures and PSM - a possible approach
I'm getting a little concerned, it feels a little quiet over there
in the corner with Tomohito and I, and I was about to propose with
Tomohito that we move it back to the list.
David
Daniel John Debrunner wrote:
David W. Van Couvering wrote:
This sounds great, Dan! Is this a good candidate for putting up
on the
Wiki site as a proposal?
Is anyone else concerned by the movement of discussion to the
wiki for
the common code stuff? The Apache way is for discussions to occur
on the
mailing lists. It seems to me that the wiki is a great way to
summarize
such discussions, but not to hold them. A wiki page related to a
discussion can provide a very useful single overview, something that
does get lost in mailings as the discussion spreads out.
Dan.
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