Nees for better SQL error handling???
Hello everybody!
I am having problems with identifying the reason why SQLExceptions are thrown. What I mean is that the reason is stored in the sql state and the sql code variables. As far as I know, this sql code may be platform dependent which makes the whole mechanism somehow hard to use.
I simply miss sublasses of the SQLException like - DuplicateEntrySQLException, ForeignKeyConstraintFailureSQLException, ...
- I think this approach would be far too way natural and obvious.
My question is: does anybody know about a package or something like that which would implement a kind of "re-thrower" class which would consume the SQLException, inspect it and based on the exception's state it would throw a nice exception in the sense described above?
Thank you!
Cheers,
Miro
Why not check the data beforehand only?
Normally I have a validate method in which I run a check on the data submitted by the user. there I see if the Data is violating any of the foriegn key, unique constraints or length of the field.
I don't insert the data first into the DB without any validation.
If you don't do this, then there is no way for you to know whether the problem occurred because of the data provided by the user or because the DB is having system level or n/w level problem.
On the fly analysis is not possible because a DB (ex. oracle, sql server) each is capable of throwing ten thousand kind of errors. you really can't translate it by a package.
So the best way to handle your situation is that validate the data first. If there is a problem report it to the user. If validation suceeds then go ahead with the insert, update command.
If the user still gets an SQLException then it assume a system level error and display message like "Foo Portal is temporarily unavailable. Kindly call 4343343 in case of emergency"
Test your system pretty well specially the validation logic so that you don't display the sys unavailable message when the DB is available but the data has errors.
hope this helps.
regards,
Abhishek.
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3)valid records update, no reporting(request red)
4)valid records update, reporting (request green).
what is individual effect for my DSO, ple explain me acenerio,
for my DSO what can i select, why?
regards
suneel.Check this help - self explanatory - trying checking F1 thats very informative and self explantory most of the times
Switched off
If an error occurs, the error is reported as a package error in the DTP monitor. The error is not assigned to the data record. The cross-reference tables for determining the data record numbers are not built; this results in faster processing.
The incorrect records are not written to the error stack since the request is terminated and has to be updated again in its entirety.
No update, no reporting (default)
If errors occur, the system terminates the update of the entire data package. The request is not released for reporting. The incorrect record is highlighted so that the error can be assigned to the data record.
The incorrect records are not written to the error stack since the request is terminated and has to be updated again in its entirety.
Update valid records, no reporting (request red)
This option allows you to update valid data. This data is only released for reporting after the administrator checks the incorrect records that are not updated and manually releases the request (by a QM action, that is, setting the overall status on the Status tab page in the monitor).
The incorrect records are written to a separate error stack in which the records are edited and can be updated manually using an error DTP.
Update valid records, reporting possible
Valid records can be reported immediately. Automatic follow-up actions, such as adjusting the aggregates, are also carried out.
The incorrect records are written to a separate error stack in which the records are edited and can be updated manually using an error DTP. -
Dear all,
we are using oracle developer suite 10g r2 with oracle database 10g r2 against windows server 2003.
Error handling is a very big issue.
i try to do the following, just correct me, or make the trigger more efficient.
i face unexpected messages, like a message two time displayed, sometime important message never displayed.
i just set the :system.message_level =20 in the when-new-form-instance trigger.
and create on-error trigger like below
declare
errcode number:=error_code;dbmserrcode number;dbmserrtext varchar2(200);
formtxt varchar2(200);
errtype varchar2(3);
begin
--------- user defined database exceptions errors raised by --RAISE_APPLICATION_ERROR
IF DBMS_ERROR_CODE in (-20738,.......) then
raise form_trigger_failure;
end if;
if error_code=50017 then
message('duration must be between 0 and 23');message(' ',no_acknowledge);
raise form_trigger_fialure;
elsif
error_code=40202 then
clear_message;
message('please provide the required fields.');message(' ',no_acknowledge);
raise form_trigger_fialure;
elsif error_code=50022 then
clear_message;
message('time must be in the correct format.');message(' ',no_acknowledge);
raise form_trigger_fialure;
end if;
if error_code in (40509,40508) then
dbmserrcode:=dbms_error_code; dbmserrtext:=dbms_error_text;
if dbmserrcode=-1438 then
clear_message;
message('your number is too large.try again.');message(' ',no_acknowledge);
raise form_trigger_fialure;
elsif dbmserrcode=-1400 then
clear_message;
message('your forgot to provide a value.try again.');message(' ',no_acknowledge);
raise form_trigger_fialure;
elsif dbmserrcode=-2291 then
clear_message;
message('header is not found for this insertion.');message(' ',no_acknowledge);
raise form_trigger_fialure;
elsif dbmserrcode=-1 then
clear_message;
message('record already exists');message(' ',no_acknowledge);
raise form_trigger_fialure;
else
clear_message;
message(error_code||' : '||error_text);message(' ',no_acknowledge);
raise form_trigger_fialure;
end if;
else
clear_message;
message(error_code||' : '||error_text);message(' ',no_acknowledge);
raise form_trigger_fialure;
end if;
exception
when others then
if dbms_error_code=-20738 then
clear_message;
message('Error: absent or later record errror from the database trigger.);
raise form_trigger_failure;
elsif .....
esle
clear_message;
message(error_code||' : '||error_text);message(' ',no_acknowledge);
raise form_trigger_fialure;
end if;
end;any suggession?
Regardsi must come with a plsql code which handle every error and suppress unnecessary messages.Good luck with that. No matter how well thought out or planned, you're not going to be able to take all scenarios into account. The design of an exception handler takes time to address all possible scenarios you want handled and even then, you're not likely to handle every situation in the beginning.
could we implement the oracle ebusiness error handling procedures here in our application?if yes, then where could we find that procedure?>
I've dug through that code and it is not a thorough as you think it is. It handles specific situations and then defaults the rest. It is a good model for your own exception handler, however. That is what I used it for. :) I don't recall which library it is in, but I'll look around and if I find it, I'll post it.
I agree with Andreas's comment...
Simply remove your ON-ERROR-trigger, then you have a default. That's nothing better or worse than what apex has.I'm not too familiar with Apex; I've worked with it, but it's been a little while. Even with Apex, you're going to have to develop a customized Exception Handler so more intuitive or application specific messages are displayed in response to an exception.
As to Andreas's comment...
For your own error-handling... The "simplest" way in my eyes is create your own error-table where you have appropiate columns for the error-code and the error-type (FRM,ORA,Whatever), then in your ON-ERROR-trigger read the appropiate record from that table and show the error. You could also have a flag in your table which decides what to do with a specific error (Show as Message, Show as Alert, Don't show at all) and react accordingly.This is exactly what we implemented in our application. We created a set of tables that contain all of the Oracle Runtime errors and their attributes (Error Type, Severity Level, etc). Then we wrote a standard On-Error trigger that is subclassed to all of our forms that calls a Library "On_Error" package. This package evaluates the exception raised, compares it to the database entry for the error and then displays an appropriate message depending on the Severity Level, Error Type (ORA or FRM) and Message Type (Informational, Error, Caution) and we display the message in either the Status Bar, Note Alert, Caution Alert or Stop Alert or it is supressed. If an error is not found in the table, then it is displayed in a Stop Alert as an "Unhandled Exception." The second table I mentioned contains all of the messages used by our application and is cross referenced with the table that contains the Oracle messages. By simply assigned one of our messages to an Oracle message - our package will display our message instead of the default Oracle Message. Yes, this took sometime to build and test and once implemented, we spent another couple of months perfecting it, but now it is pretty solid and we haven't had to modify it in over a year.
While this level of complexity may be overkill for your application, it does offer the greatest flexibility in the long-run. Also, if your application must support multiple languages, having all of your messages in a table make internationalization extremely easy. :)
The point of all this, is that no matter which system you use (Forms, Apex, or Java) you will still need to invest some time into designing an Excpeiton Handling method for your application and then implement it accross the application. This is not something you can develop in a short period of time and it will not be perfect in the beginning. However, in the long-run, you will be happy you spent the time up-front to build a flexible and robust Exception Handling system.
Craig... -
Receiving SQL Error: INTERNAL_ERROR while executing the query
Dear All,
I am receiving the below error while executing a query.
SQL Error: INTERNAL_ERROR
Diagnosis
The database system registered an SQL error. As available, the error number and a description are included in the short text. Possible causes for SQL errors include:
Overflow of database objects such as buffers, temporary tablespaces, rollback segments or data containers/tablespaces.
->These problems can generally be eliminated by system administrators.
Missing generated database objects such as tables or views based on inconsistent or inactive InfoCubes or InfoObjects. Examples of this include the view of the fact table for an InfoCube or the attribute SID table (X/Y table) of a characteristic.
-> These problems can generally be eliminated by a BW administrator.
SQL requests with incorrect content.
-> Problems of this type are generally programming errors.
System Response
Procedure
Contact your system administrator.
Procedure for System Administration
If there is no error description, look for one in the reference from the database producer.
Decide on the correct category for the SQL error and check if it can be eliminated. Generally the error can also be found in the syslog (transaction sm21). From there, transactions sm51 and sm50, the developer's trace log of the work process can be determined and the erroneous statement can be viewed in the log. This procedure is described in SAP Note 568768.
Notification Number DBMAN 257
I verified the table spaces and also done RSRV Repair of InfoObjects and InfoCubes and didnt find any error. But I am receiving this error for one particular month and remaining months are executing fine. Any ideas why i am receiving this error.
Regards
Ravi YOSS Note 1305568:
Symptom
A data mart query that
you want to execute within a data transfer process (DTP), for example, terminates with the
SQL error -1013 "Too many order columns".
The following is displayed in the monitor log of the data transfer process:
Error while extracting from source xxxxxx (type InfoProvider)
Message number RSBK 242
Exception CX_SQL_EXCEPTION occurred (program:
CL_SQL_STATEMENT==============CP, include:
CL_SQL_STATEMENT==============CM004, line: 32).
Message number RS_EXCEPTION 000
SQL error: POS(3306) Too many order columns
Message number DBMAN 257
Error reading the data of InfoProvider xxxxxx
Message number DBMAN 305
You have already implemented Note 1065380.
Other terms
CX_SQL_EXCEPTION, message number, RS_EXCEPTION 000, DBMAN 257, RSBK 242,
RS_EXCEPTION 000
Reason and Prerequisites
The MaxDB internal limit of 4016 bytes or 128 fields for GROUP BY columns was exceeded.
Solution
When you implement these corrections, no aggregation is performed for the data (GROUP BY) if the limits of the MaxDB database have been exceeded.
The limit values for the aggregation bahavior can also be manually reduced if there are problems with the default values.
Two RSADMIN parameters are provided for this.
MAXDB_MAX_GROUP_BY_FLDS is the maximum number of GROUP BY fields. The default value is 128.
MAXDB_MAX_GROUP_BY_LEN is the maximum total length of the GROUP BY fields. The default value is 4000.
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