TRY CATCH with dynamic ORDER BY

Some stored procs need a dynamic ORDER BY, unfortunately.
Can I use a TRY CATCH with ORDER BY?
SELECT ...
FROM ...
WHERE...
BEGIN TRY
ORDER BY ...complex stuff
END TRY
BEGIN CATCH
ORDER BY ColumnA
END CATCH

Hi mmmtbig,
Syntactically, it is ok to use any valid sql statement in the TRY AND CATCH block.
SELECT 1 as num
BEGIN TRY
SELECT 1/0 AS seq UNION SELECT 2 ORDER BY seq;
END TRY
BEGIN CATCH
PRINT ERROR_MESSAGE();
SELECT 1 AS seq UNION SELECT 2 ORDER BY seq;
END CATCH
For more details, You can reference
TRY...CATCH.
The confusion about your question is the "dynamic ORDER BY". What do you mean by that, can you elaborate your requirement, like in what scenario you'd like to use the code block in your post and what issue have stopped you from doing that?
If you have any feedback on our support, please click
here.
Eric Zhang
TechNet Community Support

Similar Messages

Report with dynamic order by (binding of parameter)

hy,
my problem is the following:
i want to let the user customize the ordering of a portal report.
but the binding does not really work, the bind variable seems to
have no effect in the order by clause.
code sample:
select * from SCOTT.EMP order by :p_order
then, portal gets the right value for the parameter:
:p_order binding with HIREDATE
but: this results in an emp table sorted by the empno.....
and not by the hiredate
do you have any ideas how to get this working ???
thanx, martin allhoff

Hi, the way to do this is to pass in a different set of
parameters. Try not using the :bind parameter in the report
query, but instead, call your report like this:
http:// ... /pls/portal30/Schema.report.show?
p_arg_names=_ORD_BY_COL&P_arg_values=HIREDATE
then try calling
http:// ... /pls/portal30/Schema.report.show?
p_arg_names=_ORD_BY_COL&P_arg_values=EMPNO
to see if indeed it is dynamically selecting the order by clause
based on the info passed in. Also, check my syntax, I cant
remember if ORDBY_COL is correct or not. But any possible
options should be listed for you in the "Display Call Interface"
screen for the report.

How to simulate a dml error in order to test try-catch code block inside a stored procedure

Hi,
What would be the easiest way to simulate a dml error in order to test a try catch block.
I would like to do it with a simple command from outside the stored procedure if possible.
I tried dropping the table that was updated but it hangs
Thanks,
Dani

Dropping the table that is the target of the procedure will give you an unpleasant surprise: the CATCH block will not fire. To wit, errors like missing tables can only be caught in outer scopes, but not in the procedure where the error occurs.
But you would add a fake constraint to a table which causes the update to fail. You need to do this in advance, not while running the procedure.
Erland Sommarskog, SQL Server MVP, [email protected]

I'm getting the below issue when I try to deploy a report with Dynamic parameters, when I deploy it with static parameters I'm not getting this issue.

I’m getting the below issue when I try to deploy a crystal report with Dynamic parameters in BI Launch Pad, when I deploy the same report with static parameters I can deploy and run it. I have Restarted the BI server, still the issue exitno use. kindly help me on this issue.
“This error occurred: Adding Crystal Report "CrystalReport1.rpt" failed. The server with kind rptappserver returned an error result. Failed to copy the report file to the report object. Refreshing the report object properties might have failed. Failed to read data from report file CrystalReport1. Reason: Failed to read parameter object”.

BO does not run dynamic params through the report as would happen without BusinessObjects (BO) or Crystal Reports Server (CRS). When you publish a report with dynamic parameters to BO/CRS, the prompt is published to the repository so that it can be accessed through the Business View Manager (which can be installed as part of the client tools). In order for this to work a couple of things need to happen:
1. You need to be sure that you check the "Update Repository" box on the Save As screen the first time you publish the report.
2. Your BO/CRS user needs to have "view" access to the Crystal2013ReportApplicationServer in the Servers section in the CMC - in fact, the Everyone group should be given view access to the server in order for dynamic prompts to work correctly.
3. In the Business View Manager, the Administrator user needs to give your user, or, even better, a Crystal Developers group full control access to the "Dynamic Cascading Prompts" folder.
Best practice for dynamic prompts in a BO/CRS environment is to actually create the prompts in the Business View Manager. This will allow you to create a single data connection that can be reused and also create lists of values such that the same list or prompt can be reused by multiple reports. If you just create the prompts in Crystal, you will end up with multiple data connections to the same database, the prompts will use the whole query for the reports to get the dynamic values instead of just a focused query to the lookup table that contains the values, and there ends up being lots of duplication and chaos.
-Dell

Try catch implementation in dynamic query

I am fetching values by dynamic selection (select a,b,..from (var)...) .
Eveytime if I am selecting garbage value of var it will throw dump . Can u tell me how we implement try catch method / exception handling method so that I can avoid dump in dynamic query
Appropriate answer will rewarded with points that is for sure .

Here is the usage of th try statements ...
PARAMETERS number TYPE i.
DATA: result TYPE p LENGTH 8 DECIMALS 2,
      oref   TYPE REF TO cx_root,
      text   TYPE string.
TRY.
    IF ABS( number ) > 100.
      RAISE EXCEPTION TYPE cx_demo_abs_too_large.
    ENDIF.
    PERFORM calculation USING    number
                      CHANGING result
                               text.
CATCH cx_sy_arithmetic_error INTO oref.
    text = oref->get_text( ).
CATCH cx_root INTO oref.
    text = oref->get_text( ).
ENDTRY.
IF NOT text IS INITIAL.
WRITE / text.
ENDIF.
WRITE: / 'Final result:', result.
FORM calculation USING    p_number LIKE number
                 CHANGING p_result LIKE result
                          p_text   LIKE text
                          RAISING cx_sy_arithmetic_error.
DATA l_oref TYPE REF TO cx_root.
TRY.
      p_result = 1 / p_number.
      WRITE: / 'Result of division:', p_result.
      p_result = SQRT( p_number ).
      WRITE: / 'Result of square root:', p_result.
    CATCH cx_sy_zerodivide INTO l_oref.
      p_text = l_oref->get_text( ).
    CLEANUP.
      CLEAR p_result.
ENDTRY.
ENDFORM.
<b>please see this link for detailed explaination of the TRY & ENDTRY ...</b>
<a href="http://">http://help.sap.com/saphelp_nw04/helpdata/en/a9/b8eef8fe9411d4b2ee0050dadfb92b/content.htm</a>
reward points if it is usefull......
Girish

RAISERROR with Try/Catch does not exit after exception in catch block

I am trying to propogate an error from within my proc out to the caller.
In the attached example I have 2 sets of try catch blocks.
I raiserror in the first
catch the error and then raiserror again. (I expect to exit)
I do not expect :
to get to print 'post test'
to get to second try block.
but this does not exit, instead the code flows as per 2 runs.
I do not understand the reason for the flows, as it seems counterintuitive to be raising an error but then still print following exceptions. I cannot seem to find any references that explains this behaviour.
running tests together results
print '-------------------------------------------------------'
print 'test 15'
exec test_raiseerror 15
print '-------------------------------------------------------'
print 'test 16'
exec test_raiseerror 16
print '-------------------------------------------------------'
print 'test 17'
exec test_raiseerror 17
print '-------------------------------------------------------'
print 'test 18'
exec test_raiseerror 18
print '-------------------------------------------------------'
'RESULTS'
test 15
error number provided: 15
Msg 50000, Level 15, State 1, Procedure test_raiseerror, Line 21
name hello 15
post test
15
Msg 50000, Level 15, State 1, Procedure test_raiseerror, Line 37
name hello 2 15
post test2
test 16
error number provided: 16
Msg 50000, Level 16, State 1, Procedure test_raiseerror, Line 21
name hello 16
post test
16
Msg 50000, Level 16, State 1, Procedure test_raiseerror, Line 37
name hello 2 16
post test2
test 17
error number provided: 17
post test
17
post test2
test 18
error number provided: 18
post test
18
post test2
Msg 50000, Level 17, State 1, Procedure test_raiseerror, Line 21
name hello 17
Msg 50000, Level 17, State 1, Procedure test_raiseerror, Line 37
name hello 2 17
Msg 50000, Level 18, State 1, Procedure test_raiseerror, Line 21
name hello 18
Msg 50000, Level 18, State 1, Procedure test_raiseerror, Line 37
name hello 2 18
run tests seperately
exec test_raiseerror 15
error number provided: 15
RESULTS 15
Msg 50000, Level 15, State 1, Procedure test_raiseerror, Line 21
name hello 15
post test
15
Msg 50000, Level 15, State 1, Procedure test_raiseerror, Line 37
name hello 2 15
post test2
exec test_raiseerror 16
RESULTS 16
error number provided: 16
Msg 50000, Level 16, State 1, Procedure test_raiseerror, Line 21
name hello 16
post test
16
Msg 50000, Level 16, State 1, Procedure test_raiseerror, Line 37
name hello 2 16
post test2
exec test_raiseerror 17
RESULTS 17
error number provided: 17
post test
17
post test2
Msg 50000, Level 17, State 1, Procedure test_raiseerror, Line 21
name hello 17
Msg 50000, Level 17, State 1, Procedure test_raiseerror, Line 37
name hello 2 17
exec test_raiseerror 18
RESULTS 18
error number provided: 18
post test
18
post test2
Msg 50000, Level 18, State 1, Procedure test_raiseerror, Line 21
name hello 18
Msg 50000, Level 18, State 1, Procedure test_raiseerror, Line 37
name hello 2 18
CODEBLOCK:
if object_id('test_raiseerror','P') is not null
drop proc test_raiseerror
go
create proc test_raiseerror(@id as int) as
begin
begin try
declare @name varchar(20)
select @name = 'hello'
raiserror('name %s %d',@id,1,@name,@id)
print 'next'
end try
begin catch
declare @errormessage nvarchar(4000)
declare @errornum int
select @errormessage = error_message()
, @errornum = error_severity()
print 'error number provided: ' + convert(varchar(2),@errornum)
raiserror(@errormessage, @errornum,1)
print 'post test'
end catch
begin try
select @name = 'hello 2'
raiserror('name %s %d', @id,1,@name, @id)
end try
begin catch
select @errormessage = error_message()
, @errornum = error_severity()
print @errornum
raiserror(@errormessage, @errornum,1)
print 'post test2'
end catch
end
go
sqlserver 2008 & 2008 R2

There is a Connect that describes a similiar complaint. But basically a raiserror inside a catch block does not terminate the procedure, it will continue with any additional code in the CATCH and FINALLY unless it hits a return statement.
http://connect.microsoft.com/SQLServer/feedback/details/275308/have-raiserror-work-with-xact-abort

How to accept 2 strings in a class with try catch method..help!!

the program below will accept two strings and compare str1 and str2 if equal. this program uses functions. can any one help me with this?
import java.io.*;
public class StrCompare {
     private BufferedReader takyoin = null;
     //private BufferedReader intakyo = null;
     * @param args
     public StrCompare(){
          takyoin = new BufferedReader(new InputStreamReader(System.in));
          //intakyo = new BufferedReader(new InputStreamReader(System.in));
     public String UserInput(){
     public static void main(String[] args) {
          // TODO Auto-generated method stub
}

What are you talking about? There is no such thing as "try-catch-methods", and there are no functions but methods.
Strings by the way have their own means of comparision. Apart from that: do your own homework.

Dynamic order by with updateable report

I have a region of type sql query (updateable report)
I want to add a dynamic order by clause based on the value of a page item
ie order by nvl(:PX_ORDER, 1)
I can get the dynamic ordering to work using the 'function returning sql query' reqion type but having a little problem with the sql query type above.
nb. Have also tried ORDER BY decode(:PX_ORDER, 2, 2, 1) but no luck.

Thanks Vikas,
I was using column numbers in the decode. Needed to specify the actual column_name including any "" surrounding it.
decode(:PX_ORDER, 2, "COL2_NAME", "COL1_NAME")
works
any ideas on how to dynamically flip the ASC, DESC ordering in a SQL statement?? The 'ASK TOM' note you mentioned above states you should use dynamic query strings if this functionality is required.
Unfortunately updateable report regions can't be created using dynamic query strings.

Please help with try/catch

Hello, I'm writing a program and I got surprised with the following. I've got the following try/catch block:
try {
String param = config.getConfigValue("db2.driver");
if (param == null)
// parameter not defined.
throw new Exception("Parameter 'db2.driver' missing!");
else
Class.forName(param);
catch (SQLException sqlEx) {
// do something
catch (Exception e) {
System.out.println("*** ERROR loading driver..."); (1)
finally {
releaseDB2Resources();
I know the program flow goes through the finally block, but it doesn't print the message (1). Why is that? I don't understand it. What am I doing wrong?
Thanks in advance.

A finally block always gets executed, so that's why the println always works there. The only reason why the println in the catch wouldn't work is if that exception wasn't thrown. If a config value is not there, it might be the null string "" instead of null. Try this:
if (param.equals(""))
throw new Exception("blah");
You could also try:
if (true)
throw new Exception("blah");
to make sure that the exception is caught where you think it should be.

Surround With Try/Catch : comments issue

hi
Please consider this code:
     public static void main(String[] pArguments)
          FileInputStream vFileInputStream = new FileInputStream("someFile.txt");
          // some comments, e.g. several lines of commented code (that might be uncommented later)
     }It is possible to have JDeveloper "Surround With Try/Catch" this, but that results in this code:
     public static void main(String[] pArguments)
          FileInputStream vFileInputStream;
          // some comments, e.g. several lines of commented code (that might be uncommented later)
          try
               vFileInputStream = new FileInputStream("someFile.txt");
          catch (FileNotFoundException e)
               // TODO
     }Note that the declaration is before the comments and the try block starts after the comments.
Is this intentional behaviour? I would prefer to leave the comments where they are, after the (modified) code.
many thanks
Jan Vervecken

Thanks for your reply John.
I tried the right-click "Surround With..." > "try-catch" approach you suggest, and I get this code:
     public static void main(String[] pArguments)
          try
               FileInputStream vFileInputStream = new FileInputStream("someFile.txt");
          catch (FileNotFoundException e)
          // some comments, e.g. several lines of commented code (that might be uncommented later)
}Indeed, the try-block starts before the comments.
There is another difference with this approach, the declaration is not separated from the assignment.
Next ... I'll try to remember which approach give which result. :)
regards
Jan

Problem with a Try/catch exception

Hello everyone here on the forums. I'm brand new to Java and have a bit of a problem with a try catch statement I'm making. In the following code if a user enters a non-integer number the program will display "Sorry, incompatible data." Problem is it gets caught in a loop and continues to display "Sorry, incompatible data." My aim with the try catch was if the user is not quite smart enough to understand quadratic programs don't use symbols and characters it would state it isn't correct and continue running the program.
Heres my code thus far:
package finishedquadraticprogram;
import java.util.*;
* @author Matt
public class quad {
     * @param args the command line arguments
    public static void main(String[] args) {
        boolean verification = true;
        double a, b, c, root1, root2, discriminant;
        Scanner keyInput = new Scanner(System.in);
        while ( verification)
        try
        System.out.println("a: ");
        a = keyInput.nextDouble();
        System.out.println("b: ");
        b = keyInput.nextDouble();
        System.out.println("c: ");
        c = keyInput.nextDouble();
        discriminant = Math.sqrt(b * b - 4 * a * c);
        root1 = (-b + discriminant) / 2 * a;
        root2 = (-b - discriminant) / 2 * a;
        verification = false;
        System.out.println("Root 1 = " +root1+ "\nRoot 2 = " +root2);
        } //try
        catch (InputMismatchException iMe)
          System.out.println( "Sorry. incompatible data." );
}I'm pretty sure the problem is something to do with the keyboard buffer, but I'm not sure what I need to do to either reset it or clear it, whichever one works. (Oh, and how would I go about making the program use complex numbers? I realize Java can't use complex numbers and will just display NaN ... any ideas how to make this work?)
Thanks a lot for all of your help guys, it's appreciated.

this is better:
package finishedquadraticprogram;
import java.util.*;
/** @author Matt */
public class quad
   private static final double TOLERANCE = 1.0e-9;
   /** @param args the command line arguments */
   public static void main(String[] args)
      boolean verification = true;
      double a, b, c, root1, root2, discriminant;
      Scanner keyInput = new Scanner(System.in);
      while (verification)
         try
            System.out.println("a: ");
            a = keyInput.nextDouble();
            System.out.println("b: ");
            b = keyInput.nextDouble();
            System.out.println("c: ");
            c = keyInput.nextDouble();
            discriminant = Math.sqrt(b * b - 4 * a * c);
            if (Math.abs(a) < TOLERANCE)
               root1 = 0.0;
               root2 = -c/b;
            else
               root1 = (-b + discriminant) / (2 * a);
               root2 = (-b - discriminant) / (2 * a);
            verification = false;
            System.out.println("Root 1 = " + root1 + "\nRoot 2 = " + root2);
         } //try
         catch (InputMismatchException iMe)
            System.out.println("Sorry. incompatible data.");
            keyInput.next();
}

Need HELP with finally() in nested try-catch

hi,
i am having trouble with deadlock and wondering if its due to an incorrect use of finally nested within multiple try catch blocks.
is the inner finally() required, will the outer one get executed, or will the two finally() statements get executed...??
the deadlock happens very infrequently to accurately test.
try {
     try {
     catch (InterruptedException e) {
          return;
catch {
finally {
     //will this be executed be executed by the inner throw statement
}or is an inner finally required
try {
     try {
     catch (InterruptedException e) {
          return;
     //this finally is NEW....is it needed!
     finally {
          //will this be executed. will both get executed
catch {
finally {
     //will this be executed also, or completely ignored if exception throw from inner try/catch
}

inner/outer, which one is executed first?
more info pls.I mean, really. How hard is it to find out for yourself?
public class TestFinally {
    public static void main(String[] args) {
        try {
            try {
                throw new RuntimeException("Whatever");
            } finally {
                System.out.println("Inner finally");
        } finally {
            System.out.println("Outer finally");
}I'll leave it to your imagination as to how to modify this class to confirm the answers to your original question.

Exception handling with try/catch in acrobat

Hi
I have a problem using a try/catch block in my acrobat document-script. Try to enter the following into the debugger-console:
try{nonexistentFunction();}catch(e){console.println('\nacrobat can't catch')}
and run it. The output will be:
nonexistentFunction is not defined
1:Console:Exec
acrobat can't catch
true
The whole point of a rty/catch block is for the application NOT to throw an exception, but instead execute the catch-part of the statement. However, acrobat does both: It throws an exception AND executes the catch-block.
Is there another way to suppress the exception, or to make the try/catch-block work as it's supposed to?

> Also Adobe provides for free the JS or compiled file for Acrobat Reader to support the JS console.
Where is that file located ? How to install it or where to place it ?
What is the method referred by try67 on his site where he sells a product ?
Is that the same as the compiled file you refer to ? or did he sell his solution to adobe ?
It is helpful if people can get an idea of the nature of choices available and make informed decisions, than a cloak and dagger approach.
For some jobs that we have, I have been very frustrated by a consultant who wont even give basic info for transparent billing despite all assurances for privacy, as a result we are forced to do the job ourselves.
Dying Vet

Dynamic Order by with user defined Where clause...

Hello!
I have a block based on a table, with no order by set and no where clause.
The block is queryable so users can filter the data to be retrieved.
Each of the columns on the form have a button above which requeries the block, applying the order by (SET_BLOCK_PROPERTY ( 'B12', ORDER_BY, :bc1.h_b12_custom_orderby ); )
The problem is that each time the block is requeried the user definied filter criteria is lost. Is there any way I can get a handle on this and maintain the filtering?
GET_BLOCK_PROPERTY(item, DEFAULT_WHERE); only retrieves the query entered while in design mode so this won't work.
I'm using Oracle Forms 6i, web based. Any suggestions are very much appreciated.
Thanks in advance,
Jay

Many thanks for your response Hedy,
Below is the procedure I used to achieve this.
I found GET_BLOCK_PROPERTY ( p_block, LAST_QUERY ) worked better than :SYSTEM.last_query. As the first time it is called within a block :SYSTEM.last_query returned the query made in another block - which I'm sure has it's applications.
Thanks again,
Jay
PROCEDURE set_last_query_where ( p_block IN VARCHAR2
, p_where IN VARCHAR2 DEFAULT NULL )IS
l_last_query VARCHAR2(10000);
l_last_where VARCHAR2(10000);
BEGIN
IF p_where IS NULL THEN
l_last_query := UPPER(GET_BLOCK_PROPERTY ( p_block, LAST_QUERY ));
l_last_where := SUBSTR ( UPPER ( l_last_query),
INSTR ( l_last_query, 'WHERE')+6, INSTR(SUBSTR(UPPER(l_last_query), INSTR(l_last_query, 'WHERE')+8), 'ORDER BY'));
ELSE
l_last_where := p_where;
END IF;
SET_BLOCK_PROPERTY ( p_block, DEFAULT_WHERE, l_last_where );
EXCEPTION
     WHEN FORM_TRIGGER_FAILURE THEN
     ref_raise_ftf;
     WHEN OTHERS THEN
     ref_others( 'P-SLQW' );
END;

Weird thing with try-catch

Hey everyone, I have a problem compiling this .java
import java.io.*;
public class lector
    public static void main (String args[])
    public void lector()
        listapersonas listap = new listapersonas();
        listaconocidos listac = new listaconocidos();
        String linea, per, con;
        persona nuevapersona,actual,nuevoconocido;
        BufferedReader texto = new BufferedReader(new FileReader("conocidos.txt"));
        linea="";
        try {
        while ((linea=texto.readLine())!=null)
            per = linea.substring(0,linea.indexOf(','));
            con = linea.substring(linea.indexOf(','));
            nuevapersona = new persona(per);
            nuevoconocido = new persona(con);
            if (listap.existe(per)==false)
                nuevapersona.conocidos.agregar(nuevoconocido);
                listap.agregar(nuevapersona);
                linea=texto.readLine();
                continue;
            if (listap.existe(per)==true)
                if (listac.existe(con)==false)
                    listac.agregar(nuevoconocido);
                else
                    linea=texto.readLine();
                    continue;
            else
                linea=texto.readLine();
                continue;
        } //while
        } //try
        catch (java.io.* e)
            System.out.print("Imposible leer el archivo");
        } //catch
    } //lector
} // classWell what it is supposed to do is read a string from a file and then transform and add them to a linked list.
The problem is that when I compile there is an error message called "<identifier> expected" and points to the catch block. Please help me

Nothing weird about it at all.
That's not the syntax of a catch block. What you've written there will only work in an import statement.
What you probably mean to catch is java.io.IOException.

TRY CATCH with dynamic ORDER BY

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