Answer / senthil

Error handling means if our stored procedure generates any error while running,we can handle that error.So that it will not show the error.

For eg.

insert into emp(sno,name,age) values(10,'Vasanth',26);

Consider field "sno" is primary key.When we are giving duplicate input to the sno it will show the error.

If you dont want to show the error ,you can capture the error and display as below.

BEGIN TRY
insert into emp(sno,name,age) values(10,'Vasanth',26);

END TRY

BEGIN CATCH
SELECT @err = @@error
IF @err <> 0
BEGIN
RETURN @err
END
END CATCH

Here in this case,it will capture the error and display.

Answer / saraswathi muthuraman

If the procedure execution fails the oracle will quit the
execution with an error.

This error can be handled with in store procedure using
"exception".

declare
test_excep_name exception;
x number;
Begin
select emp_no into x from emp_test where emp_no=1;
If SQL%NOTFOUND then
raise test_excep_name;
end if;

exception
when test_excep_name then
dbms_output.put_line(' Error occurred during execution' || '
SQL error code is ' || sqlcode || ' SQL error maessage '||
sqlerrm);
when others then
dbms_output.put_line(' Error occurred during execution- This
is unknown error ' || ' SQL error code is ' || sqlcode || '
SQL error maessage '|| sqlerrm);
end;
/

Result :

Error occurred during execution- This is unknown error SQL
error code is 100
SQL error maessage ORA-01403: no data found

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