For simplicitys sake in the code block below I am simply outputting the exception code and error message to the console. Before starting the transaction, mark a savepoint. Note: When using pragma RESTRICT_REFERENCES to assert the purity of a stored function, you cannot specify the constraints WNPS and RNPS if the function calls SQLCODE or SQLERRM. Example 11-19 is like Example 11-17 except that an enclosing block handles the exception that the exception handler in the inner block raises. this page
This avoids compilation errors. Example Since EXCEPTION HANDLING is usually written with the following syntax: EXCEPTION WHEN exception_name1 THEN [statements] WHEN exception_name2 THEN [statements] WHEN exception_name_n THEN [statements] WHEN OTHERS THEN [statements] END [procedure_name]; You For internal exceptions, SQLCODE returns the number of the associated Oracle error. Every Oracle error has a number, but exceptions must be handled by name. Visit Website
PROGRAM_ERROR ORA-06501 -6501 PL/SQL has an internal problem. PROGRAM_ERROR PL/SQL has an internal problem. The error number and message can be trapped like any Oracle error.
Therefore, the RAISE statement and the WHEN clause refer to different exceptions. END; You can still handle an exception for a statement, then continue with the next statement. In such cases, you must use dot notation to specify the predefined exception, as follows: EXCEPTION WHEN invalid_number OR STANDARD.INVALID_NUMBER THEN -- handle the error END; How PL/SQL Exceptions Are Raised But, if the need arises, you can use a locator variable to track statement execution, as follows: DECLARE stmt INTEGER := 1; -- designates 1st SELECT statement BEGIN SELECT ...
Home Book List Contents Index Master Index Feedback Go to main content 18/99 The script content on this page is for navigation purposes only and does not alter the content in Example 4-4 ttIsql show errors command Again consider Example 2-17. END; In this example, if the SELECT INTO statement raises a ZERO_DIVIDE exception, the local handler catches it and sets pe_ratio to zero. Example 11-18 Exception Raised in Exception Handler is Handled by Invoker CREATE PROCEDURE print_reciprocal (n NUMBER) AUTHID DEFINER IS BEGIN DBMS_OUTPUT.PUT_LINE(1/n); EXCEPTION WHEN ZERO_DIVIDE THEN DBMS_OUTPUT.PUT_LINE('Error:'); DBMS_OUTPUT.PUT_LINE(1/n || ' is undefined');
But when the handler completes, the block is terminated. Controlling PL/SQL Warning Messages To let the database issue warning messages during PL/SQL compilation, you set the initialization parameter PLSQL_WARNINGS. pe_ratio := stock_price / net_earnings; DBMS_OUTPUT.PUT_LINE('Price/earnings ratio = ' || pe_ratio); EXCEPTION -- exception handlers begin -- Only one of the WHEN blocks is executed. See Also: Example 12-13, where a bulk SQL operation continues despite exceptions Retrying Transactions After Handling Exceptions To retry a transaction after handling an exception that it raised, use this technique:
Example 11-17 Exception Raised in Exception Handler is Not Handled CREATE PROCEDURE print_reciprocal (n NUMBER) AUTHID DEFINER IS BEGIN DBMS_OUTPUT.PUT_LINE(1/n); -- handled EXCEPTION WHEN ZERO_DIVIDE THEN DBMS_OUTPUT.PUT_LINE('Error:'); DBMS_OUTPUT.PUT_LINE(1/n || ' is http://docs.oracle.com/cd/B19306_01/appdev.102/b14261/sqlerrm_function.htm You declare an exception by introducing its name, followed by the keyword EXCEPTION. You can write handlers for predefined exceptions using the names in the following table: Exception ORA Error SQLCODE Raise When ... This uses less code and preserves the real line number of the error. –Jon Heller Sep 8 '12 at 4:17 add a comment| 1 Answer 1 active oldest votes up vote
Declaring PL/SQL Exceptions Exceptions can be declared only in the declarative part of a PL/SQL block, subprogram, or package. this website However, an exception name can appear only once in the exception-handling part of a PL/SQL block or subprogram. If there is no enclosing block, control returns to the host environment. TimesTen error messages and SQL codes Given the same error condition, TimesTen does not guarantee that the error message returned by TimesTen is the same as the message returned by Oracle
The result is equivalent in Oracle Database, with the SELECT results showing no rows. Error: 1/0 is undefined Unhandled Exceptions If there is no handler for a raised exception, PL/SQL returns an unhandled exception error to the invoker or host environment, which determines the outcome. Figure 11-2 Exception Propagates from Inner Block to Outer Block Description of "Figure 11-2 Exception Propagates from Inner Block to Outer Block" In Figure 11-3, the inner block raises exception C. Get More Info SYS_INVALID_ROWID ORA-01410 The conversion of a character string into a universal rowid fails because the character string does not represent a valid rowid.
The outer block does not have an exception handler for C, so PL/SQL returns an unhandled exception error to the host environment. For more information, see "User-Defined Exceptions". This function should only be used within the Exception Handling section of your code.
You can find the value of this parameter by issuing SHOW PARAMETER USER_DUMP_DEST. Place the statement in its own sub-block with its own exception handlers. Now consider a TimesTen example where the exception is not handled, again run with autocommit disabled: create table mytable (num int not null primary key); set serveroutput on insert into mytable For internal exceptions, SQLCODE returns the number of the Oracle error.
Usenet source: Ken Quirici (c.d.o.server - 29-Oct-2004) Basic Exception Handling With Error Basic Block Structure Handling CREATE OR REPLACE PROCEDURE
could you explain why I dont need the declare statement in this case (where as all the examples I saw have the declare statement)? –n00b Sep 8 '12 at 3:08 2 SELF_IS_NULL ORA-30625 -30625 Program attempted to invoke a MEMBER method, but the object was not initialized. From there on, the exception propagates normally. An error message causes the compilation to fail.
Raising Exceptions Explicitly To raise an exception explicitly, use either the RAISE statement or RAISE_APPLICATION_ERROR procedure.