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ORACLE PL/SQL create or replace stored procedure up vote 8 down vote favorite 1 I have a PL/SQL stored procedure inside which I want to run several updates, then capture any exceptions and return them in an out parameter. For simplicitys sake in the code block below I am simply outputting the exception code and error message to the console. However, the code block below does not work
Functions For Error Trapping Are Contained In Which Section Of A Pl/sql Block
(I am experiencing a "found / expecting" syntax error) CREATE OR REPLACE PROCEDURE DBP.TESTING_SP AS DECLARE v_code NUMBER; v_errm VARCHAR2(64); BEGIN UPDATE PS_NE_PHONE_TBL SET NE_PHONE_TYPE = 'TEST' WHERE NEMPLID_TBL = 'N14924'; EXCEPTION WHEN OTHERS THEN v_code := SQLCODE; v_errm := SUBSTR(SQLERRM, 1, 64); DBMS_OUTPUT.PUT_LINE (v_code || ' ' || v_errm); END TESTING_SP; / What is the correct syntax for what I am trying to do? I read on one forum "When using the Create or Replace syntax, you can not use Declare. Declare is only for anonymous blocks that are not named. So either remove line 1 and create an anonymous block, or remove line 2 and create a named procedure." but I'm not sure how to create an anonymous block or create a named procedure to accomplish what I want to do (if that, indeed, is the 'solution'). Could somebody lend a hand? oracle stored-procedures plsql share|improve this question edited Sep 8 '12 at 2:56 asked Sep 8 '12 at 2:48 n00b 1,26821544 Unless you are are doing something useful with the exception information, there is no need to catch it. The best way to pass exception information to the calling function is to do nothing, and let the exception natura
to your PL/SQL program. With many programming languages, unless you disable error checking, a run-time error such as stack overflow or division by zero stops normal processing and returns control to the operating oracle sqlcode list system. With PL/SQL, a mechanism called exception handling lets you bulletproof your program so
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that it can continue operating in the presence of errors. This chapter contains these topics: Overview of PL/SQL Runtime Error sqlerrm line number Handling Advantages of PL/SQL Exceptions Summary of Predefined PL/SQL Exceptions Defining Your Own PL/SQL Exceptions How PL/SQL Exceptions Are Raised How PL/SQL Exceptions Propagate Reraising a PL/SQL Exception Handling Raised PL/SQL Exceptions Overview of http://stackoverflow.com/questions/12327643/how-to-catch-and-return-or-print-an-exception-in-an-oracle-pl-sql-create-or-re PL/SQL Compile-Time Warnings Overview of PL/SQL Runtime Error Handling In PL/SQL, an error condition is called an exception. Exceptions can be internally defined (by the runtime system) or user defined. Examples of internally defined exceptions include division by zero and out of memory. Some common internal exceptions have predefined names, such as ZERO_DIVIDE and STORAGE_ERROR. The other internal exceptions can be given names. You can define exceptions of https://docs.oracle.com/cd/B19306_01/appdev.102/b14261/errors.htm your own in the declarative part of any PL/SQL block, subprogram, or package. For example, you might define an exception named insufficient_funds to flag overdrawn bank accounts. Unlike internal exceptions, user-defined exceptions must be given names. When an error occurs, an exception is raised. That is, normal execution stops and control transfers to the exception-handling part of your PL/SQL block or subprogram. Internal exceptions are raised implicitly (automatically) by the run-time system. User-defined exceptions must be raised explicitly by RAISE statements, which can also raise predefined exceptions. To handle raised exceptions, you write separate routines called exception handlers. After an exception handler runs, the current block stops executing and the enclosing block resumes with the next statement. If there is no enclosing block, control returns to the host environment. For information on managing errors when using BULK COLLECT, see "Handling FORALL Exceptions with the %BULK_EXCEPTIONS Attribute". Example 10-1 calculates a price-to-earnings ratio for a company. If the company has zero earnings, the division operation raises the predefined exception ZERO_DIVIDE, the execution of the block is interrupted, and control is transferred to the exception handlers. The optional OTHERS handler catches all exceptions that the block does not name specifically. Example 10-1 Runtime Error Hand
errors. The latter are called exceptions. Note: The language of warning and error https://docs.oracle.com/cd/E11882_01/appdev.112/e25519/errors.htm messages depends on the NLS_LANGUAGE parameter. For information about this http://www.oracle.com/technetwork/testcontent/o25plsql-093886.html parameter, see Oracle Database Globalization Support Guide. Topics Compile-Time Warnings Overview of Exception Handling Internally Defined Exceptions Predefined Exceptions User-Defined Exceptions Redeclared Predefined Exceptions Raising Exceptions Explicitly Exception Propagation Unhandled Exceptions Error Code and Error Message Retrieval Continuing Execution After Handling Exceptions Retrying oracle sql Transactions After Handling Exceptions See Also: "Exception Handling in Triggers" "Handling FORALL Exceptions After FORALL Statement Completes" Tip: If you have problems creating or running PL/SQL code, check the Oracle Database trace files. The USER_DUMP_DEST initialization parameter specifies the current location of the trace files. You can find the value of this parameter print pl sql by issuing SHOW PARAMETER USER_DUMP_DEST. For more information about trace files, see Oracle Database Performance Tuning Guide. Compile-Time Warnings While compiling stored PL/SQL units, the PL/SQL compiler generates warnings for conditions that are not serious enough to cause errors and prevent compilation—for example, using a deprecated PL/SQL feature. To see warnings (and errors) generated during compilation, either query the static data dictionary view *_ERRORS (described in Oracle Database Reference) or, in the SQL*Plus environment, use the command SHOW ERRORS. The message code of a PL/SQL warning has the form PLW-nnnnn. For the message codes of all PL/SQL warnings, see Oracle Database Error Messages. Table 11-1 summarizes the categories of warnings. Table 11-1 Compile-Time Warning Categories Category Description Example SEVERE Condition might cause unexpected action or wrong results. Aliasing problems with parameters PERFORMANCE Condition might cause performance problems. Passing a VARCHAR2 value to a NUMBER column in an INSERT statement INFORMATIONAL Condition does not affect performance or correctness
TECHNOLOGY: PL/SQL Tracing Lines By Steven Feuerstein Find and report your errors—by line number—in Oracle Database 10g. PL/SQL offers a powerful and flexible exception architecture. Of course, there is always room for improvement, and in Oracle Database 10g, exception handling takes a big step forward with the introduction of the DBMS_UTILITY.FORMAT_ERROR_BACKTRACE function. This article explores the problem that this function solves and how best to use it. Who Raised That Exception? When an exception is raised, one of the most important pieces of information a programmer would like to uncover is the line of code that raised the exception. Prior to Oracle Database 10g, one could obtain this information only by allowing the exception to go unhandled. Let's revisit the error-handling behavior available to programmers in Oracle9i Database. Consider this simple chain of program calls in Listing 1: procedure proc3 calls proc2 calls proc1 , at which point proc1 raises the NO_DATA_FOUND exception. Notice that there is no error handling in any of the procedures; it is most significantly lacking in the top-level proc3 procedure. If I run proc3 in SQL*Plus, I will see the following results: ERROR at line 1: ORA-01403: no data found ORA-06512: at "SCOTT.PROC1", line 4 ORA-06512: at "SCOTT.PROC2", line 6 ORA-06512: at "SCOTT.PROC3", line 4 ORA-06512: at line 3 Code Listing 1: A stack of procedures CREATE OR REPLACE PROCEDURE proc1 IS BEGIN DBMS_OUTPUT.put_line ('running proc1'); RAISE NO_DATA_FOUND; END; / CREATE OR REPLACE PROCEDURE proc2 IS l_str VARCHAR2(30) := 'calling proc1'; BEGIN DBMS_OUTPUT.put_line (l_str); proc1; END; / CREATE OR REPLACE PROCEDURE proc3 IS BEGIN DBMS_OUTPUT.put_line ('calling proc2'); proc2; END; / This is the error trace dump of an unhandled exception, and it shows that the error was raised on line 4 of proc1. On the one hand, we should be very pleased with this behavior. Now that we have the line number, we can zoom right in on the problem code and fix it. On the other hand, we got this information by letting the exception go unhandled. In many applications, however, we work to avoid unhandled exceptions. Let's see what happens when I add an exception section to the proc3 procedure and then display the error information (the simplest form of error logging). Here is the second version of proc3 : CREATE OR REPLACE PROCEDURE proc3 IS BEGIN DBMS_OUTPUT.put_line ('calling proc2'); proc2; EXCEPTION WHEN OTHERS THEN my_putline ( DBMS_UTILITY.FORMAT_ERROR_STACK); END; / Notice that I call DBMS_UTILITY.FORMAT_ERROR_STACK , because it will return the full error message. Of course, DBMS_OUTPUT.PUT_LINE will