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Raise Error In Oracle Stored Procedure

But when the handler completes, the block is terminated. Passing the value of 'True' adds the error to the current stack, while the default is 'False'. What does the word "most" mean? You can pass an error number to SQLERRM, in which case SQLERRM returns the message associated with that error number. this contact form

ORA-20001: Duplicate president customer excetpion Process exited. WHEN sal_high THEN 13. Example 11-25 uses the preceding technique to retry a transaction whose INSERT statement raises the predefined exception DUP_VAL_ON_INDEX if the value of res_name is not unique. For example, if you declare an exception named invalid_number and then PL/SQL raises the predefined exception INVALID_NUMBER internally, a handler written for INVALID_NUMBER will not catch the internal exception.

Redeclaring Predefined Exceptions Remember, PL/SQL declares predefined exceptions globally in package STANDARD, so you need not declare them yourself. Example 10-11 Displaying SQLCODE and SQLERRM CREATE TABLE errors (code NUMBER, message VARCHAR2(64), happened TIMESTAMP); DECLARE name employees.last_name%TYPE; v_code NUMBER; v_errm VARCHAR2(64); BEGIN SELECT last_name INTO name FROM employees WHERE employee_id IF ... 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.

Exceptions cannot propagate across remote procedure calls done through database links. The inner block has an exception handler for A, so A does not propagate. Using the DBMS_WARNING Package If you are writing a development environment that compiles PL/SQL subprograms, you can control PL/SQL warning messages by calling subprograms in the DBMS_WARNING package. Example 11-11 Reraising Exception DECLARE salary_too_high EXCEPTION; current_salary NUMBER := 20000; max_salary NUMBER := 10000; erroneous_salary NUMBER; BEGIN BEGIN IF current_salary > max_salary THEN RAISE salary_too_high; -- raise exception END IF;

Following is the simple syntax of raising an exception: DECLARE exception_name EXCEPTION; BEGIN IF condition THEN RAISE exception_name; END IF; EXCEPTION WHEN exception_name THEN statement; END; You can use above syntax 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 system. DECLARE pe_ratio NUMBER(3,1); BEGIN SELECT price / earnings INTO pe_ratio FROM stocks WHERE symbol = 'XYZ'; -- might cause division-by-zero error INSERT INTO stats (symbol, ratio) VALUES ('XYZ', pe_ratio); COMMIT; EXCEPTION This stops normal execution of the block and transfers control to the exception handlers.

If you want two or more exceptions to execute the same sequence of statements, list the exception names in the WHEN clause, separating them by the keyword OR, as follows: EXCEPTION Join them; it only takes a minute: Sign up how to catch error in procedure that was raised inside other procedure , oracle SQL 10g up vote -3 down vote favorite TOO_MANY_ROWS 01422 -1422 It is raised when s SELECT INTO statement returns more than one row. This parameter can be set at the system level or the session level.

For details, see "Raising Exceptions Explicitly". LOOP -- could be FOR i IN 1..10 LOOP to allow ten tries BEGIN -- sub-block begins SAVEPOINT start_transaction; -- mark a savepoint /* Remove rows from a table of survey The exception handler cannot transfer control back to its own block. To work with PL/SQL warning messages, you use the PLSQL_WARNINGS initialization parameter, the DBMS_WARNING package, and the USER/DBA/ALL_PLSQL_OBJECT_SETTINGS views.

You declare an exception by introducing its name, followed by the keyword EXCEPTION. weblink For user-defined exceptions, SQLCODE returns +1 and SQLERRM returns the message User-Defined Exception unless you used the pragma EXCEPTION_INIT to associate the exception name with an Oracle error number, in which Example 10-6 Using RAISE to Force a User-Defined Exception DECLARE out_of_stock EXCEPTION; number_on_hand NUMBER := 0; BEGIN IF number_on_hand < 1 THEN RAISE out_of_stock; -- raise an exception that we defined Some common internal exceptions have predefined names, such as ZERO_DIVIDE and STORAGE_ERROR.

DECLARE stock_price NUMBER := 9.73; net_earnings NUMBER := 0; pe_ratio NUMBER; BEGIN pe_ratio := CASE net_earnings WHEN 0 THEN NULL ELSE stock_price / net_earnings end; END; / Guidelines for Avoiding and Whenever possible, write exception handlers for named exceptions instead of using OTHERS exception handlers. END IF; 11. http://lebloggeek.com/raise-error/raise-error-vb-net.html Guidelines for Avoiding and Handling Exceptions To make your programs as reliable and safe as possible: Use both error-checking code and exception handlers.

DUP_VAL_ON_INDEX 00001 -1 It is raised when duplicate values are attempted to be stored in a column with unique index. For example, you might declare an exception named insufficient_funds to flag overdrawn bank accounts. Two minor issues on raise_application_error thought: 1) the size of 2nd parameter is limited to 2048 bytes and 2) I'd prefer 3rd parameter to be true (instead of default false) to

To retrieve the message associated with the exception, the exception handler in the anonymous block invokes the SQLERRM function, described in "Error Code and Error Message Retrieval".

This chapter discusses the following topics: Overview of PL/SQL Error Handling Advantages of PL/SQL Exceptions Predefined PL/SQL Exceptions Defining Your Own PL/SQL Exceptions How PL/SQL Exceptions Are Raised How PL/SQL Exceptions Handling Exceptions Raised in Handlers Only one exception at a time can be active in the exception-handling part of a block or subprogram. In PL/SQL, the pragma EXCEPTION_INIT tells the compiler to associate an exception name with an Oracle error number. If the exception is ever raised in that block (or any sub-block), you can be sure it will be handled.

Browse other questions tagged sql oracle stored-procedures plsql or ask your own question. Linked 2 Oracle SQL Trigger insert new records based on a insert column value 0 PL/SQL exception/goto/loop 2 Oracle equivalent for MySQL code “insert into dummy” to return error message 1 To call RAISE_APPLICATION_ERROR, use the syntax raise_application_error( error_number, message[, {TRUE | FALSE}]); where error_number is a negative integer in the range -20000 .. -20999 and message is a character string up his comment is here In the exception-handling part of the sub-block, put an exception handler that rolls back to the savepoint and then tries to correct the problem.

permission_denied EXCEPTION; 5. Scope Rules for PL/SQL Exceptions You cannot declare an exception twice in the same block. For example, a better way to do the insert follows: INSERT INTO stats (symbol, ratio) SELECT symbol, DECODE(earnings, 0, NULL, price / earnings) FROM stocks WHERE symbol = 'XYZ'; In this Isolating error-handling routines makes the rest of the program easier to read and understand.

share|improve this answer answered May 16 '11 at 16:39 Justin Cave 160k14204250 1 Precisely what I need! Example 11-8 Redeclared Predefined Identifier DROP TABLE t; CREATE TABLE t (c NUMBER); In the following block, the INSERT statement implicitly raises the predefined exception INVALID_NUMBER, which the exception handler handles. With some better error checking, we could have avoided the exception entirely, by substituting a null for the answer if the denominator was zero, as shown in the following example. Thus, a block or subprogram can have only one OTHERS handler.

You can avoid unhandled exceptions by coding an OTHERS handler at the topmost level of every PL/SQL program. LOGIN_DENIED 01017 -1017 It is raised when s program attempts to log on to the database with an invalid username or password. If you neglect to code a check, the error goes undetected and is likely to cause other, seemingly unrelated errors. For example, the predefined exception NO_DATA_FOUND is raised when a SELECT INTO statement returns no rows.

The latter are called exceptions. For more information about PL/SQL units and compiler parameters, see "PL/SQL Units and Compilation Parameters". Each handler consists of a WHEN clause, which specifies an exception, followed by a sequence of statements to be executed when that exception is raised. 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

For example, when your program selects a column value into a character variable, if the value is longer than the declared length of the variable, PL/SQL aborts the assignment and raises Error numbers are defined between -20,000 and -20,999. When an exception is reraised, the first block searched is the enclosing block, not the current block. Redeclaring Predefined Exceptions Remember, PL/SQL declares predefined exceptions globally in package STANDARD, so you need not declare them yourself.