Raise Application Error Trigger Example
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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 oracle trigger raise application error and returns control to the operating system. With PL/SQL, a mechanism called raise application error syntax exception handling lets you bulletproof your program so that it can continue operating in the presence of errors. This
Ora 20001 Oracle Error
chapter contains these topics: Overview of PL/SQL Runtime Error 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
Ora-00604: Error Occurred At Recursive Sql Level 1
Exceptions Propagate Reraising a PL/SQL Exception Handling Raised PL/SQL Exceptions Overview of 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, pragma exception_init such as ZERO_DIVIDE and STORAGE_ERROR. The other internal exceptions can be given names. You can define exceptions of 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
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PARTITION revisited Latest Followup You Asked Tom 1. I have a procedure, ora-06512 where in I drop partitions every day and add partitions. My question is about the exception section. Do I have to give specific exception conditions to handle the erros which are possible while dropping and adding partitions, or should I leave it by just giving the when others https://docs.oracle.com/cd/B19306_01/appdev.102/b14261/errors.htm then exception, or should I leave it alone by not giving the exception section at all. what are the possible erros which can occur while trying to create a partition and trying to drop a partition. 2. The use of pragma exception init is very clear, but Why do you have to use a raise application error. Can I just use https://asktom.oracle.com/pls/apex/f?p=100:11:0::::P11_QUESTION_ID:1155066278457 a regular exception, and raise it when I require to. I dont see the specific use of raise application error. what is the advantage of raise application error over a regular exception which you declare in the exception section and use it. (the only advantage seems to be that you can assign a number(20001 to 20999) to the error.) correct me if Iam wrong. and we said... 1) A when others is almost always a BUG unless it is immediately followed by a RAISE. The point of an exception block is to catch exceptional conditions you are EXPECTING, handle them gracefully and continue. For example, lets say you have a procedure that will either INSERT a new record or UPDATE an existing one depending on whether or not it exists. You could code: begin insert into t ( columns.... ) values ( values ..... ); exception when dup_val_on_index then -- record already exists, lets update it update t set .... = .... where ....; end; Now, if that was coded: begin insert into t ( columns.... ) values ( values .
FunctionsRegular Expressions FunctionsStatistical FunctionsLinear Regression FunctionsPL SQL Data TypesPL SQL StatementsPL SQL OperatorsPL SQL ProgrammingCursorCollectionsFunction Procedure PackagesTriggerSQL PLUS Session EnvironmentSystem Tables Data DictionarySystem PackagesObject OrientedXMLLarge ObjectsTransactionUser PrivilegeRaise application error in a trigger http://www.java2s.com/Tutorial/Oracle/0560__Trigger/Raiseapplicationerrorinatriggerincaseofinvalidnewvalue.htm in case of invalid new value : NEW OLD«Trigger«Oracle PL/SQL TutorialOracle PL/SQL TutorialTriggerNEW OLDSQL> SQL> create table t ( x int ); Table created. SQL> SQL> create trigger t_trigger before insert on t for each row 2 begin 3 for x in ( select * 4 from dual raise application 5 where :new.x > 10) 6 loop 7 raise_application_error( -20001, 'check failed' ); 8 end loop; 9 end; 10 / Trigger created. SQL> show errors No errors. SQL> SQL> insert into t select 1 from all_users; 15 rows created. SQL> SQL> set autotrace traceonly statistics SQL> SQL> insert into raise application error t select 1 from all_users; 15 rows created. Statistics ---------------------------------------------------------- 16 recursive calls 15 db block gets 73 consistent gets 0 physical reads 0 redo size 924 bytes sent via SQL*Net to client 947 bytes received via SQL*Net from client 6 SQL*Net roundtrips to/from client 1 sorts (memory) 0 sorts (disk) 15 rows processed SQL> SQL> set autotrace off SQL> SQL> drop table t; Table dropped. SQL> SQL> SQL> 28.3.NEW OLD28.3.1.Old and new value28.3.2.Reference new value with :NEW in a before insert or update trigger28.3.3.Refernece an old value in :OLD after update trigger28.3.4.:old and :new Pseudo-records, Example 128.3.5.:old and :new Pseudo-records, Example 228.3.6.Raise application error in a trigger in case of invalid new value28.3.7.REFERENCING OLD AS old NEW AS new28.3.8.REFERENCING OLD AS old_values NEW AS new_values28.3.9.Output new and old value in a before update triggerjava2s.com |Email:info at java2s.com|© Demo Source and Support. All rights reserved.