Create A Customized Error Message In Pl Sql
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Churchill Run-time errors arise from design faults, coding mistakes, hardware failures, and many other sources. Although you cannot anticipate all possible errors, you can plan to handle certain pl sql exception error message kinds of errors meaningful to your PL/SQL program. With many programming languages, unless oracle pl sql exception error message you disable error checking, a run-time error such as stack overflow or division by zero stops normal processing and pl sql developer blank error message returns control to the operating system. With PL/SQL, a mechanism called exception handling lets you "bulletproof" your program so that it can continue operating in the presence of errors. This chapter discusses t sql error message 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 Propagate Reraising a PL/SQL Exception Handling Raised PL/SQL Exceptions Tips for Handling PL/SQL Errors Overview of PL/SQL Error Handling In PL/SQL, a warning or error condition is called an exception. Exceptions can be internally defined (by the
Oracle Sql Error Message Sqlerrm
run-time 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 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. In the example below, you calculate and store a price-to-earnings ratio for a company with ticker symbol XYZ. If the c
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Pl Sql Raise Exception
MessagesAvi Abrami1 - The Requirement Oracle database reserves error codes in the range -20000 to oracle raise exception with message -20999 for customized error messages. Often you want to include erroneous details in the body of your error message. For example, pl sql raise_application_error if you want to tell the user that [s]he entered a non-existent employee number, you would like to remind them what incorrect number they entered. Therefore, instead of supplying an error message that says: No such https://docs.oracle.com/cd/B10500_01/appdev.920/a96624/07_errs.htm employee ID. You would probably prefer an error message similar to the following: Employee ID 12345 not found. However, how do you put the actual employee ID into the error message? 2 - Customizing Oracle Database Error Message Using Oracle JVM You can use Oracle's database embedded JVM and the core java class "java.text.MessageFormat". The "MessageFormat" class has a method "format()" that receives an Object array method as parameter and returns http://www.oracle.com/technetwork/database/enterprise-edition/parameterized-custom-messages-098893.html a String. The method replaces placeholders in the String parameter with values from the array parameter. Using the example above, the default Oracle error message string would be: Employee ID {0} not found. And you would invoke the 'format()' method as follows MessageFormat.format("Employee ID {0} not found", new Object[]{"12345"}); 3 - Implementation Here are the implementation details: 1. Create a PL/SQL collection type. This must be a named, database type, otherwise it cannot be passed from PL/SQL to java. create or replace type STR_ARR is table of varchar2(100); 2. Next create a java class that will be later used as a java stored procedure: import java.sql.Array; import java.sql.SQLException; import java.text.MessageFormat; public class MsgFormatter { public static String fmtMsg(String msg, Array prms) { MessageFormat mf = new MessageFormat(msg); Object[] objs = (Object[]) prms.getArray(); return mf.format(objs); } } 3. Load the java class into the database. You can use the loadjava utility to do this. 4. Create a java stored procedure for the class you loaded into the database. For example: create or replace function FORMAT_MSG (P_MSG varchar2, P_ARR STR_ARR) return varchar2 is language java name 'MsgFormatter.fmtMsg(java.lang.String, java.sql.Array) return java.lang.String'; And that's it. 4 - Use It You can now supply your custom error message in your PL/SQL code, as follows: create or replace p
Basic Syntax PL/SQL - Data Types PL/SQL - Variables PL/SQL - Constants PL/SQL - Operators PL/SQL - Conditions PL/SQL - Loops PL/SQL - Strings PL/SQL - Arrays http://www.tutorialspoint.com/plsql/plsql_exceptions.htm PL/SQL - Procedures PL/SQL - Functions PL/SQL - Cursors PL/SQL - Records PL/SQL - Exceptions PL/SQL - Triggers PL/SQL - Packages PL/SQL - Collections PL/SQL - Transactions PL/SQL - Date & Time PL/SQL - DBMS Output PL/SQL - Object Oriented PL/SQL Useful Resources PL/SQL - Questions and Answers PL/SQL - Quick Guide PL/SQL - Useful Resources PL/SQL - Discussion error message Selected Reading Developer's Best Practices Questions and Answers Effective Resume Writing HR Interview Questions Computer Glossary Who is Who PL/SQL - Exceptions Advertisements Previous Page Next Page An error condition during a program execution is called an exception in PL/SQL. PL/SQL supports programmers to catch such conditions using EXCEPTION block in the program and an appropriate action is taken pl sql exception against the error condition. There are two types of exceptions: System-defined exceptions User-defined exceptions Syntax for Exception Handling The General Syntax for exception handling is as follows. Here you can list down as many as exceptions you want to handle. The default exception will be handled using WHEN others THEN: DECLARE