Example 10-15 Controlling the Display of PL/SQL Warnings -- To focus on one aspect ALTER SESSION SET PLSQL_WARNINGS='ENABLE:PERFORMANCE'; -- Recompile with extra checking ALTER PROCEDURE loc_var COMPILE PLSQL_WARNINGS='ENABLE:PERFORMANCE' REUSE SETTINGS; -- You cannot return to the current block from an exception handler. The keyword OTHERS cannot appear in the list of exception names; it must appear by itself. DBMS_UTILITY.FORMAT_ERROR_BACKTRACE The execution call stack. this page
Advantages of PL/SQL Exceptions Using exceptions for error handling has several advantages. STORAGE_ERROR ORA-06500 You ran out of memory or memory was corrupted. The problem with this approach is that your application has “swallowed up” an error. Would it be possible for inserts to continue without termination, because right now on the first handled exception, the procedure terminates execution. https://docs.oracle.com/cd/A97630_01/appdev.920/a96624/07_errs.htm
Example 10-12 Continuing After an Exception DECLARE sal_calc NUMBER(8,2); BEGIN INSERT INTO employees_temp VALUES (303, 2500, 0); BEGIN -- sub-block begins SELECT salary / commission_pct INTO sal_calc FROM employees_temp WHERE employee_id That is, some kind of problem has occurred during the execution of your code and you have no control over this process. What does the SQLERRM Function do? Error Table In Oracle An internally defined exception is one that is raised internally by an Oracle Database process; this kind of exception always has an error code but does not have a name unless
For example, in the Oracle Precompilers environment, any database changes made by a failed SQL statement or PL/SQL block are rolled back. Oracle Raise Exception With Message SQL> INSERT INTO book (isbn, category, title, num_pages, price, copyright, emp1, emp2, emp3) 2 VALUES ('3', 'Database', 'SQL Server', 404, 39.99, 2001, 6, 7, 8); 1 row created. So, your program cannot open that cursor inside the loop. http://www.oracle.com/technetwork/issue-archive/2012/12-mar/o22plsql-1518275.html Why would you want to do this?
Example 10-1 Runtime Error Handling DECLARE stock_price NUMBER := 9.73; net_earnings NUMBER := 0; pe_ratio NUMBER; BEGIN -- Calculation might cause division-by-zero error. Dml Error Logging In Oracle 11g If an error occurs, and that error is handled at any level by the time we're back at the SQL*Plus prompt, we only rollback to the immediate savepoint at the start It’s easy enough to define one or more WHEN clauses. Though they share the same name, the two past_due exceptions are different, just as the two acct_num variables share the same name but are different variables.
SQLERRM or DBMS_UTILITY.FORMAT_ERROR_STACK Note: You cannot call SQLERRM inside a SQL statement. https://www.techonthenet.com/oracle/exceptions/named_system.php But when the handler completes, the block is terminated. Pl Sql Exception Handling Examples All rights reserved. Pl Sql Exception Handling Best Practices SQLCODE Note: You cannot call this function inside a SQL statement.
This kind of error message might be sufficient for reporting database errors, but what if an application-specific error—such as “Employee is too young” or “Salary cannot be greater than $1,000”—has been Though they share the same name, the two past_due exceptions are different, just as the two acct_num variables share the same name but are different variables. The other internal exceptions can be given names. Get More Info INVALID_NUMBER ORA-01722 It isn't a number, even though you are treating it like one to trying to turn it into one.
Syntax for Procedures The syntax for the WHEN OTHERS clause in a procedure is: CREATE [OR REPLACE] PROCEDURE procedure_name [ (parameter [,parameter]) ] IS [declaration_section] BEGIN executable_section EXCEPTION WHEN exception_name1 THEN Pl Sql Logging Example CASE 2: Then I modified the unnamed block so it did two good inserts and then called a stored procedure that did two good inserts and ended with one 'bad' - Here are some examples of WHEN clauses: Catch the NO_DATA_FOUND exception, usually raised when a SELECT-INTO statement is executed and finds no rows.
Databases SQL Oracle / PLSQL SQL Server MySQL MariaDB PostgreSQL SQLite MS Office Excel Access Word Web Development HTML CSS Color Picker Languages C Language More ASCII Table Linux UNIX Java To reraise an exception, simply place a RAISE statement in the local handler, as shown in the following example: DECLARE out_of_balance EXCEPTION; BEGIN ... I hope this one illustrates what I'm trying to do better. Anonymous Exception In Oracle Exceptions declared in a block are considered local to that block and global to all its sub-blocks.
You might store such information in a separate table. If the exception is ever raised in that block (or any sub-block), you can be sure it will be handled. Exceptions Raised in Declarations Exceptions can be raised in declarations by faulty initialization expressions. see here The next paragraphs describe generally the flow of execution in a block when an error occurs (see Figure 1).
That is, the exception reproduces itself in successive enclosing blocks until a handler is found or there are no more blocks to search. Syntax We will take a look at the syntax for Named System Exceptions in both procedures and functions. NOT_LOGGED_ON ORA-01012 You tried to execute a call to Oracle before logging in. Passing a positive number to SQLERRM always returns the message user-defined exception unless you pass +100, in which case SQLERRM returns the message no data found.
You can pass an error number to SQLERRM, in which case SQLERRM returns the message associated with that error number. COLLECTION_IS_NULL Your program attempts to apply collection methods other than EXISTS to an uninitialized (atomically null) nested table or varray, or the program attempts to assign values to the elements of From there on, the exception propagates normally. This capability was added in Oracle Database 10g Release 2 and is enormously helpful in tracking down the cause of errors.
You can enable and disable entire categories of warnings (ALL, SEVERE, INFORMATIONAL, PERFORMANCE), enable and disable specific message numbers, and make the database treat certain warnings as compilation errors so that