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Pl Sql Error Message Exception
The general syntax to declare unnamed system exception using EXCEPTION_INIT is: DECLARE exception_name EXCEPTION; PRAGMA EXCEPTION_INIT (exception_name, Err_code); BEGIN Execution section EXCEPTION WHEN exception_name THEN handle the exception END; For Example: Example 10-13 Retrying a Transaction After an Exception CREATE TABLE results ( res_name VARCHAR(20), res_answer VARCHAR2(3) ); CREATE UNIQUE INDEX res_name_ix ON results (res_name); INSERT INTO results VALUES ('SMYTHE', 'YES'); INSERT If the exception is ever raised in that block (including inside a sub-block), it will be handled. Because a block can reference only local or global exceptions, enclosing blocks cannot reference exceptions declared in a sub-block. http://setiweb.org/pl-sql/pl-sql-exception-get-error-message.php
You must raise a user-defined exception explicitly. Upper bounds for regulators of real quadratic fields How Aggregate Result are count against the Governor Limits? Note that you do not need to qualify raise_application_error with DBMS_STANDARD */ raise_application_error(-20101, 'Expecting at least 1000 tables'); ELSE NULL; -- Do the rest of the processing (for the non-error case). Thus, a block or subprogram can have only one OTHERS handler.
Oracle Raise Exception With Message
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. 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. If autocommit is enabled and an unhandled exception occurs in TimesTen, the entire transaction is rolled back. Example 10-8 Scope of an Exception BEGIN DECLARE ---------- sub-block begins past_due EXCEPTION; due_date DATE := trunc(SYSDATE) - 1; todays_date DATE := trunc(SYSDATE); BEGIN IF due_date < todays_date THEN RAISE past_due;
CASE 3: Then I reran everything, except the unnamed block had a generic when others then null; error trap, and the stored procedure had a generic when others the null; error If the parameter is FALSE (the default), the error replaces all previous errors. Make your programs robust enough to work even if the database is not in the state you expect. Oracle Sql Codes List If there is no enclosing block, control returns to the host environment.
Example 11-23 Exception Handler Runs and Execution Ends DROP TABLE employees_temp; CREATE TABLE employees_temp AS SELECT employee_id, salary, commission_pct FROM employees; DECLARE sal_calc NUMBER(8,2); BEGIN INSERT INTO employees_temp (employee_id, salary, commission_pct) Functions For Error Trapping Are Contained In Which Section Of A Pl/sql Block EXCEPTION WHEN OTHERS THEN err_num := SQLCODE; err_msg := SUBSTR(SQLERRM, 1, 100); INSERT INTO errors VALUES (err_num, err_msg); END; The string function SUBSTR ensures that a VALUE_ERROR exception (for truncation) is Table 4-1 lists predefined exceptions supported by TimesTen, the associated ORA error numbers and SQLCODE values, and descriptions of the exceptions. VALUE_ERROR 06502 -6502 An arithmetic, conversion, truncation, or size-constraint error occurs.
Once the exception name is lost, only an OTHERS handler can catch the exception. Oracle Sqlcode List When the exception handler completes, the sub-block terminates, control transfers to the LOOP statement in the enclosing block, the sub-block starts executing again, and the transaction is retried. We use advertisements to support this website and fund the development of new content. Learn the names and causes of the predefined exceptions.
Functions For Error Trapping Are Contained In Which Section Of A Pl/sql Block
Avoid unhandled exceptions by including an OTHERS exception handler at the top level of every PL/SQL program. Passing a zero to SQLERRM always returns the message normal, successful completion. Oracle Raise Exception With Message 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 ... Oracle Sql Error Codes The maximum length of an Oracle error message is 512 characters including the error code, nested messages, and message inserts such as table and column names.
That way, an exception handler written for the predefined exception can process other errors, as the following example shows: DECLARE acct_type INTEGER := 7; BEGIN IF acct_type NOT IN (1, 2, http://setiweb.org/pl-sql/pl-sql-exception-error-code.php SUBSCRIPT_BEYOND_COUNT ORA-06533 Reference to a nested table or varray index higher than the number of elements in the collection. ORA-01476 For Example: Suppose a NO_DATA_FOUND exception is raised in a proc, we can write a code to handle the exception as given below. For example, in the Oracle Precompilers environment, any database changes made by a failed SQL statement or PL/SQL block are rolled back. Pl Sql Sqlcode
This parameter can be set at the system level or the session level. TOO_MANY_ROWS A SELECT INTO statement returns more than one row. These are known as user-defined exceptions. navigate to this website In Example 11-13, the INSERT statement might raise an exception because of a duplicate value in a unique column.
Example 11-14 Using a Locator Variable to Identify the Location of an Exception CREATE OR REPLACE PROCEDURE loc_var AS stmt_no NUMBER; name VARCHAR2(100); BEGIN stmt_no := 1; -- designates 1st SELECT Pl Sql Exception Handling Examples A stored PL/SQL unit Use an ALTER statement from "ALTER Statements" with its compiler_parameters_clause. The inner block has an exception handler for A, so A does not propagate.
This handler is never called.
Example 11-7 Using RAISE to Raise a Predefined Exception DECLARE acct_type INTEGER := 7; BEGIN IF acct_type NOT IN (1, 2, 3) THEN RAISE INVALID_NUMBER; -- raise predefined exception END IF; Retrying a Transaction After an exception is raised, rather than abandon your transaction, you might want to retry it. You must raise user-defined exceptions explicitly. Sqlerror When the sub-block ends, the enclosing block continues to execute at the point where the sub-block ends, as shown in Example 11-12.
DUP_VAL_ON_INDEX 00001 -1 A program attempts to store duplicate values in a column that is constrained by a unique index. Use of TimesTen expressions at runtime TimesTen SQL includes several constructs that are not present in Oracle Database SQL. Next, the example enables all warnings for the session by invoking DBMS_WARNING.set_warning_setting_string and displays the value of PLSQL_WARNINGS by invoking DBMS_WARNING.get_warning_setting_string. http://setiweb.org/pl-sql/pl-sql-exception-print-error-message.php Example 11-7 Anonymous Block Avoids ZERO_DIVIDE 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;
You can avoid unhandled exceptions by coding an OTHERS handler at the topmost level of every PL/SQL program. In Example 11-6, you alert your PL/SQL block to a user-defined exception named out_of_stock. 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. A cursor FOR loop automatically opens the cursor to which it refers.
Also, it can use the pragma EXCEPTION_INIT to map specific error numbers returned by raise_application_error to exceptions of its own, as the following Pro*C example shows: EXEC SQL EXECUTE /* Execute In Example 11-15, the VALUE_ERROR exception handler is in the same block as the declaration that raises VALUE_ERROR. Note: When using pragma RESTRICT_REFERENCES to assert the purity of a stored function, you cannot specify the constraints WNPS and RNPS if the function calls SQLCODE or SQLERRM. If the statement fails, Oracle rolls back to the savepoint.
The best way to pass exception information to the calling function is to do nothing, and let the exception naturally raise. These statements complete execution of the block or subprogram; control does not return to where the exception was raised. Start with the index at the beginning of the string *; v_Index := 1; /* Loop through the string, finding each newline A newline ends You can, however, declare the same exception in two different blocks.
Use of the OTHERS handler guarantees that no exception will go unhandled. The outer block declares the exception, so the exception name exists in both blocks, and each block has an exception handler specifically for that exception. Internal exceptions are raised implicitly (automatically) by the run-time system. If the transaction succeeds, commit, then exit from the loop.
Example 11-13 Retrying a Transaction After an Exception CREATE TABLE results (res_name VARCHAR(20), res_answer VARCHAR2(3)); CREATE UNIQUE INDEX res_name_ix ON results (res_name); INSERT INTO results VALUES ('SMYTHE', 'YES'); INSERT INTO results Whenever possible, write exception handlers for named exceptions instead of using OTHERS exception handlers. An exception raised inside a handler propagates immediately to the enclosing block, which is searched to find a handler for this new exception.