Home > Pl Sql > Pl Sql Exit On Error

Pl Sql Exit On Error

Contents

If there is no enclosing block, control returns to the host environment. CASE Statement Like the IF statement, the CASE statement selects one sequence of statements to execute. ACCESS_INTO_NULL 06530 -6530 A program attempts to assign values to the attributes of an uninitialized object CASE_NOT_FOUND 06592 -6592 None of the choices in the WHEN clauses of a CASE statement COMMIT Directs SQL*Plus to execute a COMMIT before exiting or continuing and save pending changes to the database. this content

All Rights Reserved. Therefore, the values of explicit cursor attributes are not available in the handler. The optional OTHERS exception handler, which is always the last handler in a block or subprogram, acts as the handler for all exceptions not named specifically. 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 check these guys out

Whenever Sqlerror Exit

Exceptions raised during the execution of a CASE statement are handled in the usual way. However, an exception name can appear only once in the exception-handling part of a PL/SQL block or subprogram. With SQLPlus, it is always best to connect, and then execute the script, or pass it in the < start > command line argument (sqlplus scott/tiger @foo.sql) to avoid this.

Tips for Handling PL/SQL Errors In this section, you learn three techniques that increase flexibility. For internal exceptions, SQLCODE returns the number of the Oracle error. SYS_INVALID_ROWID The conversion of a character string into a universal rowid fails because the character string does not represent a valid rowid. Whenever Sqlerror Exit 1 Shell Script Redeclaring predefined exceptions is error prone because your local declaration overrides the global declaration.

Consider the following example: 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; END IF; Pl/sql Continue After Exception In the following example, if the SELECT INTO statement raises ZERO_DIVIDE, you cannot resume with the INSERT statement: DECLARE pe_ratio NUMBER(3,1); BEGIN DELETE FROM stats WHERE symbol = 'XYZ'; SELECT price The selector expression is evaluated only once. More about the author Instead, you must assign their values to local variables, then use the variables in the SQL statement, as shown in the following example: DECLARE err_num NUMBER; err_msg VARCHAR2(100); BEGIN ...

IF-THEN Statement The simplest form of IF statement associates a condition with a sequence of statements enclosed by the keywords THEN and END IF (not ENDIF), as follows: IF condition THEN Pl Sql Exit Script IF valid THEN ... <> UPDATE emp SET ... Unhandled exceptions can also affect subprograms. A PL/SQL block cannot catch an exception raised by a remote subprogram.

Pl/sql Continue After Exception

Exceptions also improve reliability. https://docs.oracle.com/cd/B19306_01/server.102/b14357/ch12052.htm When you see an error stack, or sequence of error messages, the one on top is the one that you can trap and handle. Whenever Sqlerror Exit go

Pl Sql Developer Stop Execution The condition is tested at the top of the loop, so the sequence might execute zero times.

An example follows: CASE WHEN grade = 'A' THEN dbms_output.put_line('Excellent'); WHEN grade = 'B' THEN dbms_output.put_line('Very Good'); WHEN grade = 'C' THEN dbms_output.put_line('Good'); WHEN grade = 'D' THEN dbms_output.put_line('Fair'); WHEN grade If the optional third parameter is TRUE, the error is placed on the stack of previous errors. However, the same scope rules apply to variables and exceptions. NONE Directs SQL*Plus to take no action before continuing. Exception Handling In Oracle Stored Procedure Example

But the enclosing block cannot reference the name PAST_DUE, because the scope where it was declared no longer exists. The CASE statement has the following form: [<>] CASE selector WHEN expression1 THEN sequence_of_statements1; WHEN expression2 THEN sequence_of_statements2; ... LOGIN_DENIED Your program attempts to log on to Oracle with an invalid username and/or password. have a peek at these guys If the exception is ever raised in that block (including inside a sub-block), it will be handled.

Thus, a block or subprogram can have only one OTHERS handler. Sqlplus Exit Command But when the handler completes, the block is terminated. Exceptions can be internally defined (by the runtime system) or user defined.

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

The lower bound need not be 1, as the examples below show. NO_DATA_FOUND 01403 +100 A SELECT INTO statement returns no rows, or your program references a deleted element in a nested table or an uninitialized element in an index-by table. SQL aggregate functions such as AVG and SUM always return a value or a null. Pl/sql Raise Exception INVALID_CURSOR 01001 -1001 A program attempts a cursor operation that is not allowed, such as closing an unopened cursor.

Catching Unhandled Exceptions Remember, if it cannot find a handler for a raised exception, PL/SQL returns an unhandled exception error to the host environment, which determines the outcome. The categories are: Severe: Messages for conditions that might cause unexpected behavior or wrong results, such as aliasing problems with parameters. Skip Headers PL/SQL User's Guide and Reference Release 2 (9.2) Part Number A96624-01 Home Book List Contents Index Master Index Feedback 4 PL/SQL Control Structures One ship drives east and another When the FETCH statement fails to return a row, the condition is true, the loop completes, and control passes to the CLOSE statement.

Execution of the handler is complete, so the sub-block terminates, and execution continues with the INSERT statement. All Rights Reserved.