Oracle Job Error Handling
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Proper error handling is an import part of implementing robust job scheduling. Depending on the scheduling mechanism job failures can have differing effects. For jobs scheduled using the dbms_job package,
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16 consecutive failures will result in the job being marked as broken. The following definition creates a job that will fail on every run. * create_job_failure.sql BEGIN DBMS_JOB.isubmit (1000, 'BEGIN RAISE_APPLICATION_ERROR(-20000, ''Error''); END;' , SYSDATE, 'SYSDATE + INTERVAL ''1'' SECOND'); COMMIT; END; / The job_failures.sql script queries the dba_jobs view allowing the progress of the job error table in oracle to be monitored. * job_failures.sql -- ************************************************* -- Copyright ? 2005 by Rampant TechPress -- This script is free for non-commercial purposes -- with no warranties. Use at your own risk. -- -- To license this script for a commercial purpose, -- contact info@rampant.cc -- ************************************************* select job, broken, failures from dba_jobs where job = DECODE(UPPER('&1'), 'ALL', job, &1) ; The output of this query is displayed below. SQL> @job_failures.sql 1000 JOB B FAILURES ---------- - ---------- 1000 N 14
1 row selected. After 16 failures, the broken flag has been set. SQL> @job_failures.sql 1000 JOB B FAILURES ---------- - ---------- 1000 Y 16 1 row selected. Once the problem with the job is rectified, it could be restarted using the broken procedure. SQL> exec dbms_job.broken(1000, false); PL/SQL procedure successfully completed. SQL> @job_failures.sql 1000 JOB B FAILURES ---------- - ---------- 1000 N 16 1 row selected. Alternatively, the job could be dropped using the remove procedure. SQL> exec dbms_job.remove(1000); PL/SQL procedure successfully completed. SQL> commit; Commit coMarch 2012 Oracle Magazine Online 2016 2015 2014 2013 2012 2011 2010 January 2012 March 2012 May 2012 July 2012 September 2012 November 2012 As Published In March/April 2012 TECHNOLOGY: PL/SQL Error Management
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By Steven Feuerstein Part 6 in a series of articles on understanding error logging in oracle stored procedure and using PL/SQL Even if you write absolutely perfect PL/SQL programs, it is possible and even likely that something will oracle sqlerrm go wrong and an error will occur when those programs are run. How your code responds to and deals with that error often spells the difference between a successful application and one that http://www.dba-oracle.com/job_scheduling/error_checking_routines.htm creates all sorts of problems for users as well as developers. This article explores the world of error management in PL/SQL: the different types of exceptions you may encounter; when, why, and how exceptions are raised; how to define your own exceptions; how you can handle exceptions when they occur; and how you can report information about problems back to your users. Exception Overview There are three http://www.oracle.com/technetwork/issue-archive/2012/12-mar/o22plsql-1518275.html categories of exceptions in the world of PL/SQL: internally defined, predefined, and user-defined. 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 it is assigned one by PL/SQL or your own code. An example of an internally defined exception is ORA-00060 (deadlock detected while waiting for resource). A predefined exception is an internally defined exception that is assigned a name by PL/SQL. Most predefined exceptions are defined in the STANDARD package (a package provided by Oracle Database that defines many common programming elements of the PL/SQL language) and are among the most commonly encountered exceptions. One example is ORA-00001, which is assigned the name DUP_VAL_ON_INDEX in PL/SQL and is raised when a unique index constraint is violated. A user-defined exception is one you have declared in the declaration section of a program unit. User-defined exceptions can be associated with an internally defined exception (that is, you can give a name to an otherwise unnamed exception) or with an application-specific error. Every exception has an error code and an error message associated with it. Oracle Database provides func
as DML error logging. This chapter contains the following topics: "Inspecting Error Logs in Oracle Warehouse Builder" "Determining the Operators that Caused Errors in Mappings" https://docs.oracle.com/cd/E11882_01/owb.112/e10935/errors_trouble.htm "Using DML Error Logging" "Troubleshooting the ETL Process" Inspecting Error Logs in Oracle Warehouse Builder While working with Oracle Warehouse Builder, the designers must access log files and check on https://books.google.com/books?id=NaKoglGZoDwC&pg=PA159&lpg=PA159&dq=oracle+job+error+handling&source=bl&ots=9R4lowimjA&sig=XNh_fsGV_4Id21wVcw006LliAck&hl=en&sa=X&ved=0ahUKEwi-7M6L9OTPAhVCAxoKHSf5BZAQ6AEIWDAJ different types of errors. This section outlines all the different types of error messages that are logged by Oracle Warehouse Builder and how to access them. Oracle Warehouse Builder logs pl sql the following types of errors when you perform different operations: "Troubleshooting Validation Errors" "Troubleshooting Generation Errors" "Troubleshooting Deployment and Execution Errors" "Troubleshooting Name and Address Server Errors" This section shows you how to retrieve error logs after performing different operations in Oracle Warehouse Builder. Troubleshooting Validation Errors In Oracle Warehouse Builder, you can validate all objects by selecting the objects pl sql exception from the Projects Navigator and then selecting Validate from the File menu. After the validation is complete, the validation messages are displayed in the Log window. Figure 15-1 displays the validation messages in a new tab of the Message Log window. Figure 15-1 Validation Error Messages Description of "Figure 15-1 Validation Error Messages" You can also validate mappings from the Mapping Editor by selecting Mapping, then Validate. The validation messages and errors are displayed in the Validation Results window. In the validation results, expand the node displaying the object name and then the Validation node. The validation errors, if any are displayed. Double-click a validation message to display the detailed error message in a message editor window. Oracle Warehouse Builder saves the last validation messages for each previously validated object. You can access these messages at any time by selecting the object from the console tree in the Projects Navigator, selecting View from the menu bar, and then clicking Validation Messages. The messages are displayed in the Validation Results window. Troubleshooting Generation Errors After you generate scripts
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