EXCEPTION (ERROR) HANDLING - Concepts

Hello everyone;

Now, I'm learning "PL/SQL " EXCEPTIONS MANAGEMENT (ERRORS)

I have official document of interim oracle. If I want to record some doubts here. 

(I have googled but is not clear, so I expect answers from experts)

REF_LINK: http://docs.oracle.com/cd/E11882_01/timesten.112/e21639/exceptions.htm#BABHCGHA


Whenever occurs an error in the program - PL/SQL throws an exception


Question 1: What is exactly predefined Exceptions?


Consider that I have 5 PL/SQL blocks, if 1st slice with the error and the fact of block t contains an exception handler.


Question 2: If so, does pl/sql runs remaining all the blocks?  or leave suddenly 1st block?


Question 3: If any block does not contain an exception handler, what will happen? (review, error occurred in a whole block)


Thanks in advance !

TimesTen?  -I don't know what timesten

Then why did you post a link to the ' PL/SQL oracle TimesTen In - Memory Database® Developer's guide'

See the Guide of Dev of PL/SQL Oracle DB

http://docs.Oracle.com/CD/E11882_01/AppDev.112/e25519/errors.htm#CHDFGBJI

This chapter explains how to handle warnings compiling PL/SQL and PL/SQL runtime errors. These are called exceptions.

Note:

The language of the warning and error messages depends on to the NLS_LANGUAGE parameter. For more information about this setting, see the Oracle database globalization support Guide.

Topics

Visit this section for 'predefined Exceptions "? It lists these exceptions and tells you what they are.

The "Overview of the management of exceptions" section will explain how exceptions are handled.

If an exception is thrown in a block that has no exception for her handler, the exception propagates. That said, the exception reproduces itself in successive inclusive blocks until a block contains a handler for it or there is no enclosing block (for more information, see "Propagation of the Exception"). If there is no handler for the exception, PL/SQL returns an unhandled environmental exception error caller or host, that determines the outcome (for more information, see "unhandled Exceptions").

So if your five blocks are NOT nested each of them can have an exception handler. So if an exception occurs in a block and you handle this exception the next block will BE executed.

If your five nested blocks then the exception in an inner block will spread it is enveloping block if you do not manage it.

Tags: Database

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