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Throw DB error

by Bheema_Tyco (Novice)
on Mar 02, 2010 at 06:50 UTC ( [id://826081]=perlquestion: print w/replies, xml ) Need Help??

Bheema_Tyco has asked for the wisdom of the Perl Monks concerning the following question:

I want to test a particular Scenario in my code, that is, How my code will responds if any DB(oracle) error occurs while processing the particular transaction. So for that i need to throw db error intentionally, How can i do it in my Perl code. Thanks in advance Bheema..

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Re: Throw DB error
by Anonymous Monk on Mar 02, 2010 at 09:03 UTC
Re: Throw DB error
by mje (Curate) on Mar 02, 2010 at 09:04 UTC

    May be I am misunderstanding your question but if all you want is to get a database error why can't you change your code to provide incorrect SQL syntax or an incorrect parameter to a procedure or whatever. If you cannot change your code can you lock a table the code uses and wait for a lock timeout? This seems so straight forward I'm sure you must mean something else. If so what kind of "database" error do you need?

      Rather than locking a table (very unusual in Oracle), you can try simply misspelling a column name in your SQL statement. Oracle's compiler will throw an error for that.
      select fred from global_name * ERROR at line 1: ORA-00904: "FRED": invalid identifier

        Thanks for your reply. But i thing is, my code has to run for some extent then it has to throw DB error. So that only i can test my code for particular case. Tell me how can i throw db error at somewhere middle in the code

        By Bheema

      Thanks for your Ans But the thing i don't wants to change my SQL query. Because for extent it should work and then it should throw db error. So how should i throw db error intentionally

      By Bheema

        If you don't want to change your SQL then you will have to create a problem at the database end by ensuring some of your SQL fails - e.g., manually create a row which will cause a constraint to fail in your SQL, delete a key, change permissions etc. The possibilities are endless so I'm not listing all I can think of here.

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