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Is there a way disconnect from database

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Contributed by turumkhan on Jun 28, 2001 at 22:24 UTC
Q&A  > database programming


Description:

I am stuck with a very typical problem.... and need help badly..... The thing is i am using DBI to connect to a database and at the end of the script i disconnect form the database by
$db_handle->disconect();
but this disconnect happens at the end of script.. Now if something happens and my script is killed before it reaches the end of the script... how to i disconnect form the database. Like i do a CTRL + c on the script that kills the execution but doesnot disconnect from database.... so is there a way for me to disconnect from database when this happens.
thanks
- turum.

Answer: Is there a way disconnect from database
contributed by mikeB

DBI will automatically close open connections at the end of a program, but will complain to let you know you forgot. This happens even with Ctrl-C, as the closing is handled by the connection's DESTROY method, which is invoked by Perl's garbage collection when the program terminates.

A major problem with depending on the automatic close is the variance in handling of open transactions. Some DBD's will commit, while others rollback.

Check out chapter 4 of Programming the Perl DBI (the ORA Cheetah book).

Answer: Is there a way disconnect from database
contributed by Mr. Muskrat

In most cases you can use:

END { $db_handle->disconnect(); }
Answer: Is there a way disconnect from database
contributed by aijin

You should set up a signal handler.

$SIG{INT} = \&some_subroutine;
will run the subroutine on a Ctrl-C.

$SIG{INT} = 'IGNORE';
will ignore Ctrl-C and the program will keep running.

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