Every program is a threaded program, even if it only has one thread.

If DBI works correctly in all of those, then if some of them create a second thread: 

use DBI;
use threads;

async { sleep 1 while 1 }->detach;

# the rest of the script.

[download]

it'll continue to work correctly. Provided you don't use DBI within that other thread!

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
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In reply to Re^2: Sharing DBI between threads by BrowserUk
in thread Sharing DBI between threads by bagent

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