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I think you need to answer a couple of questions first:
  • What do you expect to happen when you serialize the DB connection? Should the DB connection be closed? What should be stored in the serialized data structure?
  • What do you expect to happen when you de-serialize the DB connection? Should the connection happen immediately? What about waiting until the first query because you may not actually use the DB connection at every given de-serialization.
There are some further concerns:
  • Should passwords be stored? If so, how?
  • How should DBI connections using DBD::Excel or DBD::CSV work?
  • What should happen if you de-serialize the thing and attempt to use the DB connection on a box that doesn't have the right things installed?
And I'm sure that I'm missing some concerns. In other words, serializing stuff that uses external resources is non-trivial. I've run into the same problem with DBM::Deep and I don't have a really good way to solve it as of yet.

My criteria for good software:
  1. Does it work?
  2. Can someone else come in, make a change, and be reasonably certain no bugs were introduced?

In reply to Re^3: Never use Storable to save XS objects by dragonchild
in thread Never use Storable to save XS objects by Jouke

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    Corion had a meeting with some startup today. They have a very interesting DB proxy product, but their tech stack is really, really weird. They use the Pg wire protocol but not the Pg libraries to handle it. They support Pg SQL syntax, but don't use ...
    [Corion]: ... the Pg parser (or so they claim).

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