[Dovecot] Oracle SQL driver

[Alexander Bukharov]

> There wouldn't be any uncommitted statements. The only such statements
are
> sent inside commit(), the others are SELECTs and such that don't modify
> anything.

Ok. I made things this way.

> Well, that also wastes memory :) I thought I remembered using VARCHAR
> pointers about 10 years ago. I think I still have that code around, but I
> currently don't have a computer where I could put that hard drive. Maybe
in
> a few days.

No need for this. I found a way to handle VARCHAR pointers. Now all ok.
There is always a time to learn =)

> Does Oracle handle \ specially? I don't have Oracle installed currently
or
> access to any installations.

No unless an escape clause is specified in SQL-statement.

> I'll check the updated patch later.

Here is a fixed one.
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