[issue9303] Migrate sqlite3 module to _v2 API to enhance performance

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

> sqlite3_open_v2 - 2007-09-04 (3.5.0) alpha
> sqlite3_prepare_v2 - 2007-01-04 (3.3.9)
> sqlite3_close_v2 - 2012-09-03 (3.7.14)

There are compile-time checks for supporting SQLite older than 3.2.2.

I think it is better to use the preprocessor rather of autotools for 
conformance with the rest of code.

> What should I do for this to work on windows?

On Windows manually written PC/pyconfig.h is used rather of generated by 
configure pyconfig.h. If you change pyconfig.h, you should update PC/pyconfig.h 
too. But I think this is not needed in this case. Just use 
SQLITE_VERSION_NUMBER.

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<http://bugs.python.org/issue9303>
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