[libdbi-devel] Expose tm struct for DATETIME

[Jan E. <je...@in...>]

I have a 2-patch here which I would like to share before merging.

SQL databases such as Mysql support dates from 1000-01-01 to
9999-01-01. However, even "reasonable" dates like 1968-02-14 cannot
be reliably retrieved through libdbi. The root problem is that time_t
only starts at 1970, and MSVCRT outright refuses to transform a
struct tm into an epochtime if it is before 1970 - and that is even
within the specification.

How I solve this: make the struct tm available. It is a bit of a cut
into the dbi API, but hopefully done right.