DataMapper batch inserts

[Yaraslaut]

We should add support for the batch inserts, something like

std::vector<Record> recors {};
dm.Create(records);

[christianparpart]

@Yaraslaut This would be without ODBC-native performance optimization of batch-processing.

We could possibly still achieve that by compile-time checking if each member of Record satisfies SqlNativeContiguousValueConcept, we could then construct the correct offsetting.

That sounds actually like an interesting challenge.

However, instead of going for overloading Create(record) you probably want to have a CreateBatched(records), to keep things more self explanatory.

[christianparpart]

std::vector<Record> recors {};
dm.CreateAll(records);

quite funnily, i've recently added it. so closing.