a1b78ec9f3
Now requires c++17.
Headline:
Easier, faster, neater: the transaction classes now have a stream
method. You specify a query and the C++ types to which you want
the fields converted, and you get to iterate over the rows. And
thanks to C++14 structured bindings, you can read the fields
straight into separate local variables:
for (auto const [id, name]:
tx.stream<int, std::string_view>("SELECT id, name FROM thing"))
{
process(id, name);
}
For super-fast access to a field's text-format contents, convert
it to std::string_view. It'll give you an immediate reference
to the buffer containing the field. Beware though: the buffer
only holds that text for the one iteration. The next iteration
will overwrite it.
Full list of changes at:
https://github.com/jtv/libpqxx/blob/7.1.2/NEWS
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