RowPtr
SqlCursor::fetch_row()
{
try {
RowPtr row = backend_->fetch_row();
if (row.get()) {
Row::iterator j = row->begin(), jend = row->end();
for (; j != jend; ++j) {
String uname = str_to_upper(j->first);
using namespace std;
swap(j->first, uname);
}
}
if (echo_) {
if (row.get()) {
std::ostringstream out;
out << "fetch: ";
Row::const_iterator j = row->begin(),
jend = row->end();
for (; j != jend; ++j)
out << NARROW(j->first) << "="
<< NARROW(j->second.sql_str()) << " ";
debug(WIDEN(out.str()));
}
else
debug(_T("fetch: no more rows"));
}
return row;
}
catch (const std::exception &e) {
connection_.mark_bad(e);
throw;
}
}
const Value
EngineBase::select1(const Expression &what,
const Expression &from, const Expression &where)
{
RowPtr row = select_row(what, from, where);
if (row->size() != 1)
throw BadSQLOperation(_T("Unable to fetch exactly one column!"));
return row->begin()->second;
}