// SELECT DISTINCT birthyear FROM players WHERE birthyear > 1980
void sample10(Poco::MongoDB::Connection& connection)
{
std::cout << "*** SAMPLE 10 ***" << std::endl;
Poco::MongoDB::Database db("sample");
Poco::SharedPtr<Poco::MongoDB::QueryRequest> command = db.createCommand();
command->selector()
.add("distinct", "players")
.add("key", "birthyear")
.addNewDocument("query")
.addNewDocument("birthyear")
.add("$gt", 1980);
Poco::MongoDB::ResponseMessage response;
connection.sendRequest(*command, response);
if ( response.hasDocuments() )
{
Poco::MongoDB::Array::Ptr values = response.documents()[0]->get<Poco::MongoDB::Array::Ptr>("values");
for(int i = 0; i < values->size(); ++i )
{
std::cout << values->get<int>(i) << std::endl;
}
}
}
// SELECT * FROM players LIMIT 1
void sample9(Poco::MongoDB::Connection& connection)
{
std::cout << "*** SAMPLE 9 ***" << std::endl;
// QueryRequest can be used directly
Poco::MongoDB::QueryRequest query("sample.players");
query.setNumberToReturn(1);
Poco::MongoDB::ResponseMessage response;
connection.sendRequest(query, response);
if ( response.hasDocuments() )
{
std::cout << response.documents()[0]->toString(2) << std::endl;
}
// QueryRequest can be created using the Database class
Poco::MongoDB::Database db("sample");
Poco::SharedPtr<Poco::MongoDB::QueryRequest> queryPtr = db.createQueryRequest("players");
queryPtr->setNumberToReturn(1);
connection.sendRequest(*queryPtr, response);
if ( response.hasDocuments() )
{
std::cout << response.documents()[0]->toString(2) << std::endl;
}
}
// SELECT COUNT(*) FROM players WHERE birthyear > 1980
void sample11(Poco::MongoDB::Connection& connection)
{
std::cout << "*** SAMPLE 11 ***" << std::endl;
Poco::MongoDB::Database db("sample");
Poco::SharedPtr<Poco::MongoDB::QueryRequest> count = db.createCountRequest("players");
count->selector().addNewDocument("query")
.addNewDocument("birthyear")
.add("$gt", 1980);
Poco::MongoDB::ResponseMessage response;
connection.sendRequest(*count, response);
if ( response.hasDocuments() )
{
std::cout << "Count: " << response.documents()[0]->get<double>("n") << std::endl;
}
}