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int main (int argc, char *argv[]) {
Connection connection(use_exceptions);
try { // the entire main block is one big try block;
if (argc == 1) connection.connect("mysql_cpp_data","localhost","root","");
else if (argc == 2) connection.connect("",argv[1]);
else if (argc == 3) connection.connect("",argv[1],argv[2]);
else if (argc <= 4) connection.connect("",argv[1],argv[2],argv[3]);
// create a new object and connect based on any (if any) arguments
// passed to main();
try {
connection.select_db("mysql_cpp_data");
} catch (BadQuery er) {
// if it couldn''''t connect to the database assume that it doesn''''t exist
// and try created it. If that does not work exit with an error.
connection.create_db("mysql_cpp_data");
connection.select_db("mysql_cpp_data");
}
Query query = connection.query(); // create a new query object
try { // ignore any errors here
// I hope to make this simpler soon
query.execute("drop table stock");
} catch (BadQuery er) {}
query << "create table stock (item char(20) not null, num bigint,"
<< "weight double, price double, sdate date)";
query.execute(RESET_QUERY);
// send the query to create the table and execute it. The
// RESET_QUERY tells the query object to reset it self after
// execution
query << "insert into %5:table values (%0q, %1q, %2, %3, %4q)";
query.parse();
// set up the template query I will use to insert the data. The
// parse method call is important as it is what lets the query
// know that this is a template and not a literal string
query.def["table"] = "stock";
// This is setting the parameter named table to stock.
query.execute ("Hamburger Buns", 56, 1.25, 1.1, "1998-04-26");
query.execute ("Hotdogs'''' Buns" ,65, 1.1 , 1.1, "1998-04-23");
query.execute ("Dinner Roles" , 75, .95, .97, "1998-05-25");
query.execute ("Allen Lee" , 87, 1.5, 1.75, "1998-09-04");
// The last parameter "table" is not specified here. Thus
// the default value for "table" is used which is "stock".
} catch (BadQuery er) { // handle any errors that may come up
cerr << "Error: " << er.error << endl;
return -1;
}
}
附录三 fieldinf.cpp
#include <windows.h>
#include <iostream>
#include <iomanip>
#include <sqlplus.hh>
int main() {
try { // its in one big try block
Connection con(use_exceptions);
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