sqlite3pp

Usage

database

sqlite3pp::database db("test.db");
db.execute("INSERT INTO contacts (name, phone) VALUES ('Mike', '555-1234')");

command

sqlite3pp::command cmd(
 db, "INSERT INTO contacts (name, phone) VALUES (?, ?)");
cmd.binder() << "Mike" << "555-1234";
cmd.execute();

sqlite3pp::command cmd(db, "INSERT INTO contacts (name, phone) VALUES (?, ?)");
cmd.bind(1, "Mike");
cmd.bind(2, "555-1234");
cmd.execute();

sqlite3pp::command cmd(
 db, "INSERT INTO contacts (name, phone) VALUES (?100, ?101)");
cmd.bind(100, "Mike");
cmd.bind(101, "555-1234");
cmd.execute();

sqlite3pp::command cmd(
 db, "INSERT INTO contacts (name, phone) VALUES (:user, :phone)");
cmd.bind(":user", "Mike");
cmd.bind(":phone", "555-1234");
cmd.execute();

transaction

sqlite3pp::transaction xct(db);
{
 sqlite3pp::command cmd(
 db, "INSERT INTO contacts (name, phone) VALUES (:user, :phone)");
 cmd.bind(":user", "Mike");
 cmd.bind(":phone", "555-1234");
 cmd.execute();
}
xct.rollback();

query

sqlite3pp::query qry(db, "SELECT id, name, phone FROM contacts");
for (int i = 0; i < qry.column_count(); ++i) {
 cout << qry.column_name(i) << "\t";
}

for (sqlite3pp::query::iterator i = qry.begin(); i != qry.end(); ++i) {
 for (int j = 0; j < qry.column_count(); ++j) {
 cout << (*i).get<char const*>(j) << "\t";
 }
 cout << endl;
}

for (sqlite3pp::query::iterator i = qry.begin(); i != qry.end(); ++i) {
 int id;
 char const* name, *phone;
 std::tie(id, name, phone) =
 (*i).get_columns<int, char const*, char const*>(0, 1, 2);
 cout << id << "\t" << name << "\t" << phone << endl;
}

for (sqlite3pp::query::iterator i = qry.begin(); i != qry.end(); ++i) {
 string name, phone;
 (*i).getter() >> sqlite3pp::ignore >> name >> phone;
 cout << "\t" << name << "\t" << phone << endl;
}

attach

sqlite3pp::database db("foods.db");b
db.attach("test.db", "test");
sqlite3pp::query qry(
 db,
 "SELECT epi.* FROM episodes epi, test.contacts con WHERE epi.id = con.id");

callback

struct rollback_handler
{
 void operator()() {
 cout << "handle_rollback" << endl;
 }
};
sqlite3pp::database db("test.db");
db.set_commit_handler([]{ cout << "handle_commit\n"; return 0; });
db.set_rollback_handler(rollback_handler());

int handle_authorize(int evcode, char const* p1, char const* p2,
 char const* dbname, char const* tvname) {
 cout << "handle_authorize(" << evcode << ")" << endl;
 return 0;
}
db.set_authorize_handler(&handle_authorize);

struct handler
{
 handler() : cnt_(0) {}
 void handle_update(int opcode, char const* dbname,
 char const* tablename, int64_t rowid) {
 cout << "handle_update(" << opcode << ", " << dbname << ", "
 << tablename << ", " << rowid << ") - " << cnt_++ << endl;
 }
 int cnt_;
};
using namespace std::placeholders;
db.set_update_handler(std::bind(&handler::handle_update, &h, _1, _2, _3, _4));

function

int test0()
{
 return 100;
}
sqlite3pp::database db("test.db");
sqlite3pp::ext::function func(db);
func.create<int ()>("test0", &test0);

void test1(sqlite3pp::ext::context& ctx)
{
 ctx.result(200);
}
void test2(sqlite3pp::ext::context& ctx)
{
 string args = ctx.get<string>(0);
 ctx.result(args);
}
void test3(sqlite3pp::ext::context& ctx)
{
 ctx.result_copy(0);
}
func.create("test1", &test1);
func.create("test2", &test2, 1);
func.create("test3", &test3, 1);

func.create<int ()>("test4", []{ return 500; });

string test5(string const& value)
{
 return value;
}
string test6(string const& s1, string const& s2, string const& s3)
{
 return s1 + s2 + s3;
}
func.create<int (int)>("test5", [](int i){ return i + 10000; });
func.create<string (string, string, string)>("test6", &test6);

sqlite3pp::query qry(
 db,
 "SELECT test0(), test1(), test2('x'), test3('y'), test4(), test5(10), "
 "test6('a', 'b', 'c')");

aggregate

void step(sqlite3pp::ext::context& c)
{
 int* sum = (int*) c.aggregate_data(sizeof(int));
 *sum += c.get<int>(0);
}
void finalize(sqlite3pp::ext::context& c)
{
 int* sum = (int*) c.aggregate_data(sizeof(int));
 c.result(*sum);
}
sqlite3pp::database db("foods.db");
sqlite3pp::ext::aggregate aggr(db);
aggr.create("aggr0", &step, &finalize);

struct mycnt
{
 void step() {
 ++n_;
 }
 int finish() {
 return n_;
 }
 int n_;
};
aggr.create<mycnt>("aggr1");

struct strcnt
{
 void step(string const& s) {
 s_ += s;
 }
 int finish() {
 return s_.size();
 }
 string s_;
};
struct plussum
{
 void step(int n1, int n2) {
 n_ += n1 + n2;
 }
 int finish() {
 return n_;
 }
 int n_;
};
aggr.create<strcnt, string>("aggr2");
aggr.create<plussum, int, int>("aggr3");

sqlite3pp::query qry(
 db,
 "SELECT aggr0(id), aggr1(type_id), aggr2(name), aggr3(id, type_id) "
 "FROM foods");

See also