62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
#include "../lmdb-safe.hh"
|
|
|
|
#include <unistd.h>
|
|
|
|
#include <iostream>
|
|
|
|
using namespace std;
|
|
using namespace LMDBSafe;
|
|
|
|
int main()
|
|
{
|
|
unlink("./multi");
|
|
auto env = getMDBEnv("./multi.lmdb", MDB_NOSUBDIR, 0600);
|
|
auto dbi = env->openDB("qnames", MDB_DUPSORT | MDB_CREATE);
|
|
|
|
auto txn = env->getRWTransaction();
|
|
txn->clear(dbi);
|
|
|
|
txn->put(dbi, "bdb", "old");
|
|
txn->put(dbi, "lmdb", "hot");
|
|
txn->put(dbi, "lmdb", "fast");
|
|
txn->put(dbi, "lmdb", "zooms");
|
|
txn->put(dbi, "lmdb", "c");
|
|
txn->put(dbi, "mdb", "old name");
|
|
|
|
string_view v1;
|
|
if (!txn->get(dbi, "mdb", v1)) {
|
|
cout << v1 << endl;
|
|
} else {
|
|
cout << "found nothing" << endl;
|
|
}
|
|
txn->commit();
|
|
|
|
txn = env->getRWTransaction();
|
|
auto cursor = txn->getRWCursor(dbi);
|
|
|
|
MDBOutVal key, data;
|
|
|
|
for (int rc = cursor.find("lmdb", key, data); !rc; rc = cursor.get(key, data, MDB_NEXT_DUP)) {
|
|
cout << key.get<string_view>() << " = " << data.get<string_view>() << endl;
|
|
}
|
|
|
|
cout << "Dump of complete database: " << endl;
|
|
for (int rc = cursor.first(key, data); !rc; rc = cursor.next(key, data)) {
|
|
cout << key.get<string_view>() << " = " << data.get<string_view>() << endl;
|
|
}
|
|
cout << "Done!" << endl;
|
|
|
|
cout << "Now going to delete 'lmdb' keys" << endl;
|
|
|
|
for (int rc = cursor.first(key, data); !rc; rc = cursor.next(key, data)) {
|
|
if (key.get<string_view>() == "lmdb")
|
|
cursor.del();
|
|
}
|
|
|
|
cout << "Complete database after deleting 'lmdb' keys: " << endl;
|
|
|
|
for (int rc = cursor.first(key, data); !rc; rc = cursor.next(key, data)) {
|
|
cout << key.get<string_view>() << " = " << data.get<string_view>() << endl;
|
|
}
|
|
}
|