2022-01-30 00:05:02 +01:00
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#include "../lmdb-safe.hh"
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2018-12-09 14:37:08 +01:00
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2019-10-24 17:56:45 +02:00
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#include <unistd.h>
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2022-01-18 22:08:36 +01:00
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using namespace std;
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using namespace LMDBSafe;
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2018-12-09 14:37:08 +01:00
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int main()
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{
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2022-01-30 21:32:08 +01:00
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unlink("./multi");
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2022-01-30 22:23:43 +01:00
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auto env = getMDBEnv("./multi.lmdb", MDB_NOSUBDIR, 0600);
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2022-01-30 21:32:08 +01:00
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auto dbi = env->openDB("qnames", MDB_DUPSORT | MDB_CREATE);
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auto txn = env->getRWTransaction();
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txn->clear(dbi);
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txn->put(dbi, "bdb", "old");
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txn->put(dbi, "lmdb", "hot");
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txn->put(dbi, "lmdb", "fast");
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txn->put(dbi, "lmdb", "zooms");
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txn->put(dbi, "lmdb", "c");
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txn->put(dbi, "mdb", "old name");
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string_view v1;
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if (!txn->get(dbi, "mdb", v1)) {
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cout << v1 << endl;
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} else {
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cout << "found nothing" << endl;
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}
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txn->commit();
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txn = env->getRWTransaction();
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auto cursor = txn->getRWCursor(dbi);
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MDBOutVal key, data;
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for (int rc = cursor.find("lmdb", key, data); !rc; rc = cursor.get(key, data, MDB_NEXT_DUP)) {
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cout << key.get<string_view>() << " = " << data.get<string_view>() << endl;
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}
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cout << "Dump of complete database: " << endl;
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for (int rc = cursor.first(key, data); !rc; rc = cursor.next(key, data)) {
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cout << key.get<string_view>() << " = " << data.get<string_view>() << endl;
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}
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cout << "Done!" << endl;
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cout << "Now going to delete 'lmdb' keys" << endl;
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for (int rc = cursor.first(key, data); !rc; rc = cursor.next(key, data)) {
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if (key.get<string_view>() == "lmdb")
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cursor.del();
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}
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cout << "Complete database after deleting 'lmdb' keys: " << endl;
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for (int rc = cursor.first(key, data); !rc; rc = cursor.next(key, data)) {
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cout << key.get<string_view>() << " = " << data.get<string_view>() << endl;
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}
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2018-12-09 14:37:08 +01:00
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}
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