39 lines
904 B
C++
39 lines
904 B
C++
#include "lmdb-safe.hh"
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int main()
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{
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auto env = getMDBEnv("multi", 0, 0600);
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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, "mdb", "old name");
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std::string_view v1;
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if(!txn.get(dbi, "mdb", v1)) {
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cout<<v1<<endl;
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}
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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.getCursor(dbi);
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int count=0;
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MDB_val key{4, (char*)"lmdb"};
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MDB_val data{0,0};
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int rc=0;
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while(!(rc=cursor.get(key, data, count ? MDB_NEXT_DUP : MDB_SET))) {
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std::string_view k((char*)key.mv_data, key.mv_size);
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std::string_view v((char*)data.mv_data, data.mv_size);
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cout << k << " = " << v <<endl;
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++count;
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}
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}
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