40   Transaction* txn = txn_db->BeginTransaction(write_options);  in main()  local
41   assert(txn);  in main()
44   s = txn->Get(read_options, "abc", &value);  in main()
48   s = txn->Put("abc", "def");  in main()
66   s = txn->Get(read_options, "xyz", &value);  in main()
71   s = txn->Commit();  in main()
73   delete txn;  in main()
89   txn = txn_db->BeginTransaction(write_options, txn_options);  in main()
91   const Snapshot* snapshot = txn->GetSnapshot();  in main()
98   s = txn->Get(read_options, "abc", &value);  in main()
104   s = txn->Get(read_options, "abc", &value);  in main()
110   s = txn->GetForUpdate(read_options, "abc", &value);  in main()
113   txn->Rollback();  in main()
116   delete txn;  in main()
134   txn = txn_db->BeginTransaction(write_options, txn_options);  in main()
138   s = txn->Get(read_options, "x", &value);  in main()
140   s = txn->Put("x", "x");  in main()
148   txn->SetSnapshot();  in main()
149   txn->SetSavePoint();  in main()
155   s = txn->GetForUpdate(read_options, "y", &value);  in main()
158   s = txn->Put("y", "y2");  in main()
162   txn->RollbackToSavePoint();  in main()
165   s = txn->Commit();  in main()
167   delete txn;  in main()