memgraph/example/index.cpp

60 lines
1.1 KiB
C++

#include <iostream>
#include "transactions/engine.hpp"
#include "mvcc/version_list.hpp"
#include "storage/vertex.hpp"
#include "storage/indexes/property_index.hpp"
using std::cout;
using std::endl;
using Record = mvcc::VersionList<Vertex>;
tx::Engine engine;
Index<Vertex>* index = new PropertyIndex<Vertex>();
Record* create(int id, tx::Transaction& t)
{
auto v = new record_t(id);
auto a = v->access(t);
a.insert();
return v;
}
auto insert(int id, tx::Transaction& t)
{
auto r = create(id, t);
return index.insert(&r->id, r, t);
}
int main(void)
{
/* v1->data.props.set<String>("name", "buda"); */
/* v1->data.props.set<Int32>("age", 23); */
auto& t1 = engine.begin();
insert(0, t1);
insert(1, t1);
insert(2, t1);
insert(3, t1);
insert(6, t1);
insert(7, t1);
t1.commit();
auto& t2 = engine.begin();
insert(4, t2);
insert(5, t2);
insert(8, t2);
t2.commit();
auto& t3 = engine.begin();
auto cursor = index.scan(8, t3);
for(; not cursor.end(); cursor++)
cout << cursor->id() << endl;
return 0;
}