void CommandOpen(const char *method, const char *table)
{
if (numTables == MAX_TABLES) {
cout << "This progam can only handle "<<MAX_TABLES<<" open tables.\n";
return;
}
if (GetTable(table) != NOT_FOUND) {
cout << "Table already open!\n";
return;
}
if (strcmp(method, "btree")) {
cerr << "The only supported method is btree.\n";
return;
}
GiST *gist = new BT;
gist->Open(table);
if (!gist->IsOpen()) {
delete gist;
cout << "Error opening table.\n";
return;
}
cout << "Table " << table << " opened.\n";
tables[numTables].gist = gist;
tables[numTables].name = strdup(table);
numTables++;
}
void CommandInsert(const char *table,
const BTkey& key,
int ptr)
{
int i;
if ((i = GetTable(table)) == NOT_FOUND) {
cerr << "Table not open!\n";
return;
}
GiST *gist = tables[i].gist;
gist->Insert(BTentry(key, ptr));
cout << "(" << key << ", " << ptr << ") inserted into " << table << ".\n";
}
void CommandInsert(const char *table,
const BTkey& key,
int value)
{
int i;
if ((i = GetTable(table)) == NOT_FOUND) {
cerr << "Table not open!\n";
return;
}
Record* rec = new_in(db, Record);
rec->value = value;
GiST *gist = tables[i].gist;
gist->Insert(BTentry(key, (GiSTpage)rec));
cout << "(" << key << ", " << value << ") inserted into " << table << ".\n";
}
void CommandSelect(const char *table,
const GiSTpredicate& pred)
{
int i;
i = GetTable(table);
if (i == NOT_FOUND) {
cerr << "Table is not open!\n";
return;
}
GiST *gist = tables[i].gist;
GiSTcursor *c = gist->Search(pred);
GiSTentry *e;
while ((e = c->Next()) != NULL) {
cout << e;
delete e;
}
delete c;
}
void CommandCreate(const char *method,
const char *table)
{
if (numTables == MAX_TABLES) {
cout << "This progam can only handle "<<MAX_TABLES<<" open tables.\n";
return;
}
if (GetTable(table) != NOT_FOUND) {
cerr << "Table already open!\n";
return;
}
if (strcmp(method, "btree")) {
cerr << "The only supported method is btree.\n";
return;
}
GiST *gist = new BT(db);
GiST_POST_Root* root = (GiST_POST_Root*)db.get_root_object();
if (root == NULL) {
root = new_in(db, GiST_POST_Root)(db);
db.set_root_object(root);
}
gist->Create(table);
if (!gist->IsOpen()) {
cout << "Error opening table.\n";
delete gist;
return;
}
cout << "Table " << table << " created as type " << method << ".\n";
tables[numTables].name = strdup(table);
tables[numTables].gist = gist;
numTables++;
}
