@Override
public Value[] next() {
if (resultCursor == null) {
Index idx;
if (distinct || sort != null) {
idx = index;
} else {
idx = table.getScanIndex(session);
}
if (session.getDatabase().getMvStore() != null) {
// sometimes the transaction is already committed,
// in which case we can't use the session
if (idx.getRowCount(session) == 0 && rowCount > 0) {
// this means querying is not transactional
resultCursor = idx.find((Session) null, null, null);
} else {
// the transaction is still open
resultCursor = idx.find(session, null, null);
}
} else {
resultCursor = idx.find(session, null, null);
}
}
if (!resultCursor.next()) {
return null;
}
Row row = resultCursor.get();
return row.getValueList();
}
@Override
public void add(Session session, Row row) {
if (mainIndexColumn == -1) {
if (row.getKey() == 0) {
row.setKey(++lastKey);
}
} else {
long c = row.getValue(mainIndexColumn).getLong();
row.setKey(c);
}
if (mvTable.getContainsLargeObject()) {
for (int i = 0, len = row.getColumnCount(); i < len; i++) {
Value v = row.getValue(i);
Value v2 = v.link(database, getId());
if (v2.isLinked()) {
session.unlinkAtCommitStop(v2);
}
if (v != v2) {
row.setValue(i, v2);
}
}
}
TransactionMap<Value, Value> map = getMap(session);
Value key = ValueLong.get(row.getKey());
Value old = map.getLatest(key);
if (old != null) {
String sql = "PRIMARY KEY ON " + table.getSQL();
if (mainIndexColumn >= 0 && mainIndexColumn < indexColumns.length) {
sql += "(" + indexColumns[mainIndexColumn].getSQL() + ")";
}
DbException e = DbException.get(ErrorCode.DUPLICATE_KEY_1, sql);
e.setSource(this);
throw e;
}
try {
map.put(key, ValueArray.get(row.getValueList()));
} catch (IllegalStateException e) {
throw DbException.get(ErrorCode.CONCURRENT_UPDATE_1, table.getName());
}
lastKey = Math.max(lastKey, row.getKey());
}
