示例#1
0
 @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();
 }
示例#2
0
  @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());
  }