示例#1
0
 /**
  * Get the row at the given index.
  *
  * @param at the index
  * @return the row
  */
 Row getRowAt(int at) {
   Row r = rows[at];
   if (r == null) {
     if (firstOverflowPageId == 0) {
       r = readRow(data, offsets[at], columnCount);
     } else {
       if (rowRef != null) {
         r = rowRef.get();
         if (r != null) {
           return r;
         }
       }
       PageStore store = index.getPageStore();
       Data buff = store.createData();
       int pageSize = store.getPageSize();
       int offset = offsets[at];
       buff.write(data.getBytes(), offset, pageSize - offset);
       int next = firstOverflowPageId;
       do {
         PageDataOverflow page = index.getPageOverflow(next);
         next = page.readInto(buff);
       } while (next != 0);
       overflowRowSize = pageSize + buff.length();
       r = readRow(buff, 0, columnCount);
     }
     r.setKey(keys[at]);
     if (firstOverflowPageId != 0) {
       rowRef = new SoftReference<Row>(r);
     } else {
       rows[at] = r;
       memoryChange(true, r);
     }
   }
   return r;
 }
示例#2
0
 @Override
 public Row getRow(Session session, long key) {
   TransactionMap<Value, Value> map = getMap(session);
   Value v = map.get(ValueLong.get(key));
   ValueArray array = (ValueArray) v;
   Row row = new Row(array.getList(), 0);
   row.setKey(key);
   return row;
 }
示例#3
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());
  }
示例#4
0
 @Override
 public Row get() {
   if (row == null) {
     if (current != null) {
       ValueArray array = (ValueArray) current.getValue();
       row = session.createRow(array.getList(), 0);
       row.setKey(current.getKey().getLong());
     }
   }
   return row;
 }
示例#5
0
 /**
  * Read a row from an input stream.
  *
  * @param in the input stream
  * @param data a temporary buffer
  * @return the row
  */
 public static Row readRow(DataReader in, Data data) throws IOException {
   long key = in.readVarLong();
   int len = in.readVarInt();
   data.reset();
   data.checkCapacity(len);
   in.readFully(data.getBytes(), len);
   int columnCount = data.readVarInt();
   Value[] values = new Value[columnCount];
   for (int i = 0; i < columnCount; i++) {
     values[i] = data.readValue();
   }
   Row row = new Row(values, Row.MEMORY_CALCULATE);
   row.setKey(key);
   return row;
 }
示例#6
0
 /**
  * Partially roll back the current transaction.
  *
  * @param savepoint the savepoint to which should be rolled back
  * @param trimToSize if the list should be trimmed
  */
 public void rollbackTo(Savepoint savepoint, boolean trimToSize) {
   int index = savepoint == null ? 0 : savepoint.logIndex;
   while (undoLog.size() > index) {
     UndoLogRecord entry = undoLog.getLast();
     entry.undo(this);
     undoLog.removeLast(trimToSize);
   }
   if (transaction != null) {
     long savepointId = savepoint == null ? 0 : savepoint.transactionSavepoint;
     HashMap<String, MVTable> tableMap = database.getMvStore().getTables();
     Iterator<Change> it = transaction.getChanges(savepointId);
     while (it.hasNext()) {
       Change c = it.next();
       MVTable t = tableMap.get(c.mapName);
       if (t != null) {
         long key = ((ValueLong) c.key).getLong();
         ValueArray value = (ValueArray) c.value;
         short op;
         Row row;
         if (value == null) {
           op = UndoLogRecord.INSERT;
           row = t.getRow(this, key);
         } else {
           op = UndoLogRecord.DELETE;
           row = new Row(value.getList(), Row.MEMORY_CALCULATE);
         }
         row.setKey(key);
         UndoLogRecord log = new UndoLogRecord(t, op, row);
         log.undo(this);
       }
     }
   }
   if (savepoints != null) {
     String[] names = new String[savepoints.size()];
     savepoints.keySet().toArray(names);
     for (String name : names) {
       Savepoint sp = savepoints.get(name);
       int savepointIndex = sp.logIndex;
       if (savepointIndex > index) {
         savepoints.remove(name);
       }
     }
   }
 }
示例#7
0
 private Row readRow(Data buff) {
   if (buff.readByte() == 0) {
     return null;
   }
   int mem = buff.readInt();
   int columnCount = buff.readInt();
   long key = buff.readLong();
   int version = buff.readInt();
   if (readUncached) {
     key = 0;
   }
   boolean deleted = buff.readInt() == 1;
   int sessionId = buff.readInt();
   Value[] values = new Value[columnCount];
   for (int i = 0; i < columnCount; i++) {
     Value v;
     if (buff.readByte() == 0) {
       v = null;
     } else {
       v = buff.readValue();
       if (v.isLinked()) {
         // the table id is 0 if it was linked when writing
         // a temporary entry
         if (v.getTableId() == 0) {
           session.unlinkAtCommit(v);
         }
       }
     }
     values[i] = v;
   }
   Row row = new Row(values, mem);
   row.setKey(key);
   row.setVersion(version);
   row.setDeleted(deleted);
   row.setSessionId(sessionId);
   return row;
 }
示例#8
0
文件: Row.java 项目: projetaty/kernel
 public void setKeyAndVersion(SearchRow row) {
   setKey(row.getKey());
   setVersion(row.getVersion());
 }