protected virtual unsafe int ReadLength(IRawFile headerBuff, long offset)
{
int isize;
headerBuff.ReadBytes(offset, (byte *)(&isize), 2);
return(isize);
}
public byte[] GetValue(long rowID, ReadContext readContext)
{
var byteArray = readContext.AllocateBitsetArray(_sizeBytes);
_storage.ReadBytes(rowID * _fieldSize + ISSET_HEADER_LENGTH,
byteArray, 0, _sizeBytes);
return(byteArray);
}
public byte[] GetBytes(long rowID, ReadContext readContext)
{
var beginOffset = _index.ReadInt64(rowID * MetadataConstants.STRING_INDEX_FILE_RECORD_SIZE);
if (beginOffset == MetadataConstants.INDEX_NULL_DATA_VALUE)
{
return(null);
}
var arrayLength = ReadLength(_data, beginOffset);
if (arrayLength == 0)
{
return(EMPTY_BYTE_ARRAY);
}
//var byteArray = readContext.AllocateByteArray2(arrayLength);
var byteArray = new byte[arrayLength];
_data.ReadBytes(beginOffset + HEADER_SIZE, byteArray, 0, arrayLength);
return(byteArray);
}
public TxRec Get()
{
if (IsEmpty())
{
return(null);
}
var tx = new TxRec();
var offset = GetTxAddress();
var initialOffset = offset;
int txSize = ReadInt32(ref offset);
tx.PrevTxAddress = ReadInt64(ref offset);
tx.Command = ReadByte(ref offset);
tx.Timestamp = ReadInt64(ref offset);
tx.JournalMaxRowID = ReadInt64(ref offset);
tx.LastPartitionTimestamp = ReadInt64(ref offset);
tx.LagSize = ReadInt64(ref offset);
var sz = ReadByte(ref offset);
if (sz == 0)
{
tx.LagName = null;
}
else
{
// lagName
sz = ReadByte(ref offset);
var nameBytes = new byte[sz];
_data.ReadBytes(offset, nameBytes, 0, sz);
tx.LagName = Encoding.ASCII.GetString(nameBytes);
offset += sz;
}
// symbolTableSizes
tx.SymbolTableSizes = ReadInt32Array(ref offset);
//symbolTableIndexPointers
tx.SymbolTableIndexPointers = ReadInt64Array(ref offset);
//indexPointers
tx.IndexPointers = ReadInt64Array(ref offset);
//lagIndexPointers
tx.LagIndexPointers = ReadInt64Array(ref offset);
return(tx);
}
private void CopyKeyBlock(PartitionTxData pd)
{
var sd = pd.SymbolData[_fileID];
var newBlockOffset = pd.AppendOffset[_fileID];
var currentBlockOffset = sd.KeyBlockOffset;
CheckKeyBlockOffset(currentBlockOffset);
var currentBlockLen = sd.KeyBlockSize;
if (currentBlockLen > 0)
{
var keyBlockBuff = pd.ReadCache.AllocateCopyKeyBlockArray(currentBlockLen);
_kData.ReadBytes(currentBlockOffset, keyBlockBuff, 0, currentBlockLen);
_kData.WriteBytes(newBlockOffset, keyBlockBuff, 0, currentBlockLen);
sd.KeyBlockOffset = newBlockOffset;
sd.KeyBlockCreated = true;
}
}
