void DRTupleStream::writeRowTuple(TableTuple& tuple,
size_t rowHeaderSz,
size_t rowMetadataSz,
const std::vector<int> *interestingColumns,
const std::pair<const TableIndex*, uint32_t> &indexPair,
ExportSerializeOutput &io) {
size_t startPos = io.position();
// initialize the full row header to 0. This also
// has the effect of setting each column non-null.
::memset(m_currBlock->mutableDataPtr() + io.position(), 0, rowHeaderSz);
// the nullarray lives in rowheader after the 4 byte header length prefix
uint8_t *nullArray =
reinterpret_cast<uint8_t*>(m_currBlock->mutableDataPtr() + io.position() + rowMetadataSz);
// Reserve the row header by moving the position beyond the row header.
// The row header includes the 4 byte length prefix and the null array.
const size_t lengthPrefixPosition = io.reserveBytes(rowHeaderSz);
tuple.serializeToDR(io, 0, nullArray, interestingColumns);
ExportSerializeOutput hdr(m_currBlock->mutableDataPtr() + lengthPrefixPosition, rowMetadataSz);
if (interestingColumns) {
// add the row length and a crc of the index used to the header
hdr.writeInt((int32_t)(io.position() - startPos - 2 * sizeof(int32_t)));
hdr.writeInt(indexPair.second);
} else {
// add the row length to the header
hdr.writeInt((int32_t)(io.position() - startPos - sizeof(int32_t)));
}
}
void CompatibleDRTupleStream::writeRowTuple(TableTuple& tuple,
size_t rowHeaderSz,
size_t rowMetadataSz,
ExportSerializeOutput &io) {
size_t startPos = io.position();
// initialize the full row header to 0. This also
// has the effect of setting each column non-null.
::memset(m_currBlock->mutableDataPtr() + io.position(), 0, rowHeaderSz);
// the nullarray lives in rowheader after the 4 byte header length prefix
uint8_t *nullArray =
reinterpret_cast<uint8_t*>(m_currBlock->mutableDataPtr() + io.position() + rowMetadataSz);
// Reserve the row header by moving the position beyond the row header.
// The row header includes the 4 byte length prefix and the null array.
const size_t lengthPrefixPosition = io.reserveBytes(rowHeaderSz);
tuple.serializeToDR(io, 0, nullArray);
ExportSerializeOutput hdr(m_currBlock->mutableDataPtr() + lengthPrefixPosition, rowMetadataSz);
// add the row length to the header
hdr.writeInt((int32_t)(io.position() - startPos - sizeof(int32_t)));
}