private void AddRowToRowIndex(TableContextRowID rowID)
{
// Add the row to the list
m_rowIndex.Add(rowID);
// add the row to the BTH
BTreeOnHeap <TableContextRowID> bTreeOnHeap = new BTreeOnHeap <TableContextRowID>(m_heap, m_tcInfo.hidRowIndex);
bTreeOnHeap.AddRecord(rowID);
}
private void DeleteLastRowFromRowIndex()
{
uint rowID = m_rowIndex[m_rowIndex.Count - 1].dwRowID;
m_rowIndex.RemoveAt(m_rowIndex.Count - 1);
BTreeOnHeap <TableContextRowID> bTreeOnHeap = new BTreeOnHeap <TableContextRowID>(m_heap, m_tcInfo.hidRowIndex);
bTreeOnHeap.RemoveRecord(LittleEndianConverter.GetBytes(rowID));
}
private Subnode m_subnodeRows; // for buffering purposes
public TableContext(HeapOnNode heap, SubnodeBTree subnodeBTree)
{
m_heap = heap;
m_subnodeBTree = subnodeBTree;
m_tcInfo = new TableContextInfo(m_heap.GetHeapItem(m_heap.HeapHeader.hidUserRoot));
BTreeOnHeap <TableContextRowID> bTreeOnHeap = new BTreeOnHeap <TableContextRowID>(m_heap, m_tcInfo.hidRowIndex);
if (bTreeOnHeap.BTreeHeader.hidRoot.hidIndex > 0) // hidRoot is set to zero if the BTH is empty.
{
m_rowIndex = bTreeOnHeap.GetAll();
m_rowIndex.Sort(TableContextRowID.CompareByRowIndex);
}
m_rowsPerBlock = (int)Math.Floor((double)DataBlock.MaximumDataLength / RowLength);
}
/// <summary>
/// For discovery purposes
/// </summary>
public List <string> ListRowIndex()
{
List <string> result = new List <string>();
BTreeOnHeap <TableContextRowID> bTreeOnHeap = new BTreeOnHeap <TableContextRowID>(m_heap, m_tcInfo.hidRowIndex);
if (bTreeOnHeap.BTreeHeader.hidRoot.hidIndex > 0) // hidRoot is set to zero if the BTH is empty.
{
result.Add("Index levels: " + bTreeOnHeap.BTreeHeader.bIdxLevels);
}
for (int rowIndex = 0; rowIndex < m_rowIndex.Count; rowIndex++)
{
result.Add(String.Format("RowIndex: {0}, RowID: {1}", m_rowIndex[rowIndex].dwRowIndex, m_rowIndex[rowIndex].dwRowID));
}
return(result);
}
private void SwitchRowsInRowIndex(int rowIndex1, int rowIndex2)
{
TableContextRowID record1 = m_rowIndex[rowIndex1];
TableContextRowID record2 = m_rowIndex[rowIndex2];
uint temp = record1.dwRowIndex;
record1.dwRowIndex = record2.dwRowIndex;
record2.dwRowIndex = temp;
m_rowIndex[rowIndex1] = record2;
m_rowIndex[rowIndex2] = record1;
BTreeOnHeap <TableContextRowID> bTreeOnHeap = new BTreeOnHeap <TableContextRowID>(m_heap, m_tcInfo.hidRowIndex);
bTreeOnHeap.UpdateRecord(record1);
bTreeOnHeap.UpdateRecord(record2);
}