public override Table CreateGroupTable(long groupIndex)
{
if (IsGroupDegenerate(groupIndex))
{
// if sub table is an expand table, act as pass-through
if (m_expandTable != null)
{
var i = m_Groups[groupIndex].m_GroupIndice[0];
return(m_expandTable.CreateGroupTable(i));
}
}
if (m_createGroupTable != null)
{
return(m_createGroupTable(this, m_Groups[groupIndex], groupIndex));
}
int subGroupColumn = m_GroupedColumnFirst + 1;
if (subGroupColumn < m_GroupedColumnLast)
{
GroupedTable subTable = new GroupedTable(m_table, m_Groups[groupIndex].m_GroupIndice, subGroupColumn, m_GroupedColumnLast, m_ColumnOrder, m_SortOrder);
return(subTable);
}
else if (subGroupColumn < m_ColumnOrder.Length)
{
//create a sorted table only
SortedTable subTable = new SortedTable(m_table, m_ColumnOrder, m_SortOrder, subGroupColumn, m_Groups[groupIndex].m_GroupIndice);
return(subTable);
}
else
{
//create indexed table
IndexedTable subTable = new IndexedTable(m_table, m_Groups[groupIndex].m_GroupIndice);
return(subTable);
}
}
public void Initialize(GroupedTable table, Column column, int columnIndex, Grouping.IMergeAlgorithm algo, bool isGroup)
{
base.Initialize(table, column, columnIndex);
m_GroupTable = table;
algorithm = algo;
m_IsGroupKey = isGroup;
m_GroupComputed = new bool[table.m_Groups.Length];
m_GroupData = new DataT[table.m_Groups.Length];
}