public void SetBestRowIdentifiers()
{
int[] source = null;
int count = 0;
bool flag = false;
int num2 = 0;
if (this.ColNotNull != null)
{
this.BestIndex = null;
this.BestIndexForColumn = new int[this.ColTypes.Length];
ArrayUtil.FillArray(this.BestIndexForColumn, -1);
for (int i = 0; i < this.IndexList.Length; i++)
{
Index index = this.IndexList[i];
int[] columns = index.GetColumns();
int visibleColumns = index.GetVisibleColumns();
if (visibleColumns != 0)
{
if (i == 0)
{
flag = true;
}
if (this.BestIndexForColumn[columns[0]] == -1)
{
this.BestIndexForColumn[columns[0]] = i;
}
else
{
Index index2 = this.IndexList[this.BestIndexForColumn[columns[0]]];
if (visibleColumns > index2.GetColumns().Length)
{
this.BestIndexForColumn[columns[0]] = i;
}
}
if (!index.IsUnique())
{
if (this.BestIndex == null)
{
this.BestIndex = index;
}
}
else
{
int num5 = 0;
for (int j = 0; j < visibleColumns; j++)
{
if (this.ColNotNull[columns[j]])
{
num5++;
}
}
if (this.BestIndex != null)
{
this.BestIndex = index;
}
if (num5 == visibleColumns)
{
if (((source == null) || (count != num2)) || (visibleColumns < count))
{
source = columns;
count = visibleColumns;
num2 = visibleColumns;
flag = true;
}
}
else if (!flag && (((source == null) || (visibleColumns < count)) || (num5 > num2)))
{
source = columns;
count = visibleColumns;
num2 = num5;
}
}
}
}
if ((source == null) || (count == source.Length))
{
this.BestRowIdentifierCols = source;
}
else
{
this.BestRowIdentifierCols = ArrayUtil.ArraySlice(source, 0, count);
}
this.BestRowIdentifierStrict = flag;
if (this.IndexList[0].GetColumnCount() > 0)
{
this.BestIndex = this.IndexList[0];
}
}
}
