////////////////////////////////////////////////////////////////////////////
bool ColsAreKey(Index index, int col1, int col2)
{
int[] hashtable = index.hashtable;
long[] bucket = new long[32];
for (int i = 0; i < hashtable.Length; i++)
{
int count = 0;
int idx = hashtable[i];
while (idx != Empty)
{
int offset = 3 * idx;
long arg1 = flatTuples[offset + col1];
long arg2 = flatTuples[offset + col2];
long packedArgs = arg1 | (arg2 << 32);
Debug.Assert(arg1 == (packedArgs & 0xFFFFFFFFL));
Debug.Assert(arg2 == Miscellanea.UnsignedLeftShift64(packedArgs, 32));
bucket = Array.Append(bucket, count++, packedArgs);
idx = index.Next(idx);
}
if (count > 1)
{
if (count > 2)
{
Array.Sort(bucket, count);
}
long last = bucket[0];
for (int j = 1; j < count; j++)
{
long val = bucket[j];
if (val == last)
{
return(false);
}
last = val;
}
}
}
return(true);
}
public static int High(long slot)
{
return((int)Miscellanea.UnsignedLeftShift64(slot, 32));
}