public int getPartitionKey(IScalar partitionCol)
{
if (partitionCol.getDataCategory() != cat)
{
throw new Exception("Data category incompatible.");
}
if (cat == DATA_CATEGORY.TEMPORAL && type != partitionCol.getDataType())
{
//类型转化
DATA_TYPE old = partitionCol.getDataType();
partitionCol = (IScalar)Utils.castDateTime(partitionCol, type);
if (partitionCol == null)
{
throw new Exception("Can't convert type from " + old.ToString() + " to " + type.ToString());
}
}
int rows = partitionCol.rows();
int key = partitionCol.hashBucket(buckets);
return(key);
}