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Be aware that the p attribute is not directly correlated with whether a table is partitioned or not. A table being partitioned refers to the fact that it stored inside multiple partition directories within the database. A column having the p attribute means that the data in the column is ordered in contiguous, unique blocks.
You will at least have to update the columns with the p attribute manually and you may have to re-sort the data in each of the partitions for the table.