"partitioning columns must form a subset of key columns of a UNIQUE index"
*Cause: User attempted to create a UNIQUE partitioned index whose
partitioning columns do not form a subset of its key columns
which is illegal
*Action: If the user, indeed, desired to create an index whose
partitioning columns do not form a subset of its key columns,
it must be created as non-UNIQUE; otherwise, correct the
list of key and/or partitioning columns to ensure that the index'
partitioning columns form a subset of its key columns