The RMU Populate_Cache command allows one or more tables and
    indexes to be read from the database and stored in caches if they
    exist.

    Sorted indexes are read top-down, one index level at a time.
    Hashed indexes are read by sequentially scanning the storage
    areas containing the hashed indexes and fetching all nodes and
    the system record from each database page. Data table rows are
    read by sequentially scanning the storage areas containing the
    table and fetching all rows of the relation.