[FEA] Support strong index types in other cudf::experimental::row:: comparators and hashers

[ttnghia]

When we have multiple tables to compare, we need strong index types. On the other hand, when we just do one table operations like comparing or hashing rows of the same table, we typically don't need these strong types.

However, sometimes we actually need to support strong types in these self- operations. For example, we create a hash map with strong index types. In such cases, row comparator and hasher need to operate on strong index types.

[ttnghia]

CC @bdice for awareness.

[github-actions]

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[github-actions]

This issue has been labeled inactive-90d due to no recent activity in the past 90 days. Please close this issue if no further response or action is needed. Otherwise, please respond with a comment indicating any updates or changes to the original issue and/or confirm this issue still needs to be addressed.

[GregoryKimball]

sometimes we actually need to support strong types in these self- operations

@ttnghia would you please elaborate on this use case? What code changes would you propose?

This issue references competed work in #10730

[ttnghia]

The use cases already existed, and implementation of this FEA was added here:

• cudf/cpp/src/search/contains_table.cu

  Line 65 in 7d173c9

  struct strong_index_hasher_adapter {

• cudf/cpp/src/search/contains_table.cu

  Line 83 in 7d173c9

  struct strong_index_comparator_adapter {

I proposed this issue and already made a draft PR but that was not approved so I had to implement it locally only in that file.