Github user zero323 commented on the issue:
https://github.com/apache/spark/pull/17965
Points to discuss:
- Do we really need this. It gives us full API parity but is not strictly
necessary. `hint(df, "broadcast")` should be equivalent.
- Is this the best implementation? Some alternatives:
- Use generics for both and `signature(x = "SparkDataFrame",
"missing")` for `DataFrame` version and `signature(x = "jobj", object = "Any")`
for general version. This would keep internal API intact, but is hard to
document without leaking internal details.
- Use different name for `DataFrame` version, for example
`broadcast_table`. This is a bit verbose, and slightly harder to port for
users.
- Is `dataframe.R` the best location? It is generic on `SparkDataFrame` so
`functions.R` don't feel like a right choice.
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