[OP] Join onto external dataframe, file, dictionary

[benfred]

Issue by EvenOldridge
Thursday Mar 26, 2020 at 02:22 GMT
Originally opened as https://github.com/rapidsai/recsys/issues/32

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Is your operator request related to a problem? Please describe.
Outbrains dataset

Join to external data in multiple formats. This mechanism will also be used / shared by https://github.com/rapidsai/recsys/issues/31 to apply the groupby operations.

Describe the solution you'd like

• Type: Feature Engineering
• input column type(s): [Categorical]
• input options:
  • Columns to join off of: [Categorical] (just in case naming isn't the same?)
  • Categorical column names to be joined
  • Continuous column names to be joined
• Expected transformation of the data after application: Data is joined

Optional: Describe operation stages in detail*
Statistics per chunk: N/A
Statistics combine: N/A
Apply: Join

Context:
Note that this is meant to be an iterator to gdf join and not an iterator to iterator join which we'll figure out in the future.

[rnyak]

Related cudf issue: rapidsai/cudf#5621

[benfred]

We should pass in a nvtabular.Dataset to the operator - and merge with the groupby apply