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https://issues.apache.org/jira/browse/ARROW-15731?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Keane updated ARROW-15731:
-----------------------------------
Summary: [C++] Enable joins when data contains a list column (was: Enable
joins when data contains a list column)
> [C++] Enable joins when data contains a list column
> ---------------------------------------------------
>
> Key: ARROW-15731
> URL: https://issues.apache.org/jira/browse/ARROW-15731
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Stephanie Hazlitt
> Priority: Major
>
> Currently Arrow joins with data that contain a list column errors, even when
> the list column is not a join key:
> ``` r
> library(arrow)
> #>
> #> Attaching package: 'arrow'
> #> The following object is masked from 'package:utils':
> #>
> #> timestamp
> library(dplyr)
> #>
> #> Attaching package: 'dplyr'
> #> The following objects are masked from 'package:stats':
> #>
> #> filter, lag
> #> The following objects are masked from 'package:base':
> #>
> #> intersect, setdiff, setequal, union
> jedi <- data.frame(name = c("C-3PO", "Luke Skywalker"),
> jedi = c(FALSE, TRUE))
> arrow_table(starwars) %>%
> left_join(jedi) %>%
> collect()
> #> Error in `handle_csv_read_error()`:
> #> ! Invalid: Data type list<item: string> is not supported in join non-key
> field
> ```
> The ability to join would be a useful enhancement for workflows with tabular
> data where list columns can be common, and for geospatial workflows where
> geometry columns are stored as `list` or `fixed_size_list` (thanks
> [~paleolimbot] for mentioning that use case).
> Related discussion here: https://issues.apache.org/jira/browse/ARROW-14519
>
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