westonpace commented on issue #20383:
URL: https://github.com/apache/arrow/issues/20383#issuecomment-1414428836
Yes, reading those docs it appears that `closest` is a good fit. `(company
== id, closest(year >= since))` should equate to:
```
AsofJoinOptions(/*input_keys=*/{
{/*on_key=*/"year", /*by_key=*/{"company"}},
{/*on_key=*/"year", /*by_key=*/{"id"}}
}, "tolerance="since)
```
Although it might be `tolerance=-since`. I always get confused on that :)
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