ethe opened a new pull request, #2643:
URL: https://github.com/apache/arrow-datafusion/pull/2643
# Which issue does this PR close?
Closes #1478.
# Rationale for this change
In current, datafusion couples tokio, it does not allows users to customized
the async executor in some performance sensitive cases. Therefore, we add an
interface which names `AsyncExecutor`, replace all `tokio::spawn` to
`AsyncExecutor::execute`, to make async executor replacable.
# What changes are included in this PR?
- `generic_associated_types` feature requires in datafusion::core (we could
discussed about this change)
- add `async_executor.rs` file into `datafusion/core/src/execution`
# Are there any user-facing changes?
No, there are not. We use Tokio runtime as the default executor in any
currently cases.
# Does this PR break compatibility with Ballista?
I am not sure, but probably not.
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