ctsk commented on code in PR #15712:
URL: https://github.com/apache/datafusion/pull/15712#discussion_r2044124081
##########
datafusion/common/src/config.rs:
##########
@@ -768,7 +768,18 @@ impl ConfigField for ConfigOptions {
let (key, rem) = key.split_once('.').unwrap_or((key, ""));
match key {
"catalog" => self.catalog.set(rem, value),
- "execution" => self.execution.set(rem, value),
+ "execution" => {
+ let value = match (rem, value) {
+ ("target_partitions", "0") => {
+
&ExecutionOptions::default().target_partitions.to_string()
+ }
+ ("planning_concurrency", "0") => {
+
&ExecutionOptions::default().planning_concurrency.to_string()
+ }
+ _ => value,
+ };
+ self.execution.set(rem, value)
+ }
Review Comment:
I'd make this a transform - a single dedicated function should work, since
both `target_partitions` and `planning_concurrency` default to
`get_available_parallelism`
Something like:
```rs
fn normalized_parallelism(n: &str) -> String {
if n.parse::<usize>() == Ok(0) {
get_available_parallelism().to_string()
} else {
n.to_owned()
}
}
```
##########
datafusion/execution/src/config.rs:
##########
@@ -193,9 +193,11 @@ impl SessionConfig {
///
/// [`target_partitions`]:
datafusion_common::config::ExecutionOptions::target_partitions
pub fn with_target_partitions(mut self, n: usize) -> Self {
- // partition count must be greater than zero
- assert!(n > 0);
- self.options.execution.target_partitions = n;
+ self.options.execution.target_partitions = if n == 0 {
+
datafusion_common::config::ExecutionOptions::default().target_partitions
+ } else {
+ n
+ };
Review Comment:
👍
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