Weijun-H commented on code in PR #18408:
URL: https://github.com/apache/datafusion/pull/18408#discussion_r2508214717
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datafusion/core/src/execution/context/mod.rs:
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@@ -1101,7 +1110,36 @@ impl SessionContext {
drop(state);
}
- self.return_empty_dataframe()
+ Ok(())
+ }
+
+ async fn reset_variable(&self, stmt: ResetVariable) -> Result<()> {
+ let variable = stmt.variable;
+ if variable.starts_with("datafusion.runtime.") {
+ return self.reset_runtime_variable(&variable);
+ }
+
+ let mut state = self.state.write();
+ state.config_mut().options_mut().reset(&variable)?;
+
+ // Refresh UDFs to ensure configuration-dependent behavior updates
+ let config_options = state.config().options();
+ let udfs_to_update: Vec<_> = state
+ .scalar_functions()
+ .values()
+ .filter_map(|udf| {
+ udf.inner()
+ .with_updated_config(config_options)
+ .map(Arc::new)
+ })
+ .collect();
+
+ for udf in udfs_to_update {
+ state.register_udf(udf)?;
+ }
+
+ drop(state);
Review Comment:
Removed it because it is not needed.
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