wiedld commented on code in PR #14329:
URL: https://github.com/apache/datafusion/pull/14329#discussion_r1937693958
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datafusion/expr/src/logical_plan/extension.rs:
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@@ -54,6 +57,22 @@ pub trait UserDefinedLogicalNode: fmt::Debug + Send + Sync {
/// Return the output schema of this logical plan node.
fn schema(&self) -> &DFSchemaRef;
+ /// Return the list of invariants.
+ ///
+ /// Implementing this function enables the user to define the
+ /// invariants for a given logical plan extension.
+ fn invariants(&self) -> Vec<Invariant> {
+ vec![]
+ }
+
+ /// Perform check of invariants for the extension node.
+ fn check_invariants(&self, check: InvariantLevel, plan: &LogicalPlan) ->
Result<()> {
Review Comment:
Removed the use of the `Invariant` API with the encapsulated FnMut. Since
it's unnecessary complication if we are not providing invariant FnMut checks
run over the builtin logical node.
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