diff --git a/optd-core/src/cascades/memo.rs b/optd-core/src/cascades/memo.rs
index b46296d1..ec102ad5 100644
--- a/optd-core/src/cascades/memo.rs
+++ b/optd-core/src/cascades/memo.rs
@@ -495,37 +495,6 @@ impl<T: RelNodeTyp> Memo<T> {
         grp.unwrap().info = group_info;
     }
 
-    /// Gets the best group binding with metadata collected.
-    pub fn get_best_group_binding_with_meta(
-        &self,
-        group_id: GroupId,
-        meta: &mut RelNodeMetaMap,
-    ) -> Result<RelNodeRef<T>> {
-        let info = self.get_group_info(group_id);
-        if let Some(winner) = info.winner {
-            if !winner.impossible {
-                let expr_id = winner.expr_id;
-                let expr = self.get_expr_memoed(expr_id);
-                let mut children = Vec::with_capacity(expr.children.len());
-                for child in &expr.children {
-                    children.push(self.get_best_group_binding_with_meta(*child, meta)?);
-                }
-                let node = Arc::new(RelNode {
-                    typ: expr.typ.clone(),
-                    children,
-                    data: expr.data.clone(),
-                });
-
-                meta.insert(
-                    node.as_ref() as *const _ as usize,
-                    RelNodeMeta::new(group_id),
-                );
-                return Ok(node);
-            }
-        }
-        bail!("no best group binding for group {}", group_id)
-    }
-
     pub fn get_best_group_binding(
         &self,
         group_id: GroupId,
diff --git a/optd-core/src/cascades/optimizer.rs b/optd-core/src/cascades/optimizer.rs
index f6a421d1..a2e4ea7b 100644
--- a/optd-core/src/cascades/optimizer.rs
+++ b/optd-core/src/cascades/optimizer.rs
@@ -10,7 +10,7 @@ use crate::{
     cost::CostModel,
     optimizer::Optimizer,
     property::{PropertyBuilder, PropertyBuilderAny},
-    rel_node::{RelNodeMeta, RelNodeMetaMap, RelNodeRef, RelNodeTyp},
+    rel_node::{RelNodeMetaMap, RelNodeRef, RelNodeTyp},
     rules::RuleWrapper,
 };
 
diff --git a/optd-core/src/rel_node.rs b/optd-core/src/rel_node.rs
index 9f356c6d..bcb474ae 100644
--- a/optd-core/src/rel_node.rs
+++ b/optd-core/src/rel_node.rs
@@ -203,8 +203,10 @@ impl<T: RelNodeTyp> RelNode<T> {
     }
 }
 
+/// Metadata for a rel node.
 #[derive(Clone, Debug, PartialEq)]
 pub struct RelNodeMeta {
+    /// The group (id) of the `RelNode`
     pub group_id: GroupId,
 }
 
diff --git a/optd-datafusion-bridge/src/from_optd.rs b/optd-datafusion-bridge/src/from_optd.rs
index 31a0c1ea..7765a082 100644
--- a/optd-datafusion-bridge/src/from_optd.rs
+++ b/optd-datafusion-bridge/src/from_optd.rs
@@ -595,13 +595,18 @@ impl OptdPlanContext<'_> {
             typ => unimplemented!("{}", typ),
         };
 
-        let bare_with_collector: Result<Arc<dyn ExecutionPlan>> = Ok(Arc::new(CollectorExec::new(
-            bare,
-            group_id,
-            self.optimizer.as_ref().unwrap().runtime_statistics.clone(),
-        ))
-            as Arc<dyn ExecutionPlan>);
-        bare_with_collector.with_context(|| format!("when processing {}", rel_node_dbg))
+        let optimizer = self.optimizer.as_ref().unwrap();
+        if optimizer.adaptive_enabled() {
+            let bare_with_collector: Result<Arc<dyn ExecutionPlan>> =
+                Ok(Arc::new(CollectorExec::new(
+                    bare,
+                    group_id,
+                    self.optimizer.as_ref().unwrap().runtime_statistics.clone(),
+                )) as Arc<dyn ExecutionPlan>);
+            bare_with_collector.with_context(|| format!("when processing {}", rel_node_dbg))
+        } else {
+            Ok(bare)
+        }
     }
 
     pub async fn conv_from_optd(
diff --git a/optd-datafusion-repr/src/lib.rs b/optd-datafusion-repr/src/lib.rs
index 92a71730..fe9ae850 100644
--- a/optd-datafusion-repr/src/lib.rs
+++ b/optd-datafusion-repr/src/lib.rs
@@ -40,6 +40,10 @@ impl DatafusionOptimizer {
         self.enable_adaptive = enable;
     }
 
+    pub fn adaptive_enabled(&self) -> bool {
+        self.enable_adaptive
+    }
+
     pub fn optd_optimizer(&self) -> &CascadesOptimizer<OptRelNodeTyp> {
         &self.optimizer
     }