make MemoExt a member field of the cost model

Author: xx01cyx

optd-cost-model/src/cost_model.rs

@@ -12,6 +12,7 @@ use crate::{
         nodes::{ArcPredicateNode, PhysicalNodeType},
         types::{AttrId, EpochId, ExprId, TableId},
     },
+    memo_ext::MemoExt,
     storage::CostModelStorageManager,
     ComputeCostContext, Cost, CostModel, CostModelResult, EstimatedStatistic, StatValue,
 };
@@ -20,22 +21,25 @@ use crate::{
 pub struct CostModelImpl<S: CostModelStorageLayer> {
     storage_manager: CostModelStorageManager<S>,
     default_catalog_source: CatalogSource,
+    _memo: Arc<dyn MemoExt>,
 }
 
 impl<S: CostModelStorageLayer> CostModelImpl<S> {
     /// TODO: documentation
     pub fn new(
         storage_manager: CostModelStorageManager<S>,
         default_catalog_source: CatalogSource,
+        memo: Arc<dyn MemoExt>,
     ) -> Self {
         Self {
             storage_manager,
             default_catalog_source,
+            _memo: memo,
         }
     }
 }
 
-impl<S: CostModelStorageLayer + std::marker::Sync + 'static> CostModel for CostModelImpl<S> {
+impl<S: CostModelStorageLayer + Sync + 'static> CostModel for CostModelImpl<S> {
     fn compute_operation_cost(
         &self,
         node: &PhysicalNodeType,

optd-cost-model/src/memo_ext.rs

@@ -3,7 +3,7 @@ use crate::common::{
     types::GroupId,
 };
 
-pub trait MemoExt {
+pub trait MemoExt: Send + Sync + 'static {
     fn get_schema(&self, group_id: GroupId) -> Schema;
     fn get_column_ref(&self, group_id: GroupId) -> GroupAttrRefs;
     fn get_attribute_info(&self, group_id: GroupId, attr_ref_idx: u64) -> Attribute;