alamb commented on code in PR #10567:
URL: https://github.com/apache/datafusion/pull/10567#discussion_r1607060754
##########
datafusion/optimizer/src/push_down_filter.rs:
##########
@@ -861,16 +861,12 @@ impl OptimizerRule for PushDownFilter {
.collect();
let new_predicate: Vec<Expr> = zip
.filter(|(_, res)| res !=
&TableProviderFilterPushDown::Exact)
- .map(|(pred, _)| (*pred).clone())
+ .map(|(pred, _)| pred.clone())
.collect();
let new_scan = LogicalPlan::TableScan(TableScan {
Review Comment:
👍 this also looks like it might save some copying
##########
datafusion/optimizer/src/push_down_filter.rs:
##########
@@ -802,11 +802,11 @@ impl OptimizerRule for PushDownFilter {
replace_map.insert(expr.display_name()?, expr.clone());
}
let replaced_push_predicates = push_predicates
- .iter()
- .map(|expr| replace_cols_by_name(expr.clone(),
&replace_map))
+ .into_iter()
Review Comment:
this looks like one example of less cloning
##########
datafusion/optimizer/src/push_down_filter.rs:
##########
@@ -829,12 +829,12 @@ impl OptimizerRule for PushDownFilter {
}
LogicalPlan::Join(join) => push_down_join(join,
Some(&filter.predicate)),
LogicalPlan::CrossJoin(cross_join) => {
- let predicates =
split_conjunction_owned(filter.predicate.clone());
+ let predicates = split_conjunction_owned(filter.predicate);
Review Comment:
likewise here we avoid an additional clone
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