adriangb commented on code in PR #18192:
URL: https://github.com/apache/datafusion/pull/18192#discussion_r2448731465
##########
datafusion/proto/src/physical_plan/from_proto.rs:
##########
@@ -207,10 +212,19 @@ where
/// * `codec` - An extension codec used to decode custom UDFs.
pub fn parse_physical_expr(
proto: &protobuf::PhysicalExprNode,
- ctx: &TaskContext,
+ decode_ctx: &DecodeContext,
input_schema: &Schema,
codec: &dyn PhysicalExtensionCodec,
) -> Result<Arc<dyn PhysicalExpr>> {
+ // Check cache first if an ID is present
+ if let Some(id) = proto.id {
+ if let Some(cached) = decode_ctx.get_cached_expr(id) {
+ return Ok(cached);
+ }
+ }
+
Review Comment:
Ah I see your point now. So we still need some way to get a reference to all
`Arc<dyn PhysicalExpr>` outside of serialization 🤔
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