alamb commented on code in PR #15311:
URL: https://github.com/apache/datafusion/pull/15311#discussion_r2004114810


##########
datafusion/proto/tests/cases/roundtrip_physical_plan.rs:
##########
@@ -1277,6 +1277,15 @@ fn roundtrip_analyze() -> Result<()> {
     )))
 }
 
+#[tokio::test]
+async fn roundtrip_json_source() -> Result<()> {
+    let ctx = SessionContext::new();
+    ctx.register_json("t1", "../core/tests/data/1.json", Default::default())
+        .await?;
+    let plan = ctx.table("t1").await?.create_physical_plan().await?;

Review Comment:
   👍 



##########
datafusion/proto/src/physical_plan/mod.rs:
##########
@@ -247,6 +247,15 @@ impl AsExecutionPlan for protobuf::PhysicalPlanNode {
                 .with_file_compression_type(FileCompressionType::UNCOMPRESSED);
                 Ok(conf.build())
             }
+            PhysicalPlanType::JsonScan(scan) => {

Review Comment:
   It seems like there is one more relevant field for JsonSource, `batch_size`
   
   
   
https://github.com/apache/datafusion/blob/6d5e00ad3f8e53f7252cb1d3c72a6c7f28c1aed6/datafusion/datasource-json/src/source.rs#L251-L257
   
   Perhaps we can add that field to the serialization as well (or file a ticket 
to add it?)
   



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