diff --git a/src/datatypes/src/vectors/json/array.rs b/src/datatypes/src/vectors/json/array.rs
index ee60c47d3f..862abf9658 100644
--- a/src/datatypes/src/vectors/json/array.rs
+++ b/src/datatypes/src/vectors/json/array.rs
@@ -77,6 +77,8 @@ impl JsonArray<'_> {
                                 JsonArray::from(&array_columns[j]).try_align(expect_type)?
                             }
                             (DataType::List(expect_item), DataType::List(array_item)) => {
+                                common_telemetry::info!("1. expect_item: {}", expect_item.data_type());
+                                common_telemetry::info!("2. array_item: {}", array_item.data_type());
                                 let list_array = array_columns[j].as_list::<i32>();
                                 let item_aligned =
                                     match (expect_item.data_type(), array_item.data_type()) {
diff --git a/src/mito2/src/memtable.rs b/src/mito2/src/memtable.rs
index 68f16fe204..efc14541b5 100644
--- a/src/mito2/src/memtable.rs
+++ b/src/mito2/src/memtable.rs
@@ -273,8 +273,10 @@ pub(crate) fn merge_json_extension_fields(base: &SchemaRef, others: &[SchemaRef]
         if let Some(merged) = merged
             && field.data_type() != merged.as_ref()
         {
+            common_telemetry::info!("before merged: {}", field.data_type());
             let merged =
                 json_type::merge_as_json_type(field.data_type(), merged.as_ref()).into_owned();
+            common_telemetry::info!("after merged: {}", merged);
 
             let mut new = field.as_ref().clone();
             new.set_data_type(merged);