substrait-io · benbellick · Oct 11, 2025 · Oct 9, 2025 · Oct 9, 2025 · Oct 9, 2025
diff --git a/.gitmodules b/.gitmodules
@@ -1,6 +1,3 @@
 [submodule "third_party/substrait"]
 	path = third_party/substrait
 	url = https://github.com/substrait-io/substrait
-[submodule "third_party/substrait-cpp"]
-	path = third_party/substrait-cpp
-	url = https://github.com/substrait-io/substrait-cpp
diff --git a/src/substrait/json.py b/src/substrait/json.py
diff --git a/tests/sql/test_sql_to_substrait.py b/tests/sql/test_sql_to_substrait.py
@@ -1,6 +1,6 @@
 from substrait.sql.sql_to_substrait import convert
 import pyarrow
-import substrait.json
+from google.protobuf import json_format
 import tempfile
 import pyarrow.substrait as pa_substrait
 import pytest
@@ -91,7 +91,7 @@ def duckdb_schema_resolver(name: str):
         conn.install_extension("substrait", repository="community")
         conn.load_extension("substrait")
 
-        plan_json = substrait.json.dump_json(plan)
+        plan_json = json_format.MessageToJson(plan)
         sql = f"CALL from_substrait_json('{plan_json}')"
 
         substrait_out = conn.sql(sql)

diff --git a/tests/test_json.py b/tests/test_json.py
diff --git a/third_party/substrait-cpp b/third_party/substrait-cpp
diff --git a/update_cpp.sh b/update_cpp.sh