fix(targets): Handle missing record properties in SQL sinks

singer_sdk/sinks/sql.py

@@ -323,10 +323,20 @@ def bulk_insert_records(
             insert_sql = sqlalchemy.text(insert_sql)
 
         conformed_records = [self.conform_record(record) for record in records]
+        property_names = list(self.conform_schema(schema)["properties"].keys())
+
+        # Create new record dicts with missing properties filled in with None
+        new_records = [
+            {name: record.get(name, None) for name in property_names}
+            for record in conformed_records
+        ]
+
         self.logger.info("Inserting with SQL: %s", insert_sql)
+
         with self.connector._connect() as conn, conn.begin():
-            conn.execute(insert_sql, conformed_records)
-        return len(conformed_records) if isinstance(conformed_records, list) else None
+            result = conn.execute(insert_sql, new_records)
+
+        return result.rowcount
 
     def merge_upsert_from_table(
         self,

tests/samples/test_target_sqlite.py

@@ -396,6 +396,35 @@ def test_sqlite_column_no_morph(sqlite_sample_target: SQLTarget):
     target_sync_test(sqlite_sample_target, input=StringIO(tap_output_b), finalize=True)
 
 
+def test_record_with_missing_properties(
+    sqlite_sample_target: SQLTarget,
+):
+    """Test handling of records with missing properties."""
+    tap_output = "\n".join(
+        json.dumps(msg)
+        for msg in [
+            {
+                "type": "SCHEMA",
+                "stream": "test_stream",
+                "schema": {
+                    "type": "object",
+                    "properties": {
+                        "id": {"type": "integer"},
+                        "name": {"type": "string"},
+                    },
+                },
+                "key_properties": ["id"],
+            },
+            {
+                "type": "RECORD",
+                "stream": "test_stream",
+                "record": {"id": 1},
+            },
+        ]
+    )
+    target_sync_test(sqlite_sample_target, input=StringIO(tap_output), finalize=True)
+
+
 @pytest.mark.parametrize(
     "stream_name,schema,key_properties,expected_dml",
     [