fix: make changes in examples

Author: tokoko

examples/adbc_example.py

@@ -45,8 +45,7 @@ def read_adbc_named_table(name: str, conn):
         table = filter(
             table,
             expression=scalar_function(
-                "functions_comparison.yaml",
-                "gte",
+                "functions_comparison.yaml:gte",
                 expressions=[column("ints"), literal(3, i64())],
             ),
         )

examples/builder_example.py

@@ -29,8 +29,7 @@ def basic_example():
     table = filter(
         table,
         expression=scalar_function(
-            "functions_comparison.yaml",
-            "lt",
+            "functions_comparison.yaml:lt",
             expressions=[column("id"), literal(100, i64())],
         ),
     )
@@ -168,8 +167,7 @@ def advanced_example():
     table = filter(
         table,
         expression=scalar_function(
-            "functions_comparison.yaml",
-            "lt",
+            "functions_comparison.yaml:lt",
             expressions=[column("id"), literal(100, i64())],
         ),
     )
@@ -200,8 +198,7 @@ def advanced_example():
     adult_users = filter(
         users,
         expression=scalar_function(
-            "functions_comparison.yaml",
-            "gt",
+            "functions_comparison.yaml:gt",
             expressions=[column("age"), literal(25, i64())],
         ),
     )
@@ -216,8 +213,7 @@ def advanced_example():
             column("salary"),
             # Add a calculated field (this would show function options if available)
             scalar_function(
-                "functions_arithmetic.yaml",
-                "multiply",
+                "functions_arithmetic.yaml:multiply",
                 expressions=[column("salary"), literal(1.1, fp64())],
                 alias="salary_with_bonus",
             ),
@@ -248,8 +244,7 @@ def advanced_example():
     high_value_orders = filter(
         orders,
         expression=scalar_function(
-            "functions_comparison.yaml",
-            "gt",
+            "functions_comparison.yaml:gt",
             expressions=[column("amount"), literal(50.0, fp64())],
         ),
     )
@@ -280,17 +275,14 @@ def expression_only_example():
     print("=== Expression-Only Example ===")
     # Show complex expression structure
     complex_expr = scalar_function(
-        "functions_arithmetic.yaml",
-        "multiply",
+        "functions_arithmetic.yaml:multiply",
         expressions=[
             scalar_function(
-                "functions_arithmetic.yaml",
-                "add",
+                "functions_arithmetic.yaml:add",
                 expressions=[
                     column("base_salary"),
                     scalar_function(
-                        "functions_arithmetic.yaml",
-                        "multiply",
+                        "functions_arithmetic.yaml:multiply",
                         expressions=[
                             column("base_salary"),
                             literal(0.15, fp64()),  # 15% bonus
@@ -299,8 +291,7 @@ def expression_only_example():
                 ],
             ),
             scalar_function(
-                "functions_arithmetic.yaml",
-                "subtract",
+                "functions_arithmetic.yaml:subtract",
                 expressions=[
                     literal(1.0, fp64()),
                     literal(0.25, fp64()),  # 25% tax rate

examples/duckdb_example.py

@@ -42,8 +42,7 @@ def read_duckdb_named_table(name: str, conn):
 table = filter(
     table,
     expression=scalar_function(
-        "functions_comparison.yaml",
-        "equal",
+        "functions_comparison.yaml:equal",
         expressions=[column("c_nationkey"), literal(3, i32())],
     ),
 )

src/substrait/utils/display.py

@@ -722,7 +722,7 @@ def _stream_literal_value(
             )
         elif literal.HasField("string"):
             stream.write(
-                f"{indent}{self._color('string', Colors.BLUE)}: {self._color(f'"{literal.string}"', Colors.GREEN)}\n"
+                f"{indent}{self._color('string', Colors.BLUE)}: {self._color(literal.string, Colors.GREEN)}\n"
             )
         elif literal.HasField("date"):
             stream.write(
@@ -783,7 +783,7 @@ def _stream_struct_literal(
                     )
                 elif field.HasField("string"):
                     stream.write(
-                        f"{self._get_indent_with_arrow(depth + 2)}{self._color('string', Colors.BLUE)}: {self._color(f'"{field.string}"', Colors.GREEN)}\n"
+                        f"{self._get_indent_with_arrow(depth + 2)}{self._color('string', Colors.BLUE)}: {self._color(field.string, Colors.GREEN)}\n"
                     )
                 elif field.HasField("boolean"):
                     stream.write(