From d0c0b312f5ced4a47f4cd36010677909d985fea9 Mon Sep 17 00:00:00 2001
From: Shubham Koti <shubhamkoti@gmail.com>
Date: Wed, 7 Jan 2026 13:22:07 +0000
Subject: [PATCH 1/4] GH-48740: [C++] Add missing CTypeTraits for decimal types

---
 cpp/src/arrow/type_traits.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/cpp/src/arrow/type_traits.h b/cpp/src/arrow/type_traits.h
index 1b7a02e1085..5a1a6ce012f 100644
--- a/cpp/src/arrow/type_traits.h
+++ b/cpp/src/arrow/type_traits.h
@@ -135,6 +135,21 @@ struct CTypeTraits<bool> : public TypeTraits<BooleanType> {
   using ArrowType = BooleanType;
 };
 
+template <>
+struct CTypeTraits<Decimal128Type> {
+  using ArrowType = Decimal128Type;
+  using CType = Decimal128;
+};
+
+template <>
+struct CTypeTraits<Decimal256Type> {
+  using ArrowType = Decimal256Type;
+  using CType = Decimal256;
+};
+
+
+
+
 #define PRIMITIVE_TYPE_TRAITS_DEF_(CType_, ArrowType_, ArrowArrayType, ArrowBuilderType, \
                                    ArrowScalarType, ArrowTensorType, SingletonFn)        \
   template <>                                                                            \

From 33a4ff36a789e0e270e586ae5ab62fb68a85b5ef Mon Sep 17 00:00:00 2001
From: Shubham Koti <shubhamkoti@gmail.com>
Date: Thu, 8 Jan 2026 11:24:41 +0000
Subject: [PATCH 2/4] Fix linting whitespace

---
 cpp/src/arrow/type_traits.h | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/cpp/src/arrow/type_traits.h b/cpp/src/arrow/type_traits.h
index 5a1a6ce012f..f2a5acf3a2c 100644
--- a/cpp/src/arrow/type_traits.h
+++ b/cpp/src/arrow/type_traits.h
@@ -147,9 +147,6 @@ struct CTypeTraits<Decimal256Type> {
   using CType = Decimal256;
 };
 
-
-
-
 #define PRIMITIVE_TYPE_TRAITS_DEF_(CType_, ArrowType_, ArrowArrayType, ArrowBuilderType, \
                                    ArrowScalarType, ArrowTensorType, SingletonFn)        \
   template <>                                                                            \

From 733d23bb884ee461377b680b4b45c4037ed5583a Mon Sep 17 00:00:00 2001
From: Shubham Koti <shubhamkoti@gmail.com>
Date: Wed, 14 Jan 2026 11:20:44 +0000
Subject: [PATCH 3/4] Add Decimal32 and Decimal64 traits

---
 cpp/src/arrow/type_traits.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/cpp/src/arrow/type_traits.h b/cpp/src/arrow/type_traits.h
index f2a5acf3a2c..1992dd15096 100644
--- a/cpp/src/arrow/type_traits.h
+++ b/cpp/src/arrow/type_traits.h
@@ -147,6 +147,16 @@ struct CTypeTraits<Decimal256Type> {
   using CType = Decimal256;
 };
 
+template <> struct CTypeTraits<Decimal32Type> {
+  using ArrowType = Decimal32Type;
+  using CType = Decimal32;
+};
+
+template <> struct CTypeTraits<Decimal64Type> {
+  using ArrowType = Decimal64Type;
+  using CType = Decimal64;
+};
+
 #define PRIMITIVE_TYPE_TRAITS_DEF_(CType_, ArrowType_, ArrowArrayType, ArrowBuilderType, \
                                    ArrowScalarType, ArrowTensorType, SingletonFn)        \
   template <>                                                                            \

From be168d8dd99b67dbbfa878062c644158efc4f1d4 Mon Sep 17 00:00:00 2001
From: Shubham Koti <shubhamkoti@gmail.com>
Date: Wed, 14 Jan 2026 11:27:29 +0000
Subject: [PATCH 4/4] Fix Doxygen syntax in README

---
 cpp/src/arrow/flight/sql/odbc/README.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/cpp/src/arrow/flight/sql/odbc/README.md b/cpp/src/arrow/flight/sql/odbc/README.md
index 8c2d9705a1d..27621d256d6 100644
--- a/cpp/src/arrow/flight/sql/odbc/README.md
+++ b/cpp/src/arrow/flight/sql/odbc/README.md
@@ -26,9 +26,9 @@ After the build succeeds, the ODBC DLL will be located in
 
 2. Register your ODBC DLL:
 
-   Need to replace `<path\to\repo>` with actual path to repository in the commands.
+   Need to replace `<path\\to\\repo>` with actual path to repository in the commands.
 
-   1. `cd <path\to\repo>`
+   1. `cd <path\\to\\repo>`
    2. Run script to register your ODBC DLL as Apache Arrow Flight SQL ODBC Driver
       ```
       .\cpp\src\arrow\flight\sql\odbc\tests\install_odbc.cmd <path\to\repo>\cpp\build\< release | debug >\< Release | Debug>\arrow_flight_sql_odbc.dll