From dfa3efd8890899616a4cc1d3a8840905459a0a31 Mon Sep 17 00:00:00 2001
From: Johan Lasperas <johan.lasperas@databricks.com>
Date: Thu, 29 Aug 2024 13:33:26 +0200
Subject: [PATCH] Deprecate type changes in Type Widening

---
 protocol_rfcs/type-widening.md | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/protocol_rfcs/type-widening.md b/protocol_rfcs/type-widening.md
index 11a8276e8d3..c204235cc7b 100644
--- a/protocol_rfcs/type-widening.md
+++ b/protocol_rfcs/type-widening.md
@@ -15,13 +15,10 @@ The supported type changes are:
   - `Byte` -> `Short` -> `Int` -> `Long`
 - Floating-point widening:
   - `Float` -> `Double`
-  - `Byte`, `Short` or `Int` -> `Double`
 - Date widening:
   - `Date` -> `Timestamp without timezone`
-- Decimal widening - `p` and `s` denote the decimal precision and scale respectively.
-  - `Decimal(p, s)` -> `Decimal(p + k1, s + k2)` where `k1 >= k2 >= 0`.
-  - `Byte`, `Short` or `Int` -> `Decimal(10 + k1, k2)` where `k1 >= k2 >= 0`.
-  - `Long` -> `Decimal(20 + k1, k2)` where `k1 >= k2 >= 0`.
+- Decimal precision increase:
+  - `Decimal(p1, s)` -> `Decimal(p2, s)` where `p2 >= p1`.
 
 To support this feature:
 - The table must be on Reader version 3 and Writer Version 7.