From c6fd584ac01ef773483c6572b27e4f939e4be558 Mon Sep 17 00:00:00 2001
From: yangjie01 <yangjie01@baidu.com>
Date: Tue, 16 Jun 2026 10:28:19 +0800
Subject: [PATCH] docs: mark schema evolution complete in roadmap

All three schema-evolution operations have landed: lance_dataset_add_columns_*
(#45), lance_dataset_drop_columns (#42), and lance_dataset_alter_columns (#44).
Tick the Phase 3 row and spell out the functions that cover it.
---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 79edb15..e5dd82a 100644
--- a/README.md
+++ b/README.md
@@ -47,7 +47,7 @@ Based on the [liblance RFC](https://github.com/lance-format/lance/discussions/60
 | [ ] | Delete operations | Predicate-based deletion |
 | [ ] | Update operations | Expression-based row updates |
 | [ ] | Merge-insert | Upsert functionality with builder pattern |
-| [ ] | Schema evolution | Add/drop/alter columns with expressions |
+| [x] | Schema evolution | Add columns via SQL / all-null / `ArrowArrayStream` with `lance_dataset_add_columns_*()`, drop via `lance_dataset_drop_columns()`, rename / retype / set nullability via `lance_dataset_alter_columns()` |
 | [x] | Version management | List via `lance_dataset_versions()`, rollback via `lance_dataset_restore()`, checkout via `lance_dataset_open(uri, opts, version)` |
 
 ### Phase 4: Advanced Features