From 58f5b9c01895da0490b8281c36fe37cafdb1f15f Mon Sep 17 00:00:00 2001
From: Pere Diaz Bou <pere-altea@hotmail.com>
Date: Wed, 5 Nov 2025 13:05:51 +0100
Subject: [PATCH] core/mvcc: is_btree_allocated fix

---
 core/mvcc/cursor.rs       | 4 ++--
 core/mvcc/database/mod.rs | 4 ----
 2 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/core/mvcc/cursor.rs b/core/mvcc/cursor.rs
index e024d454f..124b0ca49 100644
--- a/core/mvcc/cursor.rs
+++ b/core/mvcc/cursor.rs
@@ -220,9 +220,9 @@ impl<Clock: LogicalClock + 'static> MvccLazyCursor<Clock> {
         new_position
     }
 
-    /// If page id is negative, it means the btree is not allocated.
     fn is_btree_allocated(&self) -> bool {
-        self.table_id.is_btree_allocated()
+        let maybe_root_page = self.db.table_id_to_rootpage.get(&self.table_id);
+        maybe_root_page.is_some_and(|entry| entry.value().is_some())
     }
 }
 
diff --git a/core/mvcc/database/mod.rs b/core/mvcc/database/mod.rs
index c249811b0..0057e56d8 100644
--- a/core/mvcc/database/mod.rs
+++ b/core/mvcc/database/mod.rs
@@ -63,10 +63,6 @@ impl MVTableId {
         assert!(value < 0, "MVCC table IDs are always negative");
         Self(value)
     }
-
-    pub fn is_btree_allocated(&self) -> bool {
-        self.0 >= 0
-    }
 }
 
 impl From<i64> for MVTableId {