From b3be21f472421e581f589ed659f8ddef4ceb365a Mon Sep 17 00:00:00 2001
From: Jussi Saurio <jussi.saurio@gmail.com>
Date: Tue, 14 Oct 2025 16:15:20 +0300
Subject: [PATCH] Do not count ephemeral table INSERTs as changes

---
 core/translate/result_row.rs | 4 +++-
 core/vdbe/execute.rs         | 5 ++++-
 core/vdbe/insn.rs            | 6 ++++++
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/core/translate/result_row.rs b/core/translate/result_row.rs
index c087a0abf..2ec60e641 100644
--- a/core/translate/result_row.rs
+++ b/core/translate/result_row.rs
@@ -133,7 +133,9 @@ pub fn emit_result_row_and_limit(
                 key_reg: result_columns_start_reg + (plan.result_columns.len() - 1), // Rowid reg is the last register
                 record_reg,
                 // since we are not doing an Insn::NewRowid or an Insn::NotExists here, we need to seek to ensure the insertion happens in the correct place.
-                flag: InsertFlags::new().require_seek(),
+                flag: InsertFlags::new()
+                    .require_seek()
+                    .is_ephemeral_table_insert(),
                 table_name: table.name.clone(),
             });
         }
diff --git a/core/vdbe/execute.rs b/core/vdbe/execute.rs
index 82b850ec1..2c4e159d7 100644
--- a/core/vdbe/execute.rs
+++ b/core/vdbe/execute.rs
@@ -5892,7 +5892,10 @@ pub fn op_insert(
                     let cursor = cursor.as_btree_mut();
                     cursor.root_page()
                 };
-                if root_page != 1 && table_name != "sqlite_sequence" {
+                if root_page != 1
+                    && table_name != "sqlite_sequence"
+                    && !flag.has(InsertFlags::EPHEMERAL_TABLE_INSERT)
+                {
                     state.op_insert_state.sub_state = OpInsertSubState::UpdateLastRowid;
                 } else {
                     let schema = program.connection.schema.read();
diff --git a/core/vdbe/insn.rs b/core/vdbe/insn.rs
index a774edad5..bf7bf89b3 100644
--- a/core/vdbe/insn.rs
+++ b/core/vdbe/insn.rs
@@ -112,6 +112,7 @@ pub struct InsertFlags(pub u8);
 impl InsertFlags {
     pub const UPDATE_ROWID_CHANGE: u8 = 0x01; // Flag indicating this is part of an UPDATE statement where the row's rowid is changed
     pub const REQUIRE_SEEK: u8 = 0x02; // Flag indicating that a seek is required to insert the row
+    pub const EPHEMERAL_TABLE_INSERT: u8 = 0x04; // Flag indicating that this is an insert into an ephemeral table
 
     pub fn new() -> Self {
         InsertFlags(0)
@@ -130,6 +131,11 @@ impl InsertFlags {
         self.0 |= InsertFlags::UPDATE_ROWID_CHANGE;
         self
     }
+
+    pub fn is_ephemeral_table_insert(mut self) -> Self {
+        self.0 |= InsertFlags::EPHEMERAL_TABLE_INSERT;
+        self
+    }
 }
 
 #[derive(Clone, Copy, Debug)]