From 6c0c4d77d066cd41e22f0808f50871b1fbf27dd3 Mon Sep 17 00:00:00 2001
From: Jussi Saurio <jussi.saurio@gmail.com>
Date: Thu, 21 Aug 2025 14:58:12 +0300
Subject: [PATCH] Fix UPDATE inserting NULL into index instead of rowid

---
 core/translate/emitter.rs | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/core/translate/emitter.rs b/core/translate/emitter.rs
index e2498f121..7f8284e26 100644
--- a/core/translate/emitter.rs
+++ b/core/translate/emitter.rs
@@ -1000,10 +1000,17 @@ fn emit_update_insns(
 
         // copy each index column from the table's column registers into these scratch regs
         for (i, col) in index.columns.iter().enumerate() {
+            let col_in_table = table_ref
+                .columns()
+                .get(col.pos_in_table)
+                .expect("column index out of bounds");
             // copy from the table's column register over to the index's scratch register
-
             program.emit_insn(Insn::Copy {
-                src_reg: idx_cols_start_reg + col.pos_in_table,
+                src_reg: if col_in_table.is_rowid_alias {
+                    rowid_reg
+                } else {
+                    idx_cols_start_reg + col.pos_in_table
+                },
                 dst_reg: idx_start_reg + i,
                 extra_amount: 0,
             });