From f49575d547a0e7010b136fecddabdc737bfa0770 Mon Sep 17 00:00:00 2001
From: rajajisai <sairajaji1999@gmail.com>
Date: Tue, 5 Aug 2025 21:17:25 -0700
Subject: [PATCH] Return error when trying to drop an index associated with
 UNIQUE or PRIMARY KEY constraints

---
 core/translate/index.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/core/translate/index.rs b/core/translate/index.rs
index 3041e431f..a82cccf68 100644
--- a/core/translate/index.rs
+++ b/core/translate/index.rs
@@ -343,6 +343,15 @@ pub fn translate_drop_index(
             )));
         }
     }
+    // Return an error if the index is an unique or primary key.
+    if let Some(idx) = maybe_index {
+        if idx.unique {
+            return Err(crate::error::LimboError::InvalidArgument(
+                "index associated with UNIQUE or PRIMARY KEY constraint cannot be dropped"
+                    .to_string(),
+            ));
+        }
+    }
 
     // According to sqlite should emit Null instruction
     // but why?