From 9a9154b6310c27a58fe5a79dacd28e477262eda7 Mon Sep 17 00:00:00 2001
From: Harpreet Sangar <happy_san@protonmail.com>
Date: Thu, 13 Apr 2023 14:49:46 +0530
Subject: [PATCH] Fix approximation logic of filter matches in case of `!=`.

---
 src/index.cpp | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/index.cpp b/src/index.cpp
index 44fb93dc..5fd2a0ac 100644
--- a/src/index.cpp
+++ b/src/index.cpp
@@ -2095,9 +2095,8 @@ Option<bool> Index::_approximate_filter_ids(const filter& a_filter,
         }
     }
 
-    if (a_filter.apply_not_equals) {
-        auto all_ids_size = seq_ids->num_ids();
-        filter_ids_length = (all_ids_size - filter_ids_length);
+    if (a_filter.apply_not_equals && filter_ids_length == 0) {
+        filter_ids_length = seq_ids->num_ids();
     }
 
     return Option(true);