From 8f00163078f3af245d84c3818a50d46f4e4c27c1 Mon Sep 17 00:00:00 2001
From: slzhou <shenglian_zhou@163.com>
Date: Thu, 8 Sep 2022 10:25:02 +0800
Subject: [PATCH] fix: filter unit is not removed when values and nulls are in
 the same block

---
 src/query/src/qFilter.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/query/src/qFilter.c b/src/query/src/qFilter.c
index 0d9fdb814a..3387956730 100644
--- a/src/query/src/qFilter.c
+++ b/src/query/src/qFilter.c
@@ -2787,6 +2787,10 @@ int32_t filterRmUnitByRange(SFilterInfo *info, SDataStatis *pDataStatis, int32_t
         info->blkUnitRes[k] = -1;
         rmUnit = 1;
         continue;
+      } else {
+        // when there are values and nulls in this block, no unit can produce all true
+        // or all false. so no unit can be removed
+        continue;
       }
     }
 
-- 
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