From e15b1c6e5f1eda98b9cd932f038be9b042f05e0b Mon Sep 17 00:00:00 2001
From: Nikita Mikhaylov <nikitamikhaylov@clickhouse.com>
Date: Thu, 28 Dec 2023 17:25:27 +0000
Subject: [PATCH] Fixed

---
 src/Processors/Transforms/CheckSortedTransform.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/Processors/Transforms/CheckSortedTransform.cpp b/src/Processors/Transforms/CheckSortedTransform.cpp
index 74579130fdfa..a2ba8e21ba31 100644
--- a/src/Processors/Transforms/CheckSortedTransform.cpp
+++ b/src/Processors/Transforms/CheckSortedTransform.cpp
@@ -52,6 +52,11 @@ void CheckSortedTransform::transform(Chunk & chunk)
         }
     };
 
+    /// ColumnVector tries to cast the rhs column to the same type (ColumnVector) in compareAt method.
+    /// And it doesn't care about the possible incompatibilities in data types
+    /// (for example in case when the right column is ColumnSparse)
+    convertToFullIfSparse(chunk);
+
     const auto & chunk_columns = chunk.getColumns();
 
     ++rows_read;