diff --git a/dbms/src/Core/SortDescription.cpp b/dbms/src/Core/SortDescription.cpp
deleted file mode 100644
index 9f0e08f595fb4665d59e80c6f635fa78726735ac..0000000000000000000000000000000000000000
--- a/dbms/src/Core/SortDescription.cpp
+++ /dev/null
@@ -1,20 +0,0 @@
-#include <sstream>
-#include <Core/SortDescription.h>
-#include <Columns/Collator.h>
-#include <IO/Operators.h>
-#include <IO/WriteBufferFromString.h>
-
-
-namespace DB
-{
-
-std::string SortColumnDescription::getID() const
-{
-    WriteBufferFromOwnString out;
-    out << column_name << ", " << column_number << ", " << direction << ", " << nulls_direction;
-    if (collator)
-        out << ", collation locale: " << collator->getLocale();
-    return out.str();
-}
-
-}
diff --git a/dbms/src/Core/SortDescription.h b/dbms/src/Core/SortDescription.h
index 3c757cc8c21eabf7511f1b16fcde9806739b74ce..e93bfe258c51b22c922cc1f76e601dfd1020d59c 100644
--- a/dbms/src/Core/SortDescription.h
+++ b/dbms/src/Core/SortDescription.h
@@ -26,9 +26,6 @@ struct SortColumnDescription
 
     SortColumnDescription(const std::string & column_name_, int direction_, int nulls_direction_, const std::shared_ptr<Collator> & collator_ = nullptr)
         : column_name(column_name_), column_number(0), direction(direction_), nulls_direction(nulls_direction_), collator(collator_) {}
-
-    /// For IBlockInputStream.
-    std::string getID() const;
 };
 
 /// Description of the sorting rule for several columns.