diff --git a/src/Functions/FunctionCustomWeekToSomething.h b/src/Functions/FunctionCustomWeekToSomething.h
index 0fb91532c58..542062151ce 100644
--- a/src/Functions/FunctionCustomWeekToSomething.h
+++ b/src/Functions/FunctionCustomWeekToSomething.h
@@ -130,20 +130,17 @@ public:
 
     Monotonicity getMonotonicityForRange(const IDataType & type, const Field & left, const Field & right) const override
     {
-        IFunction::Monotonicity is_monotonic{true};
-        IFunction::Monotonicity is_not_monotonic;
+        if constexpr (std::is_same_v<typename Transform::FactorTransform, ZeroTransform>)
+            return { .is_monotonic = true, .is_always_monotonic = true };
 
-        if (std::is_same_v<typename Transform::FactorTransform, ZeroTransform>)
-        {
-            is_monotonic.is_always_monotonic = true;
-            return is_monotonic;
-        }
+        const IFunction::Monotonicity is_monotonic = { .is_monotonic = true };
+        const IFunction::Monotonicity is_not_monotonic;
 
         /// This method is called only if the function has one argument. Therefore, we do not care about the non-local time zone.
         const DateLUTImpl & date_lut = DateLUT::instance();
 
         if (left.isNull() || right.isNull())
-            return is_not_monotonic;
+            return {};
 
         /// The function is monotonous on the [left, right] segment, if the factor transformation returns the same values for them.
 
diff --git a/src/Functions/FunctionDateOrDateTimeToSomething.h b/src/Functions/FunctionDateOrDateTimeToSomething.h
index 5f23947ce7d..00678e65364 100644
--- a/src/Functions/FunctionDateOrDateTimeToSomething.h
+++ b/src/Functions/FunctionDateOrDateTimeToSomething.h
@@ -128,14 +128,11 @@ public:
 
     Monotonicity getMonotonicityForRange(const IDataType & type, const Field & left, const Field & right) const override
     {
-        IFunction::Monotonicity is_monotonic { true };
-        IFunction::Monotonicity is_not_monotonic;
+        if constexpr (std::is_same_v<typename Transform::FactorTransform, ZeroTransform>)
+            return { .is_monotonic = true, .is_always_monotonic = true };
 
-        if (std::is_same_v<typename Transform::FactorTransform, ZeroTransform>)
-        {
-            is_monotonic.is_always_monotonic = true;
-            return is_monotonic;
-        }
+        const IFunction::Monotonicity is_monotonic = { .is_monotonic = true };
+        const IFunction::Monotonicity is_not_monotonic;
 
         /// This method is called only if the function has one argument. Therefore, we do not care about the non-local time zone.
         const DateLUTImpl & date_lut = DateLUT::instance();
diff --git a/src/Functions/FunctionUnaryArithmetic.h b/src/Functions/FunctionUnaryArithmetic.h
index 31227b5b126..a6cb63639ae 100644
--- a/src/Functions/FunctionUnaryArithmetic.h
+++ b/src/Functions/FunctionUnaryArithmetic.h
@@ -290,7 +290,7 @@ struct PositiveMonotonicity
     static bool has() { return true; }
     static IFunction::Monotonicity get(const Field &, const Field &)
     {
-        return { true };
+        return { .is_monotonic = true };
     }
 };
 
diff --git a/src/Functions/FunctionsConversion.h b/src/Functions/FunctionsConversion.h
index 6ba2c7e02a5..3c4c28e2af0 100644
--- a/src/Functions/FunctionsConversion.h
+++ b/src/Functions/FunctionsConversion.h
@@ -1954,7 +1954,7 @@ struct PositiveMonotonicity
     static bool has() { return true; }
     static IFunction::Monotonicity get(const IDataType &, const Field &, const Field &)
     {
-        return { true };
+        return { .is_monotonic = true };
     }
 };
 
@@ -1963,7 +1963,7 @@ struct UnknownMonotonicity
     static bool has() { return false; }
     static IFunction::Monotonicity get(const IDataType &, const Field &, const Field &)
     {
-        return { false };
+        return { };
     }
 };
 
@@ -1989,13 +1989,13 @@ struct ToNumberMonotonicity
         /// (Enum has separate case, because it is different data type)
         if (checkAndGetDataType<DataTypeNumber<T>>(&type) ||
             checkAndGetDataType<DataTypeEnum<T>>(&type))
-            return { true, true, true };
+            return { .is_monotonic = true, .is_always_monotonic = true };
 
         /// Float cases.
 
         /// When converting to Float, the conversion is always monotonic.
-        if (std::is_floating_point_v<T>)
-            return {true, true, true};
+        if constexpr (std::is_floating_point_v<T>)
+            return { .is_monotonic = true, .is_always_monotonic = true };
 
         /// If converting from Float, for monotonicity, arguments must fit in range of result type.
         if (WhichDataType(type).isFloat())
@@ -2010,7 +2010,7 @@ struct ToNumberMonotonicity
                 && left_float <= static_cast<Float64>(std::numeric_limits<T>::max())
                 && right_float >= static_cast<Float64>(std::numeric_limits<T>::min())
                 && right_float <= static_cast<Float64>(std::numeric_limits<T>::max()))
-                return { true };
+                return { .is_monotonic = true };
 
             return {};
         }
@@ -2035,10 +2035,10 @@ struct ToNumberMonotonicity
         if (size_of_from == size_of_to)
         {
             if (from_is_unsigned == to_is_unsigned)
-                return {true, true, true};
+                return { .is_monotonic = true, .is_always_monotonic = true };
 
             if (left_in_first_half == right_in_first_half)
-                return {true};
+                return { .is_monotonic = true };
 
             return {};
         }
@@ -2047,14 +2047,14 @@ struct ToNumberMonotonicity
         if (size_of_from < size_of_to)
         {
             if (from_is_unsigned == to_is_unsigned)
-                return {true, true, true};
+                return { .is_monotonic = true, .is_always_monotonic = true };
 
             if (!to_is_unsigned)
-                return {true, true, true};
+                return { .is_monotonic = true, .is_always_monotonic = true };
 
             /// signed -> unsigned. If arguments from the same half, then function is monotonic.
             if (left_in_first_half == right_in_first_half)
-                return {true};
+                return { .is_monotonic = true };
 
             return {};
         }
@@ -2071,10 +2071,14 @@ struct ToNumberMonotonicity
                 return {};
 
             if (to_is_unsigned)
-                return {true};
+                return { .is_monotonic = true };
             else
+            {
                 // If To is signed, it's possible that the signedness is different after conversion. So we check it explicitly.
-                return {(T(left.get<UInt64>()) >= 0) == (T(right.get<UInt64>()) >= 0)};
+                const bool is_monotonic = (T(left.get<UInt64>()) >= 0) == (T(right.get<UInt64>()) >= 0);
+
+                return { .is_monotonic = is_monotonic };
+            }
         }
 
         __builtin_unreachable();
@@ -2089,7 +2093,7 @@ struct ToDateMonotonicity
     {
         auto which = WhichDataType(type);
         if (which.isDateOrDate32() || which.isDateTime() || which.isDateTime64() || which.isInt8() || which.isInt16() || which.isUInt8() || which.isUInt16())
-            return {true, true, true};
+            return { .is_monotonic = true, .is_always_monotonic = true };
         else if (
             (which.isUInt() && ((left.isNull() || left.get<UInt64>() < 0xFFFF) && (right.isNull() || right.get<UInt64>() >= 0xFFFF)))
             || (which.isInt() && ((left.isNull() || left.get<Int64>() < 0xFFFF) && (right.isNull() || right.get<Int64>() >= 0xFFFF)))
@@ -2097,7 +2101,7 @@ struct ToDateMonotonicity
             || !type.isValueRepresentedByNumber())
             return {};
         else
-            return {true, true, true};
+            return { .is_monotonic = true, .is_always_monotonic = true };
     }
 };
 
@@ -2108,7 +2112,7 @@ struct ToDateTimeMonotonicity
     static IFunction::Monotonicity get(const IDataType & type, const Field &, const Field &)
     {
         if (type.isValueRepresentedByNumber())
-            return {true, true, true};
+            return { .is_monotonic = true, .is_always_monotonic = true };
         else
             return {};
     }
@@ -2123,7 +2127,7 @@ struct ToStringMonotonicity
 
     static IFunction::Monotonicity get(const IDataType & type, const Field & left, const Field & right)
     {
-        IFunction::Monotonicity positive(true, true);
+        IFunction::Monotonicity positive{ .is_monotonic = true };
         IFunction::Monotonicity not_monotonic;
 
         const auto * type_ptr = &type;
diff --git a/src/Functions/FunctionsRound.h b/src/Functions/FunctionsRound.h
index 3474790b8b3..0f5fc020934 100644
--- a/src/Functions/FunctionsRound.h
+++ b/src/Functions/FunctionsRound.h
@@ -614,7 +614,7 @@ public:
 
     Monotonicity getMonotonicityForRange(const IDataType &, const Field &, const Field &) const override
     {
-        return { true, true, true };
+        return { .is_monotonic = true, .is_always_monotonic = true };
     }
 };
 
diff --git a/src/Functions/IFunction.h b/src/Functions/IFunction.h
index db8a449f2b1..05104b1f896 100644
--- a/src/Functions/IFunction.h
+++ b/src/Functions/IFunction.h
@@ -250,12 +250,9 @@ public:
     /// The property of monotonicity for a certain range.
     struct Monotonicity
     {
-        bool is_monotonic = false;    /// Is the function monotonous (nondecreasing or nonincreasing).
-        bool is_positive = true;    /// true if the function is nondecreasing, false, if notincreasing. If is_monotonic = false, then it does not matter.
+        bool is_monotonic = false;    /// Is the function monotonous (non-decreasing or non-increasing).
+        bool is_positive = true;    /// true if the function is non-decreasing, false if non-increasing. If is_monotonic = false, then it does not matter.
         bool is_always_monotonic = false; /// Is true if function is monotonic on the whole input range I
-
-        Monotonicity(bool is_monotonic_ = false, bool is_positive_ = true, bool is_always_monotonic_ = false)
-                : is_monotonic(is_monotonic_), is_positive(is_positive_), is_always_monotonic(is_always_monotonic_) {}
     };
 
     /** Get information about monotonicity on a range of values. Call only if hasInformationAboutMonotonicity.
diff --git a/src/Functions/abs.cpp b/src/Functions/abs.cpp
index 21d92e25d75..f8c68c0ded2 100644
--- a/src/Functions/abs.cpp
+++ b/src/Functions/abs.cpp
@@ -46,7 +46,7 @@ template <> struct FunctionUnaryArithmeticMonotonicity<NameAbs>
         if ((left_float < 0 && right_float > 0) || (left_float > 0 && right_float < 0))
             return {};
 
-        return { true, (left_float > 0) };
+        return { .is_monotonic = true, .is_positive = left_float > 0 };
     }
 };
 
diff --git a/src/Functions/date_trunc.cpp b/src/Functions/date_trunc.cpp
index 2455bf41fa7..da6a4839ca0 100644
--- a/src/Functions/date_trunc.cpp
+++ b/src/Functions/date_trunc.cpp
@@ -143,7 +143,7 @@ public:
 
     Monotonicity getMonotonicityForRange(const IDataType &, const Field &, const Field &) const override
     {
-        return { true, true, true };
+        return { .is_monotonic = true, .is_always_monotonic = true };
     }
 
 private:
diff --git a/src/Functions/fromModifiedJulianDay.cpp b/src/Functions/fromModifiedJulianDay.cpp
index 913cdbfb21c..e699547e346 100644
--- a/src/Functions/fromModifiedJulianDay.cpp
+++ b/src/Functions/fromModifiedJulianDay.cpp
@@ -139,10 +139,7 @@ namespace DB
 
         Monotonicity getMonotonicityForRange(const IDataType &, const Field &, const Field &) const override
         {
-            return Monotonicity(
-                true,  // is_monotonic
-                true,  // is_positive
-                true); // is_always_monotonic
+            return { .is_monotonic = true, .is_always_monotonic = true };
         }
 
     private:
diff --git a/src/Functions/intExp10.cpp b/src/Functions/intExp10.cpp
index 9eca25fd79b..abaa17c862b 100644
--- a/src/Functions/intExp10.cpp
+++ b/src/Functions/intExp10.cpp
@@ -55,7 +55,7 @@ template <> struct FunctionUnaryArithmeticMonotonicity<NameIntExp10>
         if (left_float < 0 || right_float > 19)
             return {};
 
-        return { true };
+        return { .is_monotonic = true };
     }
 };
 
diff --git a/src/Functions/intExp2.cpp b/src/Functions/intExp2.cpp
index 59b829bbad8..b2c7e80ae4b 100644
--- a/src/Functions/intExp2.cpp
+++ b/src/Functions/intExp2.cpp
@@ -58,7 +58,7 @@ template <> struct FunctionUnaryArithmeticMonotonicity<NameIntExp2>
         if (left_float < 0 || right_float > 63)
             return {};
 
-        return { true };
+        return { .is_monotonic = true };
     }
 };
 
diff --git a/src/Functions/negate.cpp b/src/Functions/negate.cpp
index 17a9cbfe055..a378589fe30 100644
--- a/src/Functions/negate.cpp
+++ b/src/Functions/negate.cpp
@@ -42,7 +42,7 @@ template <> struct FunctionUnaryArithmeticMonotonicity<NameNegate>
     static bool has() { return true; }
     static IFunction::Monotonicity get(const Field &, const Field &)
     {
-        return { true, false };
+        return { .is_monotonic = true, .is_positive = false };
     }
 };
 
diff --git a/src/Functions/sign.cpp b/src/Functions/sign.cpp
index 67c56ba0206..5dfe6538b32 100644
--- a/src/Functions/sign.cpp
+++ b/src/Functions/sign.cpp
@@ -37,7 +37,10 @@ template <>
 struct FunctionUnaryArithmeticMonotonicity<NameSign>
 {
     static bool has() { return true; }
-    static IFunction::Monotonicity get(const Field &, const Field &) { return {true, true, false}; }
+    static IFunction::Monotonicity get(const Field &, const Field &)
+    {
+        return { .is_monotonic = true };
+    }
 };
 
 void registerFunctionSign(FunctionFactory & factory)
diff --git a/src/Functions/toModifiedJulianDay.cpp b/src/Functions/toModifiedJulianDay.cpp
index ead2ca826d1..7873baa11af 100644
--- a/src/Functions/toModifiedJulianDay.cpp
+++ b/src/Functions/toModifiedJulianDay.cpp
@@ -157,10 +157,7 @@ namespace DB
 
         Monotonicity getMonotonicityForRange(const IDataType &, const Field &, const Field &) const override
         {
-            return Monotonicity(
-                true,  // is_monotonic
-                true,  // is_positive
-                true); // is_always_monotonic
+            return { .is_monotonic = true, .is_always_monotonic = true };
         }
 
     private:
diff --git a/src/Functions/toStartOfInterval.cpp b/src/Functions/toStartOfInterval.cpp
index 2ad7585fad3..fe7b1188a47 100644
--- a/src/Functions/toStartOfInterval.cpp
+++ b/src/Functions/toStartOfInterval.cpp
@@ -311,7 +311,7 @@ public:
 
     Monotonicity getMonotonicityForRange(const IDataType &, const Field &, const Field &) const override
     {
-        return { true, true, true };
+        return { .is_monotonic = true, .is_always_monotonic = true };
     }
 
 private:
diff --git a/src/Functions/toTimezone.cpp b/src/Functions/toTimezone.cpp
index 8205a62614e..092b79131d8 100644
--- a/src/Functions/toTimezone.cpp
+++ b/src/Functions/toTimezone.cpp
@@ -66,7 +66,8 @@ public:
 
     Monotonicity getMonotonicityForRange(const IDataType & /*type*/, const Field & /*left*/, const Field & /*right*/) const override
     {
-        return {is_constant_timezone, is_constant_timezone, is_constant_timezone};
+        const bool b = is_constant_timezone;
+        return { .is_monotonic = b, .is_positive = b, .is_always_monotonic = b };
     }
 
 private:
diff --git a/src/Interpreters/ExpressionJIT.cpp b/src/Interpreters/ExpressionJIT.cpp
index 9005b24b044..9203c2182d8 100644
--- a/src/Interpreters/ExpressionJIT.cpp
+++ b/src/Interpreters/ExpressionJIT.cpp
@@ -239,7 +239,9 @@ public:
         const IDataType * type_ptr = &type;
         Field left_mut = left;
         Field right_mut = right;
-        Monotonicity result(true, true, true);
+
+        Monotonicity result = { .is_monotonic = true, .is_positive = true, .is_always_monotonic = true };
+
         /// monotonicity is only defined for unary functions, so the chain must describe a sequence of nested calls
         for (size_t i = 0; i < nested_functions.size(); ++i)
         {
diff --git a/src/Interpreters/MonotonicityCheckVisitor.h b/src/Interpreters/MonotonicityCheckVisitor.h
index 350318047c7..a25fbf26420 100644
--- a/src/Interpreters/MonotonicityCheckVisitor.h
+++ b/src/Interpreters/MonotonicityCheckVisitor.h
@@ -28,7 +28,9 @@ public:
         const TablesWithColumns & tables;
         ContextPtr context;
         const std::unordered_set<String> & group_by_function_hashes;
-        Monotonicity monotonicity{true, true, true};
+
+        Monotonicity monotonicity = { .is_monotonic = true, .is_positive = true, .is_always_monotonic = true };
+
         ASTIdentifier * identifier = nullptr;
         DataTypePtr arg_data_type = {};