From 23dec236c23d23e396b74b129f0d29634bb030e0 Mon Sep 17 00:00:00 2001
From: Lirikl <akd160401@gmail.com>
Date: Fri, 12 May 2023 12:20:52 +0300
Subject: [PATCH] add description

---
 src/Functions/array/arrayFold.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/Functions/array/arrayFold.cpp b/src/Functions/array/arrayFold.cpp
index 7ae764104de..51a1fb50322 100644
--- a/src/Functions/array/arrayFold.cpp
+++ b/src/Functions/array/arrayFold.cpp
@@ -219,7 +219,12 @@ private:
 
 REGISTER_FUNCTION(ArrayFold)
 {
-    factory.registerFunction<ArrayFold>();
+    
+    factory.registerFunction<ArrayFold>(R"(
+        Function arrayFold(x1,...,xn,accum -> expression, array1,...,arrayn, init_accum) applies lambda function to a number of same sized array columns 
+        and collects result in accumulator. Accumulator can be either constant or column.
+        )");
+    
 }