From 20b22df20e83dd028184f7720807a1ee2ded3a3a Mon Sep 17 00:00:00 2001
From: Jove Zhong <jove@timeplus.io>
Date: Sun, 12 Jan 2025 20:34:24 -0800
Subject: [PATCH] Add doc for substring/start_with/end_with

---
 docs/functions_for_text.md | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/docs/functions_for_text.md b/docs/functions_for_text.md
index 0512ac808..52f718205 100644
--- a/docs/functions_for_text.md
+++ b/docs/functions_for_text.md
@@ -28,6 +28,16 @@ For example, `format('{} {}', 'Hello', 'World')`gets `Hello World`
 
 `substr(str,index [,length])` Returns the substring of `str` from `index` (starting from 1). `length` is optional.
 
+### substring
+
+`substring(str,index [,length])` Alias of [substr](#substr).
+
+### start_with
+`start_with(str,prefix)` Determines whether a string starts with a specified prefix.
+
+### end_with
+`end_with(str,suffix)` Determines whether a string ends with a specified suffix.
+
 ### trim
 
 `trim(string)`