HappenLee commented on code in PR #30194:
URL: https://github.com/apache/doris/pull/30194#discussion_r1460951823
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docs/zh-CN/docs/sql-manual/sql-functions/ip-functions/is-ipv6-string.md:
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@@ -0,0 +1,80 @@
+---
+{
+"title": "IS_IPV6_STRING",
+"language": "zh-CN"
+}
+---
+
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements. See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership. The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License. You may obtain a copy of the License at
+ http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied. See the License for the
+specific language governing permissions and limitations
+under the License.
+-->
+
+## IS_IPV6_STRING
+
+<version since="dev">
+
+IS_IPV6_STRING
+
+</version>
+
+### description
+
+#### Syntax
+
+`BOOLEAN IS_IPV6_STRING(STRING ipv6_str)`
+
+接收一个表示形式为字符串的IPv6地址作为参数，如果为格式正确且合法的IPv6地址，返回true；反之，返回false。
+
+### notice
+
+`如果入参为NULL，则返回NULL，表示无效收入`
Review Comment:
收入？输入 please check english doc
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