imay commented on a change in pull request #1140: Add SHOW FUNCTION and update
docs for UDF
URL: https://github.com/apache/incubator-doris/pull/1140#discussion_r283095225
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File path:
docs/documentation/cn/sql-reference/sql-statements/create-function.md
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@@ -0,0 +1,70 @@
+# CREATE FUNCTION
+
+## Syntax
+
+```
+CREATE [AGGREGATE] FUNCTION function_name
+ (arg_type [, ...])
+ RETURNS ret_type
+ [INTERMEDIATE inter_type]
+ [PROPERTIES ("key" = "value" [, ...]) ]
+```
+
+## Description
+
+此语句创建一个自定义函数。执行此命令需要用户拥有 `ADMIN` 权限。
+
+如果 `function_name`
中包含了数据库名字，那么这个自定义函数会创建在对应的数据库中，否则这个函数将会创建在当前会话所在的数据库。新函数的名字与参数不能够与当前命名空间中已存在的函数相同，否则会创建失败。但是只有名字相同，参数不同是能够创建成果的。
Review comment:
OK
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