.alter function docstring command

Applies to: ✅ Microsoft FabricAzure Data Explorer

Alters the DocString value of an existing function.

DocString is free text that you can attach to a table/function/column describing the entity. This string is presented in various UX settings next to the entity names.

Note

If the function doesn't exist, an error is returned. For more information on how to create a new function, see .create function.

Permissions

You must have at least Function Admin permissions to run this command. The principal that creates the function is automatically made a Function Admin.

Syntax

.alter function FunctionName docstring Documentation

Learn more about syntax conventions.

Parameters

Name Type Required Description
FunctionName string ✔️ The name of the function to alter.
Documentation string ✔️ The new docstring value for the function.

Returns

Output parameter Type Description
Name string The name of the function
Parameters string The parameters required by the function
Body string (Zero or more) let statements followed by a valid CSL expression that is evaluated when the function is invoked
Folder string A folder used for UI functions categorization. This parameter doesn't change the way the function is invoked
DocString string A description of the function for UI purposes

Example

The following example updates the description (docstring) of the MyFunction1 function.

.alter function MyFunction1 docstring "Updated docstring"

Output

Name Parameters Body Folder DocString
MyFunction2 (myLimit: long) {StormEvents | take myLimit} MyFolder Updated docstring