Create a MaxCompute function

DataWorks allows you to develop functions in Python and Java. This topic describes how to create a MaxCompute function.

1. Go to the DataStudio page.
   1. Log on to the DataWorks console.
   2. In the left-side navigation pane, click Workspaces.
   3. In the top navigation bar, select the region where your workspace resides, find the workspace, and then click Data Analytics in the Actions column.
2. Create a workflow. For more information, see Create a workflow.
3. Create JAR or Python resources, and commit and deploy them. For more information, see Create MaxCompute resources.
4. Create a function.
   1. Find the created workflow, right-click MaxCompute, and then choose Create > Function.
   2. In the Create Function dialog box, set the Function Name and Location parameters.
   3. Click Create.
   4. In the Register Function section, set the parameters.
      

      Parameter	Description
      Function Type	The type of the function. Valid values: Mathematical Function, Aggregate Function, String Function, Date Function, Analytic Function, and Other Functions.
      Engine Instance MaxCompute	By default, the parameter cannot be modified.
      Function Name	The name of the user defined function (UDF). You can reference the function in SQL statements by using the function name. The function name must be globally unique and cannot be changed after the function is created.
      Owner	This parameter is automatically set.
      Class Name	Required. The name of the class that implements the function. Note If the resource type is Python, enter the class name in the Python resource name.Class name format. Do not include the .py extension in the resource name. You can use a Python resource after the resource is committed and deployed. For more information, see Create MaxCompute resources.
      Resources	Required. You can search for existing resources in the current workspace in fuzzy match mode.
      Description	The brief description of the current UDF.
      Expression Syntax	The syntax of the UDF. Example: test.
      Parameter Description	The descriptions of the input and output parameters that are supported.
      Return Value	Optional. The value to return. Example: 1.
      Example	Optional. An example of the function.

5. Click the icon in the toolbar.
6. Commit the function.
   1. Click the icon in the toolbar.
   2. In the Commit Node dialog box, enter your comments in the Change description field.
   3. Click OK.