âShow Table of Contents
Constants are global variables for a workflow that are defined on the Workflow tab in the Workflow Configuration window. Constants make it possible to change a value in a single location and have that change apply to the rest of the workflow.
There are three types of constants:
Engine: Five Engine constants display in every workflow and an additional constant, IterationNumber, displays when the Workflow Type is Batch, Iterative, or Location Optimizer macro.
Question: When the Workflow Type is Analytic App or Macro, many of the Interface tools display as Question constants. The name of the constant corresponds to the name of the Question tool. See Interface Tools.
User: User constants can be created and edited via the Workflow Configuration window.
Engine and user constants display as variables that can be used to build an expression in any tool that uses an expression editor. The data type for a constant is based on whether the constant is designated as a number or a string on the Workflow tab in the Workflow Configuration window. Question constants do not display in the expression editor. See Expression Editor.
Any constant can be used in the configuration of a tool by using a reference shortcut. You can specify a constant variable by adding a % (percent sign) at the beginning and end of the name : %ConstantType.ConstantName% .
The reference shortcut can then be used in an expression editor or in a text box, and the constant can be updated via a Question tool or modified on the Workflow tab in the Workflow Configuration window.
Be cautious when using this method, as it may not always produce expected results.
Â©2017 Alteryx, Inc., all rights reserved. AllocateÂ®, AlteryxÂ®, GuzzlerÂ®, and SolocastÂ® are registered trademarks of Alteryx, Inc.