Metadata Instruction: Add new variable to the Analytics Tree.
Edited by : Chandan Kar
Use Cases - When to use this command
When require to store any type of data. (i.e. int , string , float)
When require to store any type result of an expression. (i.e. int , string , float)
Description
ADDCOLS command is used to declare variable inside the root node. After declared, we can use that variable or columns to store data or result of any expression through out the tree without any error.
Guidelines for Usage:
DO NOT USE in any other nodes as an instruction except for the root node.
If we require any variable in the analytics tree, first we need to declared it inside the root node using ADDCOLS.
Variable name must start with "$" sign followed by the name. (i.e "$lane")
Variable name is case sensitive. (i.e "$lane" & "$Lane" both are different)
Variable name cannot have spaces or commas.
Default value of variable is null.
How to use this command
ADDCOLS command is only use inside the root node as an instruction. It can not be used in any other nodes as an instruction. It should not be used on the Arrows.
Let's take an example: ADDCOLS $equipment_type, $weight
