OPAL Special Functions

Special functions implement flow control-like structures or other control semantics.

Function	Description
case	Return a matching result if any of the multiple given conditions are true.
group_by	Grouping/partitioning in which to process data.
m	Select a metric for the align verb.
metric	Select the metrics in the rollup verb.
options	Specify options to change the verb’s behavior
primary_key	Specify the primary key for some verbs
tags	Used to specify tags to publish a metric dataset.
valid_for	Specify the validity period for each event for some verbs
window	Evaluate OPAL within time windows.