# OPAL Special Functions¶

Function

Description

case

Return a matching result if the given condition

group_by

Grouping/partitioning in which to process data. This…

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

valid_for

Specify the validity period for each event for some…

window

Evaluates its argument in windowed context, partitio…