OPAL Special Functions

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

Function	Description
case	Return a matching result if the given condition is 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
valid_for	Specify the validity period for each event for some verbs
window	Evaluates its argument in windowed context, partitioned over the given grouping and ordered by the given ordering (by default