OptionalcontextKey/value context to record from the input row. Values may contain SQL expressions in braces.
OptionaldefaultIf true, also record every column of the triggering input row. Custom context wins on key collision.
OptionaleventColumn in the rule output that holds the event timestamp.
OptionalsummarySignal summary. May contain SQL expressions in braces that the server substitutes from the input row.
What to record in each signal that this rule generates.