Summary
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undefined(attribute_name)
undefined returns true if a specified attribute does not exist on a span or metric.
Supported Pipelines: spans, metric
Applicable Stages: filter, spans_sample, trace_filter
undefined is not available for alerts.
Arguments
| Name | Type | Required/Optional | Description |
|---|---|---|---|
| attribute_name | string | Required | Name of the attribute on span or metric to check absence |
Examples
Checking for attribute compliance
When enforcing an attribute policy for instrumentation, you’ll need to know which services are out of compliance. The query below will show service and operation pairs that are missing the k8.pod.name attribute:
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spans count
| delta
| filter undefined(k8.pod.name)
| group_by [service, operation], sum
See also
Updated Jun 6, 2023