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SELECT DISTINCT JSONExtractString(labels, 'job') AS job
FROM signoz_metrics.distributed_time_series_v2
WHERE metric_name = 'gitstart_engine_prom_ex_prom_ex_status_info'

https://signoz.io/docs/userguide/manage-variables/#supported-variables-types

It returns no data

Are you sure the metric and label exist in your sending data?

Aaa it doesn’t return data either in grafana