prometheus/promql/promqltest/testdata/name_label_dropping.test

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# Test for __name__ label drop.
load 5m
metric{env="1"} 0 60 120
another_metric{env="1"} 60 120 180
# Does not drop __name__ for vector selector
eval instant at 10m metric{env="1"}
metric{env="1"} 120
# Drops __name__ for unary operators
eval instant at 10m -metric
{env="1"} -120
# Drops __name__ for binary operators
eval instant at 10m metric + another_metric
{env="1"} 300
# Does not drop __name__ for binary comparison operators
eval instant at 10m metric <= another_metric
metric{env="1"} 120
# Drops __name__ for binary comparison operators with "bool" modifier
eval instant at 10m metric <= bool another_metric
{env="1"} 1
# Drops __name__ for vector-scalar operations
eval instant at 10m metric * 2
{env="1"} 240
# Drops __name__ for instant-vector functions
eval instant at 10m clamp(metric, 0, 100)
{env="1"} 100
# Drops __name__ for round function
eval instant at 10m round(metric)
{env="1"} 120
# Drops __name__ for range-vector functions
eval instant at 10m rate(metric{env="1"}[10m])
{env="1"} 0.2
# Does not drop __name__ for last_over_time function
eval instant at 10m last_over_time(metric{env="1"}[10m])
metric{env="1"} 120
# Drops name for other _over_time functions
eval instant at 10m max_over_time(metric{env="1"}[10m])
{env="1"} 120
# Allows relabeling (to-be-dropped) __name__ via label_replace
eval instant at 10m label_replace(rate({env="1"}[10m]), "my_name", "rate_$1", "__name__", "(.+)")
{my_name="rate_metric", env="1"} 0.2
{my_name="rate_another_metric", env="1"} 0.2
# Allows preserving __name__ via label_replace
eval instant at 10m label_replace(rate({env="1"}[10m]), "__name__", "rate_$1", "__name__", "(.+)")
rate_metric{env="1"} 0.2
rate_another_metric{env="1"} 0.2
# Allows relabeling (to-be-dropped) __name__ via label_join
eval instant at 10m label_join(rate({env="1"}[10m]), "my_name", "_", "__name__")
{my_name="metric", env="1"} 0.2
{my_name="another_metric", env="1"} 0.2
# Allows preserving __name__ via label_join
eval instant at 10m label_join(rate({env="1"}[10m]), "__name__", "_", "__name__", "env")
metric_1{env="1"} 0.2
another_metric_1{env="1"} 0.2
# Does not drop metric names fro aggregation operators
eval instant at 10m sum by (__name__, env) (metric{env="1"})
metric{env="1"} 120
# Aggregation operators by __name__ lead to duplicate labelset errors (aggregation is partitioned by not yet removed __name__ label)
# This is an accidental side effect of delayed __name__ label dropping
eval_fail instant at 10m sum by (__name__) (rate({env="1"}[10m]))
# Aggregation operators aggregate metrics with same labelset and to-be-dropped names
# This is an accidental side effect of delayed __name__ label dropping
eval instant at 10m sum(rate({env="1"}[10m])) by (env)
{env="1"} 0.4
# Aggregationk operators propagate __name__ label dropping information
eval instant at 10m topk(10, sum by (__name__, env) (metric{env="1"}))
metric{env="1"} 120
eval instant at 10m topk(10, sum by (__name__, env) (rate(metric{env="1"}[10m])))
{env="1"} 0.2