The total number of points seen while calculating the CounterSummary. Only points with distinct times are counted, as duplicate times are usually discarded in these calculations.
num_elements(summary CounterSummary) RETURNS BIGINT
For more information about counter aggregation functions, see the hyperfunctions documentation.
|summary||CounterSummary||The input CounterSummary from a counter_agg call|
|num_elements||BIGINT||The number of points seen during the counter_agg call|
SELECTid,bucket,num_elements(summary)FROM (SELECTid,time_bucket('15 min'::interval, ts) AS bucket,counter_agg(ts, val) AS summaryFROM fooGROUP BY id, time_bucket('15 min'::interval, ts)) t
Found an issue on this page?Report an issue!