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@Harshith.R.S Do you want to use timestamp variables in clickhouse queries?

@Harshith.R.S the clickhouse query needs to have below templates to use datetime from the dropdown. https://signoz.io/docs/tutorial/writing-clickhouse-queries-in-dashboard/#building-alert-queries-with-clickhouse-data

One can use

{{.SIGNOZ_START_TIME}}

and

{{.SIGNOZ_END_TIME}}

for dashboards. This is in millis so you need to make sure the types match by transforming it. We haven’t documented this because there is no consistent way to work with time values in the system.

for example I want these values to change based on the time dropdown but it does not. all these values are obtained from clickhouse queries what do I need to add in the query to update the data ased on the time dropdown

example I want these values to change based on the time dropdown

Which values are you referring to? There are dropdown values and panel values, all are coming from the ClickHouse. It’s not obvious which ones are you talking about.

panel values need to change based on time dropdown, sorry for not being specific

Panel values change based on the global time filter.

When I'm using query builder or promql yes but not with clickhouse query

What is your query? Did you hardcode the timestamps for in query? As I mentioned you could use the time template variable to get them substituted with global filter values.

One of the queries I'm using is

Select avg(durationNano)/1000000 from signoz_traces.signoz_index_v2

This is querying the whole table. You need to filter on the timestamp column.

SELECT
    avg(durationNano) / 1000000
FROM signoz_traces.signoz_index_v2
WHERE timestamp >= toDateTime({{.SIGNOZ_START_TIME}} / 1e3) AND timestamp <= toDateTime({{.SIGNOZ_END_TIME}} / 1e3)

The

/ 1e3

exists because the global filter timestamp is in millis precision in the request.

Thank you