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https://issues.apache.org/jira/browse/DRILL-7652?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Charles Givre updated DRILL-7652:
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Summary: Add time_bucket() Function for Time Series Analysis (was: Add
time_bucket() function for time series analysis.)
> Add time_bucket() Function for Time Series Analysis
> ---------------------------------------------------
>
> Key: DRILL-7652
> URL: https://issues.apache.org/jira/browse/DRILL-7652
> Project: Apache Drill
> Issue Type: Improvement
> Affects Versions: 1.17.0
> Reporter: Charles Givre
> Priority: Major
> Fix For: 1.18.0
>
>
> These functions are useful for doing time series analysis by grouping the
> data into arbitrary intervals. See:
> https://blog.timescale.com/blog/simplified-time-series-analytics
> -using-the-time_bucket-function/ for more examples.
> There are two versions of the function:
> * `time_bucket(<timestamp>, <interval>)`
> * `time_bucket_ns(<timestamp>,<interval>)`
> Both functions accept a `BIGINT` timestamp and an interval in milliseconds as
> arguments. The `time_bucket_ns()` function accepts timestamps in nanoseconds
> and `time_bucket
> ()` accepts timestamps in milliseconds. Both return timestamps in the
> original format.
> ### Example:
> The query below calculates the average for the `cpu` metric for every five
> minute interval.
> ```sql
> SELECT time_bucket(time_stamp, 30000) AS five_min, avg(cpu)
> FROM metrics
> GROUP BY five_min
> ORDER BY five_min DESC LIMIT 12;
> ```
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