Pq: function time_bucket(unknown, timestamp without time zone) does not exist

Grafana PostgreSQL
1

  • What Grafana version and what operating system are you using?
    v6.5.2

  • What are you trying to achieve?
    Visualizing mutest tests count information segregated by each individual using guage panel

  • How are you trying to achieve it?

  1. I have test cases information in a table called public.muted_tests saved in postgres database.
  • What happened?
  1. When am trying to build the query to pull metrics over time series, am getting error in grafana.
    Here is the query:
SELECT
  $__timeGroupAlias("timestamp",$__interval),
  mutedtestcounts
FROM muted_tests
WHERE
  $__timeFilter("timestamp")
GROUP BY 1
ORDER BY 1

here is the generated sql what is shows:

SELECT
  time_bucket('1200s',"timestamp") AS "time",
  mutedtestcounts
FROM muted_tests
WHERE
  "timestamp" BETWEEN '2021-07-06T18:04:34.761Z' AND '2021-08-05T18:04:34.761Z'
GROUP BY 1
ORDER BY 1

And here is the error what i get to see:
pq: function time_bucket(unknown, timestamp without time zone) does not exist

1 Like
2

Hi @pavannayakanti ,

do you have TimescaleDB installed? Becase timebucket is TimescaleDB function.

You have 2 options:

  1. Install TimescaleDB using https://docs.timescale.com/timescaledb/latest/how-to-guides/install-timescaledb/
  2. Or use PG date_trunc function

Regards,
Sergejs

3

Thanks for these inputs.
I have been using postgres db to save this time series information. This is what my db consists of

bitbucketdb_dev=# select timestamp, userid, mutedtestscount from muted_tests limit 10;
      timestamp      | userid | mutedtestscount
---------------------+--------+-----------------
 2021-08-05 06:54:00 | abc123 | 1
 2021-08-05 06:54:00 | abc123 | 1
 2021-08-05 06:54:00 | def456 | 1
 2021-08-05 06:54:00 | abc123 | 1
 2021-08-05 06:54:00 | abc123 | 2
 2021-08-05 06:54:00 | abc123 | 1
 2021-08-05 06:54:00 | koz963 | 1
 2021-08-05 06:54:00 | koz963 | 1
 2021-08-05 06:54:00 | abc123 | 1

And am using the same datasource in grafana for visualizations. Am not sure if there is any way i can insist grafana to use data_trunc instead of data_bucket.
Capture

by any chance, is my choice of opting to postgresql incorrect for my requirement?
please advise.

4

What happens if you ran that generated query in pg

5

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