Details
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New Feature
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Status: Closed
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Major
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Resolution: Fixed
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None
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None
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None
Description
Usecase:
I want to group based on time windows (as defined by the `date_trunc` function).
For example, given the table:
+------+-------------------+---------------------+-------------+------------------+-------------------+--------------+-----------+------------+---------------+-------------+--------------------+--------------------+ | cpu | host | time | usage_guest | usage_guest_nice | usage_idle | usage_iowait | usage_irq | usage_nice | usage_softirq | usage_steal | usage_system | usage_user | +------+-------------------+---------------------+-------------+------------------+-------------------+--------------+-----------+------------+---------------+-------------+--------------------+--------------------+ | cpu0 | MacBook-Pro.local | 1617130130000000000 | 0 | 0 | 65.30408773649165 | 0 | 0 | 0 | 0 | 0 | 18.444666002000673 | 16.251246261217506 | | cpu1 | MacBook-Pro.local | 1617130130000000000 | 0 | 0 | 84.43113772402216 | 0 | 0 | 0 | 0 | 0 | 3.193612774446795 | 12.37524950097282 | | cpu2 | MacBook-Pro.local | 1617130130000000000 | 0 | 0 | 65.96806387199344 | 0 | 0 | 0 | 0 | 0 | 15.469061876247794 | 18.56287425146831 | | cpu3 | MacBook-Pro.local | 1617130130000000000 | 0 | 0 | 84.0478564307993 | 0 | 0 | 0 | 0 | 0 | 3.0907278165770684 | 12.861415752863932 | | cpu4 | MacBook-Pro.local | 1617130130000000000 | 0 | 0 | 63.21036889281897 | 0 | 0 | 0 | 0 | 0 | 13.758723828377473 | 23.030907278223218 | | cpu5 | MacBook-Pro.local | 1617130130000000000 | 0 | 0 | 83.94815553242313 | 0 | 0 | 0 | 0 | 0 | 2.991026919231221 | 13.0608175473346 | | cpu6 | MacBook-Pro.local | 1617130130000000000 | 0 | 0 | 70.85828343276965 | 0 | 0 | 0 | 0 | 0 | 12.87425149699077 | 16.26746506987651 | | cpu7 | MacBook-Pro.local | 1617130130000000000 | 0 | 0 | 83.9321357287122 | 0 | 0 | 0 | 0 | 0 | 3.093812375243205 | 12.974051896176206 | | cpu8 | MacBook-Pro.local | 1617130130000000000 | 0 | 0 | 74.80079681313936 | 0 | 0 | 0 | 0 | 0 | 10.756972111708253 | 14.442231075949556 | | cpu9 | MacBook-Pro.local | 1617130130000000000 | 0 | 0 | 83.84845463618315 | 0 | 0 | 0 | 0 | 0 | 3.0907278165434624 | 13.060817547316466 | +------+-------------------+---------------------+-------------+------------------+-------------------+--------------+-----------+------------+---------------+-------------+--------------------+--------------------+
I want to be able to find the min and max usage time grouped by minute
select date_trunc('minute', cast (time as timestamp)), min(usage_user), max(usage_user) from cpu group by date_trunc('minute', cast (time as timestamp)), min(usage_user)"
Or alternately
select date_trunc('minute', cast (time as timestamp)), min(usage_user), max(usage_user) from cpu group by 1
Instead as of now I get a planning error: Error preparing query Error during planning: Projection references non-aggregate values