Influxdb: Can't use ABS with aggregations

[Raniz85]

__System info:__ InfluxDB 1.6.2, Ubuntu 16.04.3

__Steps to reproduce:__

1. Have measurements with both negative and positive values
2. Run a query requesting the sum of the absolute values

__Expected behavior:__
SUM(ABS("value")) should return the sum of the absolute values of _value_. - e.g. if the values are -1, 3, -5 the result should be 9.

__Actual behavior:__

ERR: expected field argument in sum()

__Additional information:__
I've tried with MEAN(SUM("value")) too and that gives a similar error.

[divankovic]

I think that influx doesn't support nesting functions with sum and mean, they must receive a field argument, as it says. Try using a nested query.

[e-dard]

We don't support these nested functions.

[semakamisli]

Are there any enhancement related with issue? I have similar problem using ABS with aggregation.