min and max as binary operators

[xinau]

Proposal

Adding min and max as binary operators to promql.

Use case. Why is this important?
I've got two different timeseries and want to join them by using the maximum value of the two.
For example

timeseries_a{foo="bar"} 4
timeseries_b{foo="bar"} 7

I would like to do the following promql

timeseries_a bin_op_max timeseries_b

instead off doing something like this
https://www.maa.org/programs/faculty-and-departments/classroom-capsules-and-notes/the-maximum-and-minimum-of-two-numbers-using-the-quadratic-formula

# for maximum
(timeseries_a + timeseries_b + abs(timeseries_a - timeseries_b)) / 2
(vector(4) + vector(7) + abs(vector(4) - vector(7))) / 2
# for minimum
(timeseries_a + timeseries_b - abs(timeseries_a - timeseries_b)) / 2
(vector(4) + vector(7) - abs(vector(4) - vector(7))) / 2

, as this can get difficult with (on, group_left ...)

[brian-brazil]

You can do a > b or b

[xinau]

Thank you @brian-brazil.