Module ascent::aggregators

This module provides aggregators that can be used in Ascent rules.

eg: Writing the average of foo in bar

use ascent::ascent;
use ascent::aggregators::*;
ascent!{
  relation foo(i32);
  relation bar(i32);
  // ...
  bar(m as i32) <-- agg m = mean(x) in foo(x);   
}

Functions

• count
  returns the number of tuples
• max
  computes the maximum of the input column
• mean
  computes the average of the input column, returning an f64
• min
  computes the minimum of the input column
• not
  backs negations (eg !foo(x)) in ascent
• percentile
  computes the value at the given percentile of the input column
• sum
  computes the sum of the input column