Struct promql::Vector

pub struct Vector {
    pub labels: Vec<LabelMatch>,
    pub range: Option<f32>,
    pub offset: Option<f32>,
}

This struct represents both instant and range vectors.

Note that there’s no field for metric name: not only it is optional (as in {instance="localhost", job="foo"}), metric names can actually be matched using special label called __name__ (e.g. {__name__=~"megaexporter_.+"}), so it only makes sense to parse label names into the corresponding label filter, like so:

use promql::*;
use promql::LabelMatchOp::*; // Eq
use nom::IResult;

assert_eq!(
	parse("foo{bar='baz'}".as_bytes(), &Default::default()),
	Ok(Node::Vector(Vector {
		labels: vec![
			// this is the filter for the metric name 'foo'
			LabelMatch { name: "__name__".to_string(), op: Eq, value: b"foo".to_vec(), },
			// here go all the other filters
			LabelMatch { name: "bar".to_string(),      op: Eq, value: b"baz".to_vec(), },
		],
		range: None, offset: None,
	}))
);

Fields

labels: Vec<LabelMatch>

Set of label filters

range: Option<f32>

Range for range vectors, in seconds, e.g. Some(300.) for [5m]

offset: Option<f32>

Offset in seconds, e.g. Some(3600.) for offset 1h

Trait Implementations

impl Debug for Vector

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for Vector

fn eq(&self, other: &Vector) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Vector