mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-25 11:50:13 +01:00
544 lines
12 KiB
Go
544 lines
12 KiB
Go
package promql
|
|
|
|
import (
|
|
"fmt"
|
|
"math"
|
|
"strings"
|
|
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/lib/storage"
|
|
)
|
|
|
|
var binaryOpFuncs = map[string]binaryOpFunc{
|
|
"+": newBinaryOpArithFunc(binaryOpPlus),
|
|
"-": newBinaryOpArithFunc(binaryOpMinus),
|
|
"*": newBinaryOpArithFunc(binaryOpMul),
|
|
"/": newBinaryOpArithFunc(binaryOpDiv),
|
|
"%": newBinaryOpArithFunc(binaryOpMod),
|
|
"^": newBinaryOpArithFunc(binaryOpPow),
|
|
|
|
// cmp ops
|
|
"==": newBinaryOpCmpFunc(binaryOpEq),
|
|
"!=": newBinaryOpCmpFunc(binaryOpNeq),
|
|
">": newBinaryOpCmpFunc(binaryOpGt),
|
|
"<": newBinaryOpCmpFunc(binaryOpLt),
|
|
">=": newBinaryOpCmpFunc(binaryOpGte),
|
|
"<=": newBinaryOpCmpFunc(binaryOpLte),
|
|
|
|
// logical set ops
|
|
"and": binaryOpAnd,
|
|
"or": binaryOpOr,
|
|
"unless": binaryOpUnless,
|
|
|
|
// New op
|
|
"if": newBinaryOpArithFunc(binaryOpIf),
|
|
"ifnot": newBinaryOpArithFunc(binaryOpIfnot),
|
|
"default": newBinaryOpArithFunc(binaryOpDefault),
|
|
}
|
|
|
|
var binaryOpPriorities = map[string]int{
|
|
"default": -1,
|
|
|
|
"if": 0,
|
|
"ifnot": 0,
|
|
|
|
// See https://prometheus.io/docs/prometheus/latest/querying/operators/#binary-operator-precedence
|
|
"or": 1,
|
|
|
|
"and": 2,
|
|
"unless": 2,
|
|
|
|
"==": 3,
|
|
"!=": 3,
|
|
"<": 3,
|
|
">": 3,
|
|
"<=": 3,
|
|
">=": 3,
|
|
|
|
"+": 4,
|
|
"-": 4,
|
|
|
|
"*": 5,
|
|
"/": 5,
|
|
"%": 5,
|
|
|
|
"^": 6,
|
|
}
|
|
|
|
func getBinaryOpFunc(op string) binaryOpFunc {
|
|
op = strings.ToLower(op)
|
|
return binaryOpFuncs[op]
|
|
}
|
|
|
|
func isBinaryOp(op string) bool {
|
|
return getBinaryOpFunc(op) != nil
|
|
}
|
|
|
|
func binaryOpPriority(op string) int {
|
|
op = strings.ToLower(op)
|
|
return binaryOpPriorities[op]
|
|
}
|
|
|
|
func scanBinaryOpPrefix(s string) int {
|
|
n := 0
|
|
for op := range binaryOpFuncs {
|
|
if len(s) < len(op) {
|
|
continue
|
|
}
|
|
ss := strings.ToLower(s[:len(op)])
|
|
if ss == op && len(op) > n {
|
|
n = len(op)
|
|
}
|
|
}
|
|
return n
|
|
}
|
|
|
|
func isRightAssociativeBinaryOp(op string) bool {
|
|
// See https://prometheus.io/docs/prometheus/latest/querying/operators/#binary-operator-precedence
|
|
return op == "^"
|
|
}
|
|
|
|
func isBinaryOpGroupModifier(s string) bool {
|
|
s = strings.ToLower(s)
|
|
switch s {
|
|
// See https://prometheus.io/docs/prometheus/latest/querying/operators/#vector-matching
|
|
case "on", "ignoring":
|
|
return true
|
|
default:
|
|
return false
|
|
}
|
|
}
|
|
|
|
func isBinaryOpJoinModifier(s string) bool {
|
|
s = strings.ToLower(s)
|
|
switch s {
|
|
case "group_left", "group_right":
|
|
return true
|
|
default:
|
|
return false
|
|
}
|
|
}
|
|
|
|
func isBinaryOpBoolModifier(s string) bool {
|
|
s = strings.ToLower(s)
|
|
return s == "bool"
|
|
}
|
|
|
|
func isBinaryOpCmp(op string) bool {
|
|
switch op {
|
|
case "==", "!=", ">", "<", ">=", "<=":
|
|
return true
|
|
default:
|
|
return false
|
|
}
|
|
}
|
|
|
|
func isBinaryOpLogicalSet(op string) bool {
|
|
op = strings.ToLower(op)
|
|
switch op {
|
|
case "and", "or", "unless":
|
|
return true
|
|
default:
|
|
return false
|
|
}
|
|
}
|
|
|
|
func binaryOpConstants(op string, left, right float64, isBool bool) float64 {
|
|
if isBinaryOpCmp(op) {
|
|
evalCmp := func(cf func(left, right float64) bool) float64 {
|
|
if isBool {
|
|
if cf(left, right) {
|
|
return 1
|
|
}
|
|
return 0
|
|
}
|
|
if cf(left, right) {
|
|
return left
|
|
}
|
|
return nan
|
|
}
|
|
switch op {
|
|
case "==":
|
|
left = evalCmp(binaryOpEq)
|
|
case "!=":
|
|
left = evalCmp(binaryOpNeq)
|
|
case ">":
|
|
left = evalCmp(binaryOpGt)
|
|
case "<":
|
|
left = evalCmp(binaryOpLt)
|
|
case ">=":
|
|
left = evalCmp(binaryOpGte)
|
|
case "<=":
|
|
left = evalCmp(binaryOpLte)
|
|
default:
|
|
logger.Panicf("BUG: unexpected comparison binaryOp: %q", op)
|
|
}
|
|
} else {
|
|
switch op {
|
|
case "+":
|
|
left = binaryOpPlus(left, right)
|
|
case "-":
|
|
left = binaryOpMinus(left, right)
|
|
case "*":
|
|
left = binaryOpMul(left, right)
|
|
case "/":
|
|
left = binaryOpDiv(left, right)
|
|
case "%":
|
|
left = binaryOpMod(left, right)
|
|
case "^":
|
|
left = binaryOpPow(left, right)
|
|
case "and":
|
|
// Nothing to do
|
|
case "or":
|
|
// Nothing to do
|
|
case "unless":
|
|
left = nan
|
|
case "default":
|
|
left = binaryOpDefault(left, right)
|
|
case "if":
|
|
left = binaryOpIf(left, right)
|
|
case "ifnot":
|
|
left = binaryOpIfnot(left, right)
|
|
default:
|
|
logger.Panicf("BUG: unexpected non-comparison binaryOp: %q", op)
|
|
}
|
|
}
|
|
return left
|
|
}
|
|
|
|
type binaryOpFuncArg struct {
|
|
be *binaryOpExpr
|
|
left []*timeseries
|
|
right []*timeseries
|
|
}
|
|
|
|
type binaryOpFunc func(bfa *binaryOpFuncArg) ([]*timeseries, error)
|
|
|
|
func newBinaryOpCmpFunc(cf func(left, right float64) bool) binaryOpFunc {
|
|
cfe := func(left, right float64, isBool bool) float64 {
|
|
if !isBool {
|
|
if cf(left, right) {
|
|
return left
|
|
}
|
|
return nan
|
|
}
|
|
if cf(left, right) {
|
|
return 1
|
|
}
|
|
return 0
|
|
}
|
|
return newBinaryOpFunc(cfe)
|
|
}
|
|
|
|
func newBinaryOpArithFunc(af func(left, right float64) float64) binaryOpFunc {
|
|
afe := func(left, right float64, isBool bool) float64 {
|
|
return af(left, right)
|
|
}
|
|
return newBinaryOpFunc(afe)
|
|
}
|
|
|
|
func newBinaryOpFunc(bf func(left, right float64, isBool bool) float64) binaryOpFunc {
|
|
return func(bfa *binaryOpFuncArg) ([]*timeseries, error) {
|
|
isBool := bfa.be.Bool
|
|
left, right, dst, err := adjustBinaryOpTags(bfa.be, bfa.left, bfa.right)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if len(left) != len(right) || len(left) != len(dst) {
|
|
logger.Panicf("BUG: len(left) must match len(right) and len(dst); got %d vs %d vs %d", len(left), len(right), len(dst))
|
|
}
|
|
for i, tsLeft := range left {
|
|
leftValues := tsLeft.Values
|
|
rightValues := right[i].Values
|
|
dstValues := dst[i].Values
|
|
if len(leftValues) != len(rightValues) || len(leftValues) != len(dstValues) {
|
|
logger.Panicf("BUG: len(leftVaues) must match len(rightValues) and len(dstValues); got %d vs %d vs %d",
|
|
len(leftValues), len(rightValues), len(dstValues))
|
|
}
|
|
for j, a := range leftValues {
|
|
b := rightValues[j]
|
|
dstValues[j] = bf(a, b, isBool)
|
|
}
|
|
}
|
|
// Optimization: remove time series containing only NaNs.
|
|
// This is quite common after applying filters like `q > 0`.
|
|
dst = removeNaNs(dst)
|
|
return dst, nil
|
|
}
|
|
}
|
|
|
|
func adjustBinaryOpTags(be *binaryOpExpr, left, right []*timeseries) ([]*timeseries, []*timeseries, []*timeseries, error) {
|
|
if len(be.GroupModifier.Op) == 0 && len(be.JoinModifier.Op) == 0 {
|
|
if isScalar(left) {
|
|
// Fast path: `scalar op vector`
|
|
rvsLeft := make([]*timeseries, len(right))
|
|
tsLeft := left[0]
|
|
for i, tsRight := range right {
|
|
resetMetricGroupIfRequired(be, tsRight)
|
|
rvsLeft[i] = tsLeft
|
|
}
|
|
return rvsLeft, right, right, nil
|
|
}
|
|
if isScalar(right) {
|
|
// Fast path: `vector op scalar`
|
|
rvsRight := make([]*timeseries, len(left))
|
|
tsRight := right[0]
|
|
for i, tsLeft := range left {
|
|
resetMetricGroupIfRequired(be, tsLeft)
|
|
rvsRight[i] = tsRight
|
|
}
|
|
return left, rvsRight, left, nil
|
|
}
|
|
}
|
|
|
|
// Slow path: `vector op vector` or `a op {on|ignoring} {group_left|group_right} b`
|
|
ensureOneX := func(side string, tss []*timeseries) error {
|
|
if len(tss) == 0 {
|
|
logger.Panicf("BUG: tss must contain at least one value")
|
|
}
|
|
if len(tss) == 1 {
|
|
return nil
|
|
}
|
|
if mergeNonOverlappingTimeseries(tss) {
|
|
return nil
|
|
}
|
|
return fmt.Errorf(`duplicate timeseries on the %s side of %s %s: %s and %s`, side, be.Op, be.GroupModifier.AppendString(nil),
|
|
stringMetricTags(&tss[0].MetricName), stringMetricTags(&tss[1].MetricName))
|
|
}
|
|
|
|
var rvsLeft, rvsRight []*timeseries
|
|
mLeft, mRight := createTimeseriesMapByTagSet(be, left, right)
|
|
joinOp := strings.ToLower(be.JoinModifier.Op)
|
|
joinTags := be.JoinModifier.Args
|
|
for k, tssLeft := range mLeft {
|
|
tssRight := mRight[k]
|
|
if len(tssRight) == 0 {
|
|
continue
|
|
}
|
|
switch joinOp {
|
|
case "group_left":
|
|
if err := ensureOneX("right", tssRight); err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
src := tssRight[0]
|
|
for _, ts := range tssLeft {
|
|
ts.MetricName.AddMissingTags(joinTags, &src.MetricName)
|
|
rvsLeft = append(rvsLeft, ts)
|
|
rvsRight = append(rvsRight, src)
|
|
}
|
|
case "group_right":
|
|
if err := ensureOneX("left", tssLeft); err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
src := tssLeft[0]
|
|
for _, ts := range tssRight {
|
|
ts.MetricName.AddMissingTags(joinTags, &src.MetricName)
|
|
rvsLeft = append(rvsLeft, src)
|
|
rvsRight = append(rvsRight, ts)
|
|
}
|
|
case "":
|
|
if err := ensureOneX("left", tssLeft); err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
if err := ensureOneX("right", tssRight); err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
resetMetricGroupIfRequired(be, tssLeft[0])
|
|
rvsLeft = append(rvsLeft, tssLeft[0])
|
|
rvsRight = append(rvsRight, tssRight[0])
|
|
default:
|
|
return nil, nil, nil, fmt.Errorf(`unexpected join modifier %q`, joinOp)
|
|
}
|
|
}
|
|
dst := rvsLeft
|
|
if joinOp == "group_right" {
|
|
dst = rvsRight
|
|
}
|
|
return rvsLeft, rvsRight, dst, nil
|
|
}
|
|
|
|
func resetMetricGroupIfRequired(be *binaryOpExpr, ts *timeseries) {
|
|
if isBinaryOpCmp(be.Op) && !be.Bool {
|
|
// Do not reset MetricGroup for non-boolean `compare` binary ops like Prometheus does.
|
|
return
|
|
}
|
|
switch be.Op {
|
|
case "default", "if", "ifnot":
|
|
// Do not reset MetricGroup for these ops.
|
|
return
|
|
}
|
|
ts.MetricName.ResetMetricGroup()
|
|
}
|
|
|
|
func binaryOpPlus(left, right float64) float64 {
|
|
return left + right
|
|
}
|
|
|
|
func binaryOpMinus(left, right float64) float64 {
|
|
return left - right
|
|
}
|
|
|
|
func binaryOpMul(left, right float64) float64 {
|
|
return left * right
|
|
}
|
|
|
|
func binaryOpDiv(left, right float64) float64 {
|
|
return left / right
|
|
}
|
|
|
|
func binaryOpMod(left, right float64) float64 {
|
|
return math.Mod(left, right)
|
|
}
|
|
|
|
func binaryOpPow(left, right float64) float64 {
|
|
return math.Pow(left, right)
|
|
}
|
|
|
|
func binaryOpDefault(left, right float64) float64 {
|
|
if math.IsNaN(left) {
|
|
return right
|
|
}
|
|
return left
|
|
}
|
|
|
|
func binaryOpIf(left, right float64) float64 {
|
|
if math.IsNaN(right) {
|
|
return nan
|
|
}
|
|
return left
|
|
}
|
|
|
|
func binaryOpIfnot(left, right float64) float64 {
|
|
if math.IsNaN(right) {
|
|
return left
|
|
}
|
|
return nan
|
|
}
|
|
|
|
func binaryOpEq(left, right float64) bool {
|
|
return left == right
|
|
}
|
|
|
|
func binaryOpNeq(left, right float64) bool {
|
|
return left != right
|
|
}
|
|
|
|
func binaryOpGt(left, right float64) bool {
|
|
return left > right
|
|
}
|
|
|
|
func binaryOpLt(left, right float64) bool {
|
|
return left < right
|
|
}
|
|
|
|
func binaryOpGte(left, right float64) bool {
|
|
return left >= right
|
|
}
|
|
|
|
func binaryOpLte(left, right float64) bool {
|
|
return left <= right
|
|
}
|
|
|
|
func binaryOpAnd(bfa *binaryOpFuncArg) ([]*timeseries, error) {
|
|
mLeft, mRight := createTimeseriesMapByTagSet(bfa.be, bfa.left, bfa.right)
|
|
var rvs []*timeseries
|
|
for k := range mRight {
|
|
if tss := mLeft[k]; tss != nil {
|
|
rvs = append(rvs, tss...)
|
|
}
|
|
}
|
|
return rvs, nil
|
|
}
|
|
|
|
func binaryOpOr(bfa *binaryOpFuncArg) ([]*timeseries, error) {
|
|
mLeft, mRight := createTimeseriesMapByTagSet(bfa.be, bfa.left, bfa.right)
|
|
var rvs []*timeseries
|
|
for _, tss := range mLeft {
|
|
rvs = append(rvs, tss...)
|
|
}
|
|
for k, tss := range mRight {
|
|
if mLeft[k] == nil {
|
|
rvs = append(rvs, tss...)
|
|
}
|
|
}
|
|
return rvs, nil
|
|
}
|
|
|
|
func binaryOpUnless(bfa *binaryOpFuncArg) ([]*timeseries, error) {
|
|
mLeft, mRight := createTimeseriesMapByTagSet(bfa.be, bfa.left, bfa.right)
|
|
var rvs []*timeseries
|
|
for k, tss := range mLeft {
|
|
if mRight[k] == nil {
|
|
rvs = append(rvs, tss...)
|
|
}
|
|
}
|
|
return rvs, nil
|
|
}
|
|
|
|
func createTimeseriesMapByTagSet(be *binaryOpExpr, left, right []*timeseries) (map[string][]*timeseries, map[string][]*timeseries) {
|
|
groupTags := be.GroupModifier.Args
|
|
groupOp := strings.ToLower(be.GroupModifier.Op)
|
|
if len(groupOp) == 0 {
|
|
groupOp = "ignoring"
|
|
}
|
|
getTagsMap := func(arg []*timeseries) map[string][]*timeseries {
|
|
bb := bbPool.Get()
|
|
m := make(map[string][]*timeseries, len(arg))
|
|
mn := storage.GetMetricName()
|
|
for _, ts := range arg {
|
|
mn.CopyFrom(&ts.MetricName)
|
|
mn.ResetMetricGroup()
|
|
switch groupOp {
|
|
case "on":
|
|
mn.RemoveTagsOn(groupTags)
|
|
case "ignoring":
|
|
mn.RemoveTagsIgnoring(groupTags)
|
|
default:
|
|
logger.Panicf("BUG: unexpected binary op modifier %q", groupOp)
|
|
}
|
|
bb.B = marshalMetricTagsSorted(bb.B[:0], mn)
|
|
m[string(bb.B)] = append(m[string(bb.B)], ts)
|
|
}
|
|
storage.PutMetricName(mn)
|
|
bbPool.Put(bb)
|
|
return m
|
|
}
|
|
mLeft := getTagsMap(left)
|
|
mRight := getTagsMap(right)
|
|
return mLeft, mRight
|
|
}
|
|
|
|
func isScalar(arg []*timeseries) bool {
|
|
if len(arg) != 1 {
|
|
return false
|
|
}
|
|
mn := &arg[0].MetricName
|
|
if len(mn.MetricGroup) > 0 {
|
|
return false
|
|
}
|
|
return len(mn.Tags) == 0
|
|
}
|
|
|
|
func mergeNonOverlappingTimeseries(tss []*timeseries) bool {
|
|
if len(tss) < 2 {
|
|
logger.Panicf("BUG: expecting at least two timeseries. Got %d", len(tss))
|
|
}
|
|
|
|
// Check whether time series in tss overlap.
|
|
var dst timeseries
|
|
dst.CopyFromShallowTimestamps(tss[0])
|
|
dstValues := dst.Values
|
|
for _, ts := range tss[1:] {
|
|
for i, value := range ts.Values {
|
|
if math.IsNaN(dstValues[i]) {
|
|
dstValues[i] = value
|
|
} else if !math.IsNaN(value) {
|
|
// Time series overlap.
|
|
return false
|
|
}
|
|
}
|
|
}
|
|
tss[0].CopyFromShallowTimestamps(&dst)
|
|
return true
|
|
}
|