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Merge pull request #13085 from dimitarvdimitrov/dimitar/expose-findQueryMinMaxTime

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Export `promql.FindMinMaxTime`
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Julien Pivotto 2023-11-02 14:02:17 -04:00 committed by GitHub
parent 7eaefcf379 9e3df532d8
commit caec414964
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 8 additions and 5 deletions
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13
promql/engine.go
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@ -674,7 +674,7 @@ func durationMilliseconds(d time.Duration) int64 {
// execEvalStmt evaluates the expression of an evaluation statement for the given time range.
func (ng *Engine) execEvalStmt(ctx context.Context, query *query, s *parser.EvalStmt) (parser.Value, annotations.Annotations, error) {
prepareSpanTimer, ctxPrepare := query.stats.GetSpanTimer(ctx, stats.QueryPreparationTime, ng.metrics.queryPrepareTime)
mint, maxt := ng.findMinMaxTime(s)
mint, maxt := FindMinMaxTime(s)
querier, err := query.queryable.Querier(mint, maxt)
if err != nil {
prepareSpanTimer.Finish()
@ -816,7 +816,10 @@ func subqueryTimes(path []parser.Node) (time.Duration, time.Duration, *int64) {
return subqOffset, subqRange, tsp
}
func (ng *Engine) findMinMaxTime(s *parser.EvalStmt) (int64, int64) {
// FindMinMaxTime returns the time in milliseconds of the earliest and latest point in time the statement will try to process.
// This takes into account offsets, @ modifiers, and range selectors.
// If the statement does not select series, then FindMinMaxTime returns (0, 0).
func FindMinMaxTime(s *parser.EvalStmt) (int64, int64) {
var minTimestamp, maxTimestamp int64 = math.MaxInt64, math.MinInt64
// Whenever a MatrixSelector is evaluated, evalRange is set to the corresponding range.
// The evaluation of the VectorSelector inside then evaluates the given range and unsets
@ -825,7 +828,7 @@ func (ng *Engine) findMinMaxTime(s *parser.EvalStmt) (int64, int64) {
parser.Inspect(s.Expr, func(node parser.Node, path []parser.Node) error {
switch n := node.(type) {
case *parser.VectorSelector:
start, end := ng.getTimeRangesForSelector(s, n, path, evalRange)
start, end := getTimeRangesForSelector(s, n, path, evalRange)
if start < minTimestamp {
minTimestamp = start
}
@ -848,7 +851,7 @@ func (ng *Engine) findMinMaxTime(s *parser.EvalStmt) (int64, int64) {
return minTimestamp, maxTimestamp
}
func (ng *Engine) getTimeRangesForSelector(s *parser.EvalStmt, n *parser.VectorSelector, path []parser.Node, evalRange time.Duration) (int64, int64) {
func getTimeRangesForSelector(s *parser.EvalStmt, n *parser.VectorSelector, path []parser.Node, evalRange time.Duration) (int64, int64) {
start, end := timestamp.FromTime(s.Start), timestamp.FromTime(s.End)
subqOffset, subqRange, subqTs := subqueryTimes(path)
@ -905,7 +908,7 @@ func (ng *Engine) populateSeries(ctx context.Context, querier storage.Querier, s
parser.Inspect(s.Expr, func(node parser.Node, path []parser.Node) error {
switch n := node.(type) {
case *parser.VectorSelector:
start, end := ng.getTimeRangesForSelector(s, n, path, evalRange)
start, end := getTimeRangesForSelector(s, n, path, evalRange)
interval := ng.getLastSubqueryInterval(path)
if interval == 0 {
interval = s.Interval