Set LookbackDelta on VectorSelectors from NodeReplacer

With this option we can configure promql to not select previous points on certain VectorSelectors when iterating. This is important as we have pulled the data from another promql interface and as such don't want to re-do the full LookbackDelta when selecting within the vector. Fixes #298
jacksontj · May 14, 2020 · f8bae29 · f8bae29
1 parent 6f84319
commit f8bae29
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Showing 4 changed files with 16 additions and 7 deletions.
diff --git a/Gopkg.lock b/Gopkg.lock
diff --git a/pkg/proxystorage/proxy.go b/pkg/proxystorage/proxy.go
@@ -507,6 +507,7 @@ func (p *ProxyStorage) NodeReplacer(ctx context.Context, s *promql.EvalStmt, nod
 		var warnings api.Warnings
 		var err error
 		if s.Interval > 0 {
+			n.LookbackDelta = s.Interval - time.Duration(1)
 			result, warnings, err = state.client.QueryRange(ctx, n.String(), v1.Range{
 				Start: s.Start.Add(-offset),
 				End:   s.End.Add(-offset),

diff --git a/vendor/github.com/prometheus/prometheus/promql/ast.go b/vendor/github.com/prometheus/prometheus/promql/ast.go
diff --git a/vendor/github.com/prometheus/prometheus/promql/engine.go b/vendor/github.com/prometheus/prometheus/promql/engine.go