diff --git a/app/vmselect/promql/eval.go b/app/vmselect/promql/eval.go index 36baaaa406..ff21d1763d 100644 --- a/app/vmselect/promql/eval.go +++ b/app/vmselect/promql/eval.go @@ -300,7 +300,7 @@ func evalExpr(ec *EvalConfig, e metricsql.Expr) ([]*timeseries, error) { } var err error var tssLeft, tssRight []*timeseries - switch be.Op { + switch strings.ToLower(be.Op) { case "and", "if": // Fetch right-side series at first, since the left side of `and` and `if` operator // usually contains lower number of time series. This should produce more specific label filters