Fix for instant selector queries

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/optimizer/LogicalPlanOptimizer.java

@@ -117,10 +117,10 @@ public LogicalPlanOptimizer(LogicalOptimizerContext optimizerContext) {
     public LogicalPlan optimize(LogicalPlan verified) {
         var optimized = execute(verified);
 
-//        Failures failures = verifier.verify(optimized, verified.output());
-//        if (failures.hasFailures()) {
-//            throw new VerificationException(failures);
-//        }
+        // Failures failures = verifier.verify(optimized, verified.output());
+        // if (failures.hasFailures()) {
+        // throw new VerificationException(failures);
+        // }
         optimized.setOptimized();
         return optimized;
     }

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/parser/promql/PromqlLogicalPlanBuilder.java

@@ -118,23 +118,24 @@ public LogicalPlan visitSelector(PromqlBaseParser.SelectorContext ctx) {
                 throw new ParsingException(source(labelsCtx), "Vector selector must contain at least one non-empty matcher");
             }
         }
+        final LabelMatchers matchers = new LabelMatchers(labels);
+        UnresolvedAttribute timestamp = new UnresolvedAttribute(source, MetadataAttribute.TIMESTAMP_FIELD);
+
         Evaluation evaluation = visitEvaluation(ctx.evaluation());
-        TimeValue range = visitDuration(ctx.duration());
-        // TODO: TimeValue might not be needed after all
-        Expression rangeEx = new Literal(source(ctx.duration()), Duration.ofSeconds(range.getSeconds()), DataType.TIME_DURATION);
         // fall back to default
         if (evaluation == null) {
             evaluation = new Evaluation(start);
         }
-
-        final LabelMatchers matchers = new LabelMatchers(labels);
         final Evaluation finalEvaluation = evaluation;
+        PromqlBaseParser.DurationContext duration = ctx.duration();
+        if (duration == null) {
+            return new InstantSelector(source, series, labelExpressions, matchers, finalEvaluation, timestamp);
+        }
+        TimeValue range = visitDuration(duration);
+        // TODO: TimeValue might not be needed after all
+        Expression rangeEx = new Literal(source(duration), Duration.ofSeconds(range.getSeconds()), DataType.TIME_DURATION);
 
-        UnresolvedAttribute timestamp = new UnresolvedAttribute(source, MetadataAttribute.TIMESTAMP_FIELD);
-
-        return range == null
-            ? new InstantSelector(source, series, labelExpressions, matchers, finalEvaluation, timestamp)
-            : new RangeSelector(source, series, labelExpressions, matchers, rangeEx, finalEvaluation, timestamp);
+        return new RangeSelector(source, series, labelExpressions, matchers, rangeEx, finalEvaluation, timestamp);
     }
 
     @Override

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/plan/logical/promql/PromqlCommand.java

@@ -102,9 +102,9 @@ public int hashCode() {
     public boolean equals(Object obj) {
         if (super.equals(obj)) {
 
-        PromqlCommand other = (PromqlCommand) obj;
-        return Objects.equals(child(), other.child()) && Objects.equals(promqlPlan, other.promqlPlan);
-    }
+            PromqlCommand other = (PromqlCommand) obj;
+            return Objects.equals(child(), other.child()) && Objects.equals(promqlPlan, other.promqlPlan);
+        }
 
         return false;
     }

x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/optimizer/promql/PromqlLogicalPlanOptimizerTests.java

@@ -9,7 +9,6 @@
 
 import org.elasticsearch.TransportVersion;
 import org.elasticsearch.index.IndexMode;
-import org.elasticsearch.transport.Transport;
 import org.elasticsearch.xpack.esql.EsqlTestUtils;
 import org.elasticsearch.xpack.esql.action.EsqlCapabilities;
 import org.elasticsearch.xpack.esql.analysis.Analyzer;
@@ -23,7 +22,6 @@
 import org.elasticsearch.xpack.esql.plan.logical.LogicalPlan;
 import org.junit.BeforeClass;
 
-import java.util.Collections;
 import java.util.Map;
 
 import static java.util.Collections.emptyMap;