Pick up TimestampAware interface from main

Author: costin

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

@@ -11,8 +11,8 @@
 import org.elasticsearch.core.TimeValue;
 import org.elasticsearch.xpack.esql.core.expression.Expression;
 import org.elasticsearch.xpack.esql.core.expression.Literal;
-import org.elasticsearch.xpack.esql.core.expression.MetadataAttribute;
 import org.elasticsearch.xpack.esql.core.expression.UnresolvedAttribute;
+import org.elasticsearch.xpack.esql.core.expression.UnresolvedTimestamp;
 import org.elasticsearch.xpack.esql.core.tree.Node;
 import org.elasticsearch.xpack.esql.core.tree.Source;
 import org.elasticsearch.xpack.esql.core.type.DataType;
@@ -134,7 +134,7 @@ public LogicalPlan visitSelector(PromqlBaseParser.SelectorContext ctx) {
         final LabelMatchers matchers = new LabelMatchers(labels);
         final Evaluation finalEvaluation = evaluation;
 
-        UnresolvedAttribute timestamp = new UnresolvedAttribute(source, MetadataAttribute.TIMESTAMP_FIELD);
+        UnresolvedTimestamp timestamp = new UnresolvedTimestamp(source);
 
         return rangeEx == null
             ? new InstantSelector(source, series, labelExpressions, matchers, finalEvaluation, timestamp)

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

@@ -12,19 +12,21 @@
 import org.elasticsearch.xpack.esql.core.expression.Attribute;
 import org.elasticsearch.xpack.esql.core.expression.Expression;
 import org.elasticsearch.xpack.esql.core.tree.Source;
+import org.elasticsearch.xpack.esql.expression.function.TimestampAware;
 import org.elasticsearch.xpack.esql.plan.logical.LogicalPlan;
 import org.elasticsearch.xpack.esql.plan.logical.UnaryPlan;
 import org.elasticsearch.xpack.esql.plan.logical.promql.PlaceholderRelation;
 
 import java.io.IOException;
+import java.sql.Time;
 import java.util.List;
 import java.util.Objects;
 
 /**
  * Base class representing a PromQL vector selector.
  * A vector selector is defined by a set of label matchers and a point in time evaluation context.
  */
-public abstract class Selector extends UnaryPlan {
+public abstract class Selector extends UnaryPlan implements TimestampAware {
     // implements TelemetryAware
 
     // in Promql this is the __name__ label however for now, this gets mapped to an exact field