Fix validation

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

@@ -14,8 +14,10 @@
 import org.elasticsearch.xpack.esql.core.expression.Attribute;
 import org.elasticsearch.xpack.esql.core.expression.Expressions;
 import org.elasticsearch.xpack.esql.core.expression.NamedExpression;
+import org.elasticsearch.xpack.esql.core.expression.UnresolvedNamedExpression;
 import org.elasticsearch.xpack.esql.core.tree.NodeInfo;
 import org.elasticsearch.xpack.esql.core.tree.Source;
+import org.elasticsearch.xpack.esql.expression.UnresolvedNamePattern;
 import org.elasticsearch.xpack.esql.expression.function.Functions;
 import org.elasticsearch.xpack.esql.io.stream.PlanStreamInput;
 
@@ -39,9 +41,11 @@ public Project(Source source, LogicalPlan child, List<? extends NamedExpression>
 
  private boolean validateProjections(List<? extends NamedExpression> projections) {
  for (NamedExpression ne: projections) {
- if (ne instanceof Alias as && (as.child() instanceof Attribute == false)) {
- return false;
- } else if (ne instanceof Attribute == false) {
+ if (ne instanceof Alias as) {
+ if (as.child() instanceof Attribute == false) {
+ return false;
+ }
+ } else if (ne instanceof Attribute == false && ne instanceof UnresolvedNamedExpression == false) {
  return false;
  }
  }