fix parameter expression in lookup statement

src/graph/validator/LookupValidator.cpp

@@ -442,7 +442,7 @@ StatusOr<Expression*> LookupValidator::checkConstExpr(Expression* expr,
   if (type == nebula::cpp2::PropertyType::UNKNOWN) {
     return Status::SemanticError("Invalid column: %s", prop.c_str());
   }
-  QueryExpressionContext dummy(nullptr);
+  QueryExpressionContext dummy(qctx_->ectx());
   auto v = Expression::eval(expr, dummy);
   // TODO(Aiee) extract the type cast logic as a method if we decide to support
   // more cross-type comparisons.

tests/tck/features/yield/parameter.feature

@@ -98,6 +98,19 @@ Feature: Parameter
       | "Tim Duncan" |
 
   Scenario: ngql with parameters
+    When executing query:
+      """
+      LOOKUP ON player where player.age>$p1+40 YIELD player.name AS name
+      """
+    Then the result should be, in any order:
+      | name              |
+      | "Grant Hill"      |
+      | "Jason Kidd"      |
+      | "Vince Carter"    |
+      | "Tim Duncan"      |
+      | "Shaquile O'Neal" |
+      | "Steve Nash"      |
+      | "Ray Allen"       |
     When executing query:
       """
       $p1=GO FROM "Tim Duncan" OVER like WHERE like.likeness>$p1 yield like._dst as dst;