From fc5ac3c34683da240aca183bac7bcd1df483ccd0 Mon Sep 17 00:00:00 2001
From: jackwener <jakevingoo@gmail.com>
Date: Thu, 20 Apr 2023 19:02:13 +0800
Subject: [PATCH] [feat](Nereids): validate Project list.

---
 .../org/apache/doris/nereids/processor/post/Validator.java    | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/processor/post/Validator.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/processor/post/Validator.java
index 2f866559968188..ea24e0183b1dff 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/processor/post/Validator.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/processor/post/Validator.java
@@ -42,6 +42,8 @@ public class Validator extends PlanPostProcessor {
 
     @Override
     public Plan visitPhysicalProject(PhysicalProject<? extends Plan> project, CascadesContext context) {
+        Preconditions.checkArgument(!project.getProjects().isEmpty(), "Project list can't be empty");
+
         Plan child = project.child();
         // Forbidden project-project, we must merge project.
         if (child instanceof PhysicalProject) {
@@ -54,7 +56,7 @@ public Plan visitPhysicalProject(PhysicalProject<? extends Plan> project, Cascad
     @Override
     public Plan visitPhysicalFilter(PhysicalFilter<? extends Plan> filter, CascadesContext context) {
         Preconditions.checkArgument(!filter.getConjuncts().isEmpty()
-                && filter.getPredicate() != BooleanLiteral.TRUE);
+                && filter.getPredicate() != BooleanLiteral.TRUE, "Filter predicate can't be empty or true");
 
         Plan child = filter.child();
         // Forbidden filter-project, we must make filter-project -> project-filter.