From 62cb1f149ff14c8c0b4e3f821616963179ef67a7 Mon Sep 17 00:00:00 2001
From: Aleksey Koshelev <a.koshelev@arenadata.io>
Date: Mon, 17 Aug 2026 16:54:53 +0400
Subject: [PATCH] ADH-8584: Catch nullable fieldSchemas field in TableSchema

---
 service/src/java/org/apache/hive/service/cli/TableSchema.java | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/service/src/java/org/apache/hive/service/cli/TableSchema.java b/service/src/java/org/apache/hive/service/cli/TableSchema.java
index d8812181f835..a80ecd5173b7 100644
--- a/service/src/java/org/apache/hive/service/cli/TableSchema.java
+++ b/service/src/java/org/apache/hive/service/cli/TableSchema.java
@@ -49,6 +49,9 @@ public TableSchema(TTableSchema tTableSchema) {
 
   public TableSchema(List<FieldSchema> fieldSchemas) {
     int pos = 1;
+    if (fieldSchemas == null) {
+      return;
+    }
     for (FieldSchema field : fieldSchemas) {
       columns.add(new ColumnDescriptor(field.getName(), field.getComment(), new TypeDescriptor(
           field.getType()), pos++));
@@ -78,6 +81,7 @@ public void clear() {
 
   public TTableSchema toTTableSchema() {
     TTableSchema tTableSchema = new TTableSchema();
+    tTableSchema.setColumns(new ArrayList<>());
     for (ColumnDescriptor col : columns) {
       tTableSchema.addToColumns(col.toTColumnDesc());
     }