From b4ae55339c75ee7dfd3cd309f672d74342120cdc Mon Sep 17 00:00:00 2001
From: Cai-Yao <729673078@qq.com>
Date: Mon, 6 Jan 2025 16:18:30 +0000
Subject: [PATCH] fix hash join random null hash_val

---
 src/sql/engine/join/ob_hash_join_op.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/sql/engine/join/ob_hash_join_op.cpp b/src/sql/engine/join/ob_hash_join_op.cpp
index 1f0c1040a..ae7d47416 100644
--- a/src/sql/engine/join/ob_hash_join_op.cpp
+++ b/src/sql/engine/join/ob_hash_join_op.cpp
@@ -4428,7 +4428,8 @@ int ObHashJoinOp::calc_hash_value(
     if (skip_null) {
       skipped = true;
     } else {
-      hash_value = null_random_hash_value_++;
+      hash_value = common::murmurhash64A(&null_random_hash_value_, sizeof(int64_t), HASH_SEED);
+      null_random_hash_value_++;
     }
   }
   hash_value = hash_value & ObHashJoinStoredJoinRow::HASH_VAL_MASK;
@@ -4475,7 +4476,8 @@ int ObHashJoinOp::calc_hash_value_batch(const ObIArray<ObExpr*> &join_keys,
         if (need_null_random) {
           if (skip_null) {
           } else {
-            hash_vals[i] = null_random_hash_value_++;
+            hash_vals[i] = common::murmurhash64A(&null_random_hash_value_, sizeof(int64_t), HASH_SEED);
+            null_random_hash_value_++;
             right_selector_[selector_idx++] = i;
           }
         } else {