From 1d6ef8d0c4494e2915f4dab763510ba234bfb5f4 Mon Sep 17 00:00:00 2001
From: TengJianPing <18241664+jacktengg@users.noreply.github.com>
Date: Mon, 25 Dec 2023 22:19:01 +0800
Subject: [PATCH] [fix](hash join) fix column ref DCHECK failure of hash join
 node block mem reuse (#28991)

Introduced by #28851, after evaluating build side expr, some columns in resulting block may be referenced more than once in the same block.

e.g. coalesce(col_a, 'string') if col_a is nullable but actually contains no null values, in this case funcition coalesce will insert a new nullable column which references the original col_a.
---
 be/src/vec/exec/join/vhash_join_node.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/be/src/vec/exec/join/vhash_join_node.cpp b/be/src/vec/exec/join/vhash_join_node.cpp
index 30f2450f458c11a..60391716e28af66 100644
--- a/be/src/vec/exec/join/vhash_join_node.cpp
+++ b/be/src/vec/exec/join/vhash_join_node.cpp
@@ -692,7 +692,7 @@ Status HashJoinNode::_materialize_build_side(RuntimeState* state) {
         // data from data.
         while (!eos && (!_short_circuit_for_null_in_build_side || !_has_null_in_build_side) &&
                (!_probe_open_finish || !_is_hash_join_early_start_probe_eos(state))) {
-            block.clear_column_data();
+            release_block_memory(block, 1);
             RETURN_IF_CANCELLED(state);
             {
                 SCOPED_TIMER(_build_get_next_timer);