fix sql-tester

Signed-off-by: gengjun-git <gengjun@starrocks.com>

Author: gengjun-git

fe/fe-core/src/main/java/com/starrocks/qe/StmtExecutor.java

@@ -3407,6 +3407,13 @@ public void handleDMLStmt(ExecPlan execPlan, DmlStmt stmt) throws Exception {
                     LOG.warn("errors when cancel insert load job {}", jobId);
                 }
             } else if (txnState != null) {
+                // Re-fetch txnState after commit because the COW pattern in DatabaseTransactionMgr
+                // replaces the in-memory state with a deep copy, making the original reference stale.
+                TransactionState freshTxnState = transactionMgr.getTransactionState(
+                        database.getId(), transactionId);
+                if (freshTxnState != null) {
+                    txnState = freshTxnState;
+                }
                 GlobalStateMgr.getCurrentState().getOperationListenerBus()
                         .onDMLStmtJobTransactionFinish(txnState, database, targetTable, dmlType);
             }

fe/fe-core/src/main/java/com/starrocks/transaction/TransactionStmtExecutor.java

@@ -294,6 +294,13 @@ public static void commitStmt(ConnectContext context, CommitStmt stmt) {
                     txnCommitAttachment,
                     timeout);
 
+            // Re-fetch transactionState after commit because the COW pattern in DatabaseTransactionMgr
+            // replaces the in-memory state with a deep copy, making the original reference stale.
+            TransactionState freshTxnState = transactionMgr.getTransactionState(databaseId, transactionId);
+            if (freshTxnState != null) {
+                transactionState = freshTxnState;
+            }
+
             long publishWaitMs = Config.enable_sync_publish ? jobDeadLineMs - System.currentTimeMillis() :
                     context.getSessionVariable().getTransactionVisibleWaitTimeout() * 1000;