[fix](update null map) Fix update_null_map #38787#38921

zhiqiang-hhhh wants to merge 1 commit intoapache:branch-2.0apache/doris:branch-2.0from

zhiqiang-hhhh:pick_38787_to_upstream_branch-2.0zhiqiang-hhhh/doris:pick_38787_to_upstream_branch-2.0Copy head branch name to clipboard