From 222aa709ecf3f75835cd18dc66538dd36334c1cc Mon Sep 17 00:00:00 2001
From: yang chen <yangchenjj@isoftstone.com>
Date: Thu, 30 Oct 2025 15:24:30 +0800
Subject: [PATCH] =?UTF-8?q?feat(database):=E4=B8=BABPM=E6=B5=81=E7=A8=8B?=
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- 新增ASSIGNEE字段用于存储流程处理人信息
- 添加达梦数据库字段存在性检查逻辑
- 实现字段重复添加保护机制- 提供字段添加成功与已存在两种提示信息
- 使用PL/SQL块确保脚本执行安全性
---
 .../20251030/bpm_process_instance_ext.sql     | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 SQL/202510/20251030/bpm_process_instance_ext.sql

diff --git a/SQL/202510/20251030/bpm_process_instance_ext.sql b/SQL/202510/20251030/bpm_process_instance_ext.sql
new file mode 100644
index 0000000..91de5ef
--- /dev/null
+++ b/SQL/202510/20251030/bpm_process_instance_ext.sql
@@ -0,0 +1,22 @@
+-- 达梦数据库新增字段脚本
+-- 功能：为表BPM_PROCESS_INSTANCE_EXT新增ASSIGNEE字段
+
+-- 检查字段是否已存在
+DECLARE
+    v_column_count NUMBER;
+BEGIN
+    -- 查询系统表检查字段是否存在
+    SELECT COUNT(*) INTO v_column_count
+    FROM ALL_TAB_COLUMNS
+    WHERE TABLE_NAME = 'BPM_PROCESS_INSTANCE_EXT'
+      AND COLUMN_NAME = 'ASSIGNEE';
+
+    -- 如果字段不存在，则执行添加操作
+    IF v_column_count = 0 THEN
+        EXECUTE IMMEDIATE 'ALTER TABLE BPM_PROCESS_INSTANCE_EXT ADD ASSIGNEE TEXT';
+        DBMS_OUTPUT.PUT_LINE('字段ASSIGNEE添加成功');
+    ELSE
+        DBMS_OUTPUT.PUT_LINE('字段ASSIGNEE已存在，无需重复添加');
+    END IF;
+END;
+/
\ No newline at end of file