refactor(doctorstation): 优化医生站医嘱查询SQL逻辑

- 将原有的条件判断逻辑重构为更清晰的choose/when/otherwise结构
- 修复了adviceTypes参数为空或未指定时的SQL执行问题
- 通过trim标签处理UNION ALL连接避免多余关键字
- 添加otherwise分支确保无adviceTypes时返回正确空结果集
- 保持了原有的所有功能逻辑和数据映射关系不变
- 提高了SQL查询的可读性和维护性

openhis-server-new/openhis-application/src/main/resources/mapper/doctorstation/DoctorStationAdviceAppMapper.xml

@@ -43,8 +43,11 @@
         abi.restricted_scope,
         abi.dosage_instruction,
         abi.chrgitm_lv
-        from (
+        FROM (
-        <if test="adviceTypes == null or adviceTypes.contains(1)">
+        <choose>
+            <when test="adviceTypes != null and !adviceTypes.isEmpty()">
+                <trim prefixOverrides="UNION ALL">
+                    <if test="adviceTypes.contains(1)">
                         (SELECT
                         DISTINCT ON (T1.ID)
                         T1.tenant_id,
@@ -112,12 +115,8 @@
                         )
                     </if>
 
-
+                    <if test="adviceTypes.contains(2)">
-        <if test="adviceTypes == null or adviceTypes.contains(1)">
+                        UNION ALL
-            <if test="adviceTypes == null or adviceTypes.contains(2) or adviceTypes.contains(3)">UNION ALL</if>
-        </if>
-
-        <if test="adviceTypes == null or adviceTypes.contains(2)">
                         (SELECT
                         DISTINCT ON (T1.ID)
                         T1.tenant_id,
@@ -179,12 +178,8 @@
                         )
                     </if>
 
-
+                    <if test="adviceTypes.contains(3)">
-        <if test="adviceTypes == null or adviceTypes.contains(2)">
+                        UNION ALL
-            <if test="adviceTypes == null or adviceTypes.contains(3)">UNION ALL</if>
-        </if>
-
-        <if test="adviceTypes == null or adviceTypes.contains(3)">
                         (SELECT
                         DISTINCT ON (T1.ID)
                         T1.tenant_id,
@@ -245,6 +240,52 @@
                         AND T1.status_enum = #{statusEnum}
                         )
                     </if>
+                </trim>
+            </when>
+            <otherwise>
+                -- 当没有指定adviceTypes或adviceTypes为空时，返回空结果集但保持正确的SQL语法
+                SELECT
+                    NULL::varchar AS tenant_id,
+                    NULL::integer AS advice_type,
+                    NULL::varchar AS bus_no,
+                    NULL::varchar AS category_code,
+                    NULL::varchar AS pharmacology_category_code,
+                    NULL::numeric AS part_percent,
+                    NULL::numeric AS unit_conversion_ratio,
+                    NULL::integer AS part_attribute_enum,
+                    NULL::integer AS tho_part_attribute_enum,
+                    NULL::integer AS skin_test_flag,
+                    NULL::integer AS inject_flag,
+                    NULL::bigint AS advice_definition_id,
+                    NULL::varchar AS advice_name,
+                    NULL::varchar AS advice_bus_no,
+                    NULL::varchar AS py_str,
+                    NULL::varchar AS wb_str,
+                    NULL::varchar AS yb_no,
+                    NULL::varchar AS product_name,
+                    NULL::integer AS activity_type,
+                    NULL::varchar AS unit_code,
+                    NULL::varchar AS min_unit_code,
+                    NULL::numeric AS volume,
+                    NULL::varchar AS method_code,
+                    NULL::varchar AS rate_code,
+                    NULL::bigint AS org_id,
+                    NULL::bigint AS location_id,
+                    NULL::varchar AS dose,
+                    NULL::varchar AS dose_unit_code,
+                    NULL::varchar AS supplier,
+                    NULL::bigint AS supplier_id,
+                    NULL::varchar AS manufacturer,
+                    NULL::bigint AS charge_item_definition_id,
+                    NULL::varchar AS advice_table_name,
+                    NULL::bigint AS position_id,
+                    NULL::integer AS restricted_flag,
+                    NULL::varchar AS restricted_scope,
+                    NULL::varchar AS dosage_instruction,
+                    NULL::integer AS chrgitm_lv
+                WHERE 1 = 0  -- 确保不返回任何行
+            </otherwise>
+        </choose>
         ) AS abi
         ${ew.customSqlSegment}
     </select>