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系统所在竖井

jxing 5 年之前
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  1. 46 0
      datacenter/docs/relation_calc/Sy2Sh.md

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datacenter/docs/relation_calc/Sy2Sh.md

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+系统所在竖井
+## 前置条件
+    1. 系统下有设备
+    2. 系统下的设备有所在竖井关系
+## 计算流程
+    1. 根据 系统 --> 设备 --> 竖井 来间接获取系统所属竖井关系
+    2. 计算后的关系存储在表 r_sy_in_sh
+## 函数
+```
+-- 系统所在竖井
+create or replace function public.rel_sy2sh(project_id character varying) returns boolean
+as
+$$
+try:
+    # 将下面对数据库的操作作为一个事务, 出异常则自动rollback
+    with plpy.subtransaction():
+        delete_plan = plpy.prepare("delete from r_sy_in_sh where project_id = $1 and sign = 2", ["text"])
+        delete_plan.execute([project_id])
+        join_plan = plpy.prepare("select sy.sys_id, rel.shaft_id from r_sy_eq sy inner join r_eq_in_sh rel on sy.equip_id = rel.equip_id where rel.project_id = $1 and sy.project_id = $1", ["text"])
+        rel = join_plan.execute([project_id])
+        sy2sh = dict()
+        for row in rel:
+            sys = row['sys_id']
+            shaft = row['shaft_id']
+            if sys not in sy2sh:
+                sy2sh[sys] = set()
+            shaft_set = sy2sh[sys]
+            shaft_set.add(shaft)
+        for sid, shaft_set in sy2sh.items():
+            for shaft in shaft_set:
+                plan = plpy.prepare("insert into r_sy_in_sh(sys_id, shaft_id, project_id, sign) values($1, $2, $3, 2)", ["text", "text", "text"])
+                plan.execute([sid, shaft, project_id])
+except Exception as e:
+    plpy.warning(e)
+    return False
+else:
+    return True
+$$
+LANGUAGE 'plpython3u' VOLATILE;
+```
+
+## 输入
+    1. 项目id
+
+## 例子
+    select public.rel_sy2sh('Pj1101010015');