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