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skill_tree_pg
提交 92a0b9a1 编写于 作者: M Mars Liu
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data/2.PostgreSQL中阶/1.基本结构/5. 触发器/audit.json 0 → 100644
浏览文件 @ 92a0b9a1
{
"type": "code_options",
"author": "ccat",
"source": "audit.md",
"notebook_enable": false,
"exercise_id": "47ab9b38b16d48ca9a4abd637dfe39b3"
}
\ No newline at end of file
data/2.PostgreSQL中阶/1.基本结构/5. 触发器/audit.md 0 → 100644
浏览文件 @ 92a0b9a1
# 交易审计
Orders 表
```postgresql
create table orders
(
id serial primary key,
item_id int,
amount int,
unit_price money,
total money,
description text,
ts timestamp default now()
);
```
记录了未完成的订单。审计部门现在需要记录其变更——新增或删除,该表不会发生update——即将修改都记录到 orders_log 表
```postgresql
create table orders_log
(
log_id serial primary key,
id int,
item_id int,
amount int,
unit_price money,
total money,
description text,
ts timestamp,
direction varchar(16),
log_at timestamp default now()
);
```
那么应该如何做？
## 答案
```postgresql
create or replace function log_order_in() returns trigger as $$
begin
insert into orders_log(id, item_id, amount, unit_price, total, description, ts, direction)
values(NEW.id, NEW.item_id, NEW.amount, NEW.unit_price, NEW.total, NEW.description, NEW.ts, 'in');
return NEW;
end
$$ language plpgsql;
create or replace function log_order_out() returns trigger as $$
begin
insert into orders_log(id, item_id, amount, unit_price, total, description, ts, direction)
values(OLD.id, OLD.item_id, OLD.amount, OLD.unit_price, OLD.total, OLD.description, OLD.ts, 'out');
return OLD;
end
$$ language plpgsql;
create trigger in_orders after insert on orders
for each row execute function log_order_in();
create trigger out_orders after delete on orders
for each row execute function log_order_out();
```
## 选项
### A
```postgresql
create trigger in_orders after insert on orders
for each row insert into orders_log(id, item_id, amount, unit_price, total, description, ts, direction)
values(NEW.id, NEW.item_id, NEW.amount, NEW.unit_price, NEW.total, NEW.description, NEW.ts, 'in');
```
### B
```postgresql
create trigger out_orders after delete on orders
for each row insert into orders_log(id, item_id, amount, unit_price, total, description, ts, direction)
values(OLD.id, OLD.item_id, OLD.amount, OLD.unit_price, OLD.total, OLD.description, OLD.ts, 'out');
```
### C
```postgresql
create trigger in_orders after insert on orders
for each row insert into orders_log(id, item_id, amount, unit_price, total, description, ts, direction)
values(NEW.id, NEW.item_id, NEW.amount, NEW.unit_price, NEW.total, NEW.description, NEW.ts, 'in');
after delete on orders
for each row insert into orders_log(id, item_id, amount, unit_price, total, description, ts, direction)
values(OLD.id, OLD.item_id, OLD.amount, OLD.unit_price, OLD.total, OLD.description, OLD.ts, 'out');
```
### D
```postgresql
create trigger in_orders after insert, after delete on orders
for each row insert into orders_log(id, item_id, amount, unit_price, total, description, ts, direction)
values(NEW.id, NEW.item_id, NEW.amount, NEW.unit_price, NEW.total, NEW.description, NEW.ts, 'in');
```
\ No newline at end of file
data/2.PostgreSQL中阶/1.基本结构/5. 触发器/config.json
浏览文件 @ 92a0b9a1
...@@ -6,7 +6,8 @@ ...@@ -6,7 +6,8 @@
], ],
"children": [], "children": [],
"export": [ "export": [
"trigger.json" "trigger.json",
"audit.json"
], ],
"keywords_must": [ "keywords_must": [
"trigger", "trigger",
......
data/tree.json
浏览文件 @ 92a0b9a1
...@@ -29,7 +29,8 @@ ...@@ -29,7 +29,8 @@
"relational", "relational",
"rdbms" "rdbms"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -46,12 +47,14 @@ ...@@ -46,12 +47,14 @@
"服务器", "服务器",
"客户端" "客户端"
], ],
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"group": 0
} }
} }
], ],
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"group": 0
} }
}, },
{ {
...@@ -70,7 +73,8 @@ ...@@ -70,7 +73,8 @@
"keywords_must": [ "keywords_must": [
"安装" "安装"
], ],
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"group": 0
} }
}, },
{ {
...@@ -85,7 +89,8 @@ ...@@ -85,7 +89,8 @@
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"登录" "登录"
], ],
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"group": 0
} }
}, },
{ {
...@@ -101,12 +106,14 @@ ...@@ -101,12 +106,14 @@
"基本用法", "基本用法",
"入门" "入门"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
} }
], ],
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} }
}, },
{ {
...@@ -126,7 +133,8 @@ ...@@ -126,7 +133,8 @@
"keywords_must": [ "keywords_must": [
"psql" "psql"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -141,7 +149,8 @@ ...@@ -141,7 +149,8 @@
"语法", "语法",
"SQL" "SQL"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -161,17 +170,20 @@ ...@@ -161,17 +170,20 @@
"update", "update",
"delete" "delete"
], ],
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"group": 0
} }
} }
], ],
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"group": 0
} }
}, },
{ {
...@@ -196,7 +208,8 @@ ...@@ -196,7 +208,8 @@
"表", "表",
"table" "table"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -211,7 +224,8 @@ ...@@ -211,7 +224,8 @@
"函数", "函数",
"function" "function"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -236,7 +250,8 @@ ...@@ -236,7 +250,8 @@
"权限", "权限",
"privilege" "privilege"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -255,7 +270,8 @@ ...@@ -255,7 +270,8 @@
"constraints", "constraints",
"index" "index"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -270,7 +286,8 @@ ...@@ -270,7 +286,8 @@
"trigger", "trigger",
"触发器" "触发器"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -286,12 +303,14 @@ ...@@ -286,12 +303,14 @@
"数据库扩展", "数据库扩展",
"extension" "extension"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
} }
], ],
"keywords_must": [], "keywords_must": [],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -312,7 +331,8 @@ ...@@ -312,7 +331,8 @@
"分组", "分组",
"聚合" "聚合"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -327,7 +347,8 @@ ...@@ -327,7 +347,8 @@
"join", "join",
"连接查询" "连接查询"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -342,7 +363,8 @@ ...@@ -342,7 +363,8 @@
"子查询", "子查询",
"subquery" "subquery"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -359,7 +381,8 @@ ...@@ -359,7 +381,8 @@
"limit", "limit",
"offset" "offset"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -374,7 +397,8 @@ ...@@ -374,7 +397,8 @@
"keywords_must": [ "keywords_must": [
"cte" "cte"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -388,7 +412,8 @@ ...@@ -388,7 +412,8 @@
"keywords_must": [ "keywords_must": [
"过程化" "过程化"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -405,17 +430,20 @@ ...@@ -405,17 +430,20 @@
"授权", "授权",
"ddl" "ddl"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
} }
], ],
"keywords_must": [], "keywords_must": [],
"keywords_forbid": [] "keywords_forbid": [],
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} }
} }
], ],
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"group": 0
} }
}, },
{ {
...@@ -441,7 +469,8 @@ ...@@ -441,7 +469,8 @@
"keywords_must": [ "keywords_must": [
"standby" "standby"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -458,7 +487,8 @@ ...@@ -458,7 +487,8 @@
"流式复制", "流式复制",
"流复制" "流复制"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -473,12 +503,14 @@ ...@@ -473,12 +503,14 @@
"外部数据连接", "外部数据连接",
"fdw" "fdw"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
} }
], ],
"keywords_must": [], "keywords_must": [],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -498,7 +530,8 @@ ...@@ -498,7 +530,8 @@
"gis", "gis",
"几何" "几何"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -513,7 +546,8 @@ ...@@ -513,7 +546,8 @@
"json", "json",
"jsonb" "jsonb"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -535,7 +569,8 @@ ...@@ -535,7 +569,8 @@
], ],
"" ""
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -550,12 +585,14 @@ ...@@ -550,12 +585,14 @@
"视图", "视图",
"view" "view"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
} }
], ],
"keywords_must": [], "keywords_must": [],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -577,7 +614,8 @@ ...@@ -577,7 +614,8 @@
"递归查询", "递归查询",
"recursive" "recursive"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -593,7 +631,8 @@ ...@@ -593,7 +631,8 @@
"function", "function",
"window" "window"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -610,7 +649,8 @@ ...@@ -610,7 +649,8 @@
"交叉透视表", "交叉透视表",
"pivot" "pivot"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -626,7 +666,8 @@ ...@@ -626,7 +666,8 @@
"conflict", "conflict",
"冲突" "冲突"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -641,7 +682,8 @@ ...@@ -641,7 +682,8 @@
"事务", "事务",
"transaction" "transaction"
], ],
"keywords_forbid": [] "keywords_forbid": [],
"group": 0
} }
}, },
{ {
...@@ -660,12 +702,14 @@ ...@@ -660,12 +702,14 @@
"performance", "performance",
"优化" "优化"
], ],
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} }
} }
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{ {
...@@ -683,21 +727,25 @@ ...@@ -683,21 +727,25 @@
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"数据库问答" "数据库问答"
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} }
} }
\ No newline at end of file
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