1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
use sqlparser::{ast::*, dialect::PostgreSqlDialect, parser::Parser};
pub fn parse_sql(sql: &str) -> (String, String) {
match Parser::parse_sql(&PostgreSqlDialect {}, sql.to_string()) {
Ok(ast) => {
for x in ast {
match x {
Statement::Query(query) => {
match query.body {
SetExpr::Select(select) => {
let mut table_name = vec![];
for x in select.from {
table_name.push(x.relation.to_string());
for join in x.joins {
table_name.push(join.relation.to_string());
}
}
return ("select".to_string(), table_name.join(", "));
}
_ => return (sql.to_string(), "".to_string()),
};
}
Statement::Update { table_name, .. } => {
return ("update".to_string(), table_name.to_string());
}
Statement::Insert { table_name, .. } => {
return ("insert".to_string(), table_name.to_string());
}
Statement::Copy { table_name, .. } => {
return ("copy".to_string(), table_name.to_string());
}
Statement::Delete { table_name, .. } => {
return ("delete".to_string(), table_name.to_string());
}
Statement::CreateView { name, .. } => {
return ("create view".to_string(), name.to_string());
}
Statement::CreateTable { name, .. } => {
return ("create table".to_string(), name.to_string());
}
Statement::AlterTable { name, .. } => {
return ("alter".to_string(), name.to_string());
}
Statement::Drop { names, .. } => {
return (
"drop".to_string(),
names
.iter()
.map(|x| x.to_string())
.collect::<Vec<String>>()
.join(", "),
);
}
_ => {
return (sql.to_string(), "".to_string());
}
}
}
}
Err(_err) => {
return (sql.to_string(), "".to_string());
}
};
(sql.to_string(), "".to_string())
}
#[cfg(test)]
mod tests {
use super::parse_sql;
#[test]
fn parse_test() {
assert_eq!(
parse_sql("select abc from employee, abc1 where name = asgief"),
("select".to_string(), "employee, abc1".to_string())
);
assert_eq!(
parse_sql("select * from supplier join orders on supplier.id=orders.id;"),
("select".to_string(), "supplier, orders".to_string())
);
assert_eq!(
parse_sql(
r#"
SELECT customer.customer_id FROM customer
INNER JOIN payment ON payment.customer_id = customer.customer_id
INNER JOIN payment1 ON payment1.customer_id = customer.customer_id;
"#
),
(
"select".to_string(),
"customer, payment, payment1".to_string()
)
);
assert_eq!(
parse_sql("update employee set name = asgief"),
("update".to_string(), "employee".to_string())
);
assert_eq!(
parse_sql("insert into employee(id, name) values(1, 23)"),
("insert".to_string(), "employee".to_string())
);
assert_eq!(
parse_sql("delete from employee where name = asgief"),
("delete".to_string(), "employee".to_string())
);
assert_eq!(
parse_sql(
r#"
CREATE TABLE account(
user_id serial PRIMARY KEY,
username VARCHAR (50) UNIQUE NOT NULL,
password VARCHAR (50) NOT NULL,
email VARCHAR (355) UNIQUE NOT NULL,
created_on TIMESTAMP NOT NULL,
last_login TIMESTAMP);
"#
),
("create table".to_string(), "account".to_string())
);
assert_eq!(
parse_sql("drop table employee, employee1;"),
("drop".to_string(), "employee, employee1".to_string())
);
}
}