sqlite3-parser 0.5.0

SQL parser (as understood by SQLite)
Documentation 
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

use fallible_iterator::FallibleIterator;

use super::{Error, Parser};
use crate::parser::ast::{ParameterInfo, ToTokens};

#[test]
fn count_placeholders() {
    let sql = "SELECT ? WHERE 1 = ?";
    let mut parser = Parser::new(sql.as_bytes());
    let ast = parser.next().unwrap().unwrap();
    let mut info = ParameterInfo::default();
    ast.to_tokens(&mut info).unwrap();
    assert_eq!(info.count, 2);
}

#[test]
fn count_numbered_placeholders() {
    let sql = "SELECT ?1 WHERE 1 = ?2 AND 0 = ?1";
    let mut parser = Parser::new(sql.as_bytes());
    let ast = parser.next().unwrap().unwrap();
    let mut info = ParameterInfo::default();
    ast.to_tokens(&mut info).unwrap();
    assert_eq!(info.count, 2);
}

#[test]
fn count_unused_placeholders() {
    let sql = "SELECT ?1 WHERE 1 = ?3";
    let mut parser = Parser::new(sql.as_bytes());
    let ast = parser.next().unwrap().unwrap();
    let mut info = ParameterInfo::default();
    ast.to_tokens(&mut info).unwrap();
    assert_eq!(info.count, 3);
}

#[test]
fn count_named_placeholders() {
    let sql = "SELECT :x, :y WHERE 1 = :y";
    let mut parser = Parser::new(sql.as_bytes());
    let ast = parser.next().unwrap().unwrap();
    let mut info = ParameterInfo::default();
    ast.to_tokens(&mut info).unwrap();
    assert_eq!(info.count, 2);
    assert_eq!(info.names.len(), 2);
    assert!(info.names.contains(":x"));
    assert!(info.names.contains(":y"));
}

#[test]
fn duplicate_column() {
    let sql = "CREATE TABLE t (x TEXT, x TEXT)";
    let mut parser = Parser::new(sql.as_bytes());
    let r = parser.next();
    if let Error::ParserError(msg, _) = r.unwrap_err() {
        assert!(msg.contains("duplicate column name"));
    }
}