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

use pg::Pg;
use query_builder::locking_clause::{
    ForKeyShare, ForNoKeyUpdate, ForShare, ForUpdate, NoModifier, NoWait, SkipLocked,
};
use query_builder::{AstPass, QueryFragment};
use result::QueryResult;

impl QueryFragment<Pg> for ForUpdate {
    fn walk_ast(&self, mut out: AstPass<Pg>) -> QueryResult<()> {
        out.push_sql(" FOR UPDATE");
        Ok(())
    }
}

impl QueryFragment<Pg> for ForNoKeyUpdate {
    fn walk_ast(&self, mut out: AstPass<Pg>) -> QueryResult<()> {
        out.push_sql(" FOR NO KEY UPDATE");
        Ok(())
    }
}

impl QueryFragment<Pg> for ForShare {
    fn walk_ast(&self, mut out: AstPass<Pg>) -> QueryResult<()> {
        out.push_sql(" FOR SHARE");
        Ok(())
    }
}

impl QueryFragment<Pg> for ForKeyShare {
    fn walk_ast(&self, mut out: AstPass<Pg>) -> QueryResult<()> {
        out.push_sql(" FOR KEY SHARE");
        Ok(())
    }
}

impl QueryFragment<Pg> for NoModifier {
    fn walk_ast(&self, _out: AstPass<Pg>) -> QueryResult<()> {
        Ok(())
    }
}

impl QueryFragment<Pg> for SkipLocked {
    fn walk_ast(&self, mut out: AstPass<Pg>) -> QueryResult<()> {
        out.push_sql(" SKIP LOCKED");
        Ok(())
    }
}

impl QueryFragment<Pg> for NoWait {
    fn walk_ast(&self, mut out: AstPass<Pg>) -> QueryResult<()> {
        out.push_sql(" NOWAIT");
        Ok(())
    }
}