sql_from_models_parser/dialect/
mssql.rs

1// Licensed under the Apache License, Version 2.0 (the "License");
2// you may not use this file except in compliance with the License.
3// You may obtain a copy of the License at
4//
5// http://www.apache.org/licenses/LICENSE-2.0
6//
7// Unless required by applicable law or agreed to in writing, software
8// distributed under the License is distributed on an "AS IS" BASIS,
9// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
10// See the License for the specific language governing permissions and
11// limitations under the License.
12
13use crate::dialect::Dialect;
14
15#[derive(Debug)]
16pub struct MsSqlDialect {}
17
18impl Dialect for MsSqlDialect {
19    fn is_delimited_identifier_start(&self, ch: char) -> bool {
20        ch == '"' || ch == '['
21    }
22
23    fn is_identifier_start(&self, ch: char) -> bool {
24        // See https://docs.microsoft.com/en-us/sql/relational-databases/databases/database-identifiers?view=sql-server-2017#rules-for-regular-identifiers
25        // We don't support non-latin "letters" currently.
26        ('a'..='z').contains(&ch)
27            || ('A'..='Z').contains(&ch)
28            || ch == '_'
29            || ch == '#'
30            || ch == '@'
31    }
32
33    fn is_identifier_part(&self, ch: char) -> bool {
34        ('a'..='z').contains(&ch)
35            || ('A'..='Z').contains(&ch)
36            || ('0'..='9').contains(&ch)
37            || ch == '@'
38            || ch == '$'
39            || ch == '#'
40            || ch == '_'
41    }
42}