sqlparser/dialect/
mysql.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
13#[cfg(not(feature = "std"))]
14use alloc::boxed::Box;
15
16use crate::{
17    ast::{BinaryOperator, Expr},
18    dialect::Dialect,
19    keywords::Keyword,
20};
21
22/// A [`Dialect`] for [MySQL](https://www.mysql.com/)
23#[derive(Debug)]
24pub struct MySqlDialect {}
25
26impl Dialect for MySqlDialect {
27    fn is_identifier_start(&self, ch: char) -> bool {
28        // See https://dev.mysql.com/doc/refman/8.0/en/identifiers.html.
29        // Identifiers which begin with a digit are recognized while tokenizing numbers,
30        // so they can be distinguished from exponent numeric literals.
31        ch.is_alphabetic()
32            || ch == '_'
33            || ch == '$'
34            || ch == '@'
35            || ('\u{0080}'..='\u{ffff}').contains(&ch)
36    }
37
38    fn is_identifier_part(&self, ch: char) -> bool {
39        self.is_identifier_start(ch) || ch.is_ascii_digit()
40    }
41
42    fn is_delimited_identifier_start(&self, ch: char) -> bool {
43        ch == '`'
44    }
45
46    fn parse_infix(
47        &self,
48        parser: &mut crate::parser::Parser,
49        expr: &crate::ast::Expr,
50        _precedence: u8,
51    ) -> Option<Result<crate::ast::Expr, crate::parser::ParserError>> {
52        // Parse DIV as an operator
53        if parser.parse_keyword(Keyword::DIV) {
54            Some(Ok(Expr::BinaryOp {
55                left: Box::new(expr.clone()),
56                op: BinaryOperator::MyIntegerDivide,
57                right: Box::new(parser.parse_expr().unwrap()),
58            }))
59        } else {
60            None
61        }
62    }
63}
sqlparser/dialect/mysql.rs

sqlparser/dialect/
mysql.rs
