sqlparser/dialect/
clickhouse.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// A [`Dialect`] for [ClickHouse](https://clickhouse.com/).
16#[derive(Debug)]
17pub struct ClickHouseDialect {}
18
19impl Dialect for ClickHouseDialect {
20    fn is_identifier_start(&self, ch: char) -> bool {
21        // See https://clickhouse.com/docs/en/sql-reference/syntax/#syntax-identifiers
22        ch.is_ascii_lowercase() || ch.is_ascii_uppercase() || ch == '_'
23    }
24
25    fn is_identifier_part(&self, ch: char) -> bool {
26        self.is_identifier_start(ch) || ch.is_ascii_digit()
27    }
28}