ansi.rs

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use crate::dialect::{Dialect, DialectFlags};

/// A [`Dialect`] for [ANSI SQL](https://en.wikipedia.org/wiki/SQL:2011).
#[derive(Debug)]
pub struct AnsiDialect(DialectFlags);

impl Default for AnsiDialect {
    fn default() -> Self {
        Self(DialectFlags {
            require_interval_qualifier: true,
            ..Default::default()
        })
    }
}

impl Dialect for AnsiDialect {
    fn flags(&self) -> &DialectFlags {
        &self.0
    }

    fn is_identifier_start(&self, ch: char) -> bool {
        ch.is_ascii_lowercase() || ch.is_ascii_uppercase()
    }

    fn is_identifier_part(&self, ch: char) -> bool {
        ch.is_ascii_lowercase() || ch.is_ascii_uppercase() || ch.is_ascii_digit() || ch == '_'
    }
}