sqlparser/dialect/
hive.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 HiveDialect {}
17
18impl Dialect for HiveDialect {
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        ch.is_ascii_lowercase() || ch.is_ascii_uppercase() || ch.is_ascii_digit() || ch == '$'
25    }
26
27    fn is_identifier_part(&self, ch: char) -> bool {
28        ch.is_ascii_lowercase()
29            || ch.is_ascii_uppercase()
30            || ch.is_ascii_digit()
31            || ch == '_'
32            || ch == '$'
33            || ch == '{'
34            || ch == '}'
35    }
36
37    fn supports_filter_during_aggregation(&self) -> bool {
38        true
39    }
40}