sqlparser/dialect/
hive.rs

1// Licensed to the Apache Software Foundation (ASF) under one
2// or more contributor license agreements.  See the NOTICE file
3// distributed with this work for additional information
4// regarding copyright ownership.  The ASF licenses this file
5// to you under the Apache License, Version 2.0 (the
6// "License"); you may not use this file except in compliance
7// with the License.  You may obtain a copy of the License at
8//
9//   http://www.apache.org/licenses/LICENSE-2.0
10//
11// Unless required by applicable law or agreed to in writing,
12// software distributed under the License is distributed on an
13// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
14// KIND, either express or implied.  See the License for the
15// specific language governing permissions and limitations
16// under the License.
17
18use crate::dialect::Dialect;
19
20/// A [`Dialect`] for [Hive](https://hive.apache.org/).
21#[derive(Debug)]
22pub struct HiveDialect {}
23
24impl Dialect for HiveDialect {
25    fn is_delimited_identifier_start(&self, ch: char) -> bool {
26        (ch == '"') || (ch == '`')
27    }
28
29    fn is_identifier_start(&self, ch: char) -> bool {
30        ch.is_ascii_lowercase() || ch.is_ascii_uppercase() || ch.is_ascii_digit() || ch == '$'
31    }
32
33    fn is_identifier_part(&self, ch: char) -> bool {
34        ch.is_ascii_lowercase()
35            || ch.is_ascii_uppercase()
36            || ch.is_ascii_digit()
37            || ch == '_'
38            || ch == '$'
39            || ch == '{'
40            || ch == '}'
41    }
42
43    fn supports_filter_during_aggregation(&self) -> bool {
44        true
45    }
46
47    fn supports_numeric_prefix(&self) -> bool {
48        true
49    }
50
51    fn require_interval_qualifier(&self) -> bool {
52        true
53    }
54
55    /// See <https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=27362061#Tutorial-BuiltInOperators>
56    fn supports_bang_not_operator(&self) -> bool {
57        true
58    }
59
60    /// See <https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=27362036#LanguageManualDML-Loadingfilesintotables>
61    fn supports_load_data(&self) -> bool {
62        true
63    }
64
65    /// See <https://cwiki.apache.org/confluence/display/hive/languagemanual+sampling>
66    fn supports_table_sample_before_alias(&self) -> bool {
67        true
68    }
69
70    /// See <https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=30151323#EnhancedAggregation,Cube,GroupingandRollup-CubesandRollupsr>
71    fn supports_group_by_with_modifier(&self) -> bool {
72        true
73    }
74}
sqlparser/dialect/hive.rs

sqlparser/dialect/
hive.rs
