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, Default, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]
22#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
23pub struct HiveDialect {}
24
25impl Dialect for HiveDialect {
26    fn is_delimited_identifier_start(&self, ch: char) -> bool {
27        (ch == '"') || (ch == '`')
28    }
29
30    /// See <https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL#LanguageManualDDL-RulesforColumnNames>
31    fn identifier_quote_style(&self, _identifier: &str) -> Option<char> {
32        Some('`')
33    }
34
35    fn is_identifier_start(&self, ch: char) -> bool {
36        ch.is_ascii_lowercase() || ch.is_ascii_uppercase() || ch.is_ascii_digit() || ch == '$'
37    }
38
39    fn is_identifier_part(&self, ch: char) -> bool {
40        ch.is_ascii_lowercase()
41            || ch.is_ascii_uppercase()
42            || ch.is_ascii_digit()
43            || ch == '_'
44            || ch == '$'
45            || ch == '{'
46            || ch == '}'
47    }
48
49    fn supports_filter_during_aggregation(&self) -> bool {
50        true
51    }
52
53    fn supports_numeric_prefix(&self) -> bool {
54        true
55    }
56
57    fn require_interval_qualifier(&self) -> bool {
58        true
59    }
60
61    /// See <https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=27362061#Tutorial-BuiltInOperators>
62    fn supports_bang_not_operator(&self) -> bool {
63        true
64    }
65
66    /// See <https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=27362036#LanguageManualDML-Loadingfilesintotables>
67    fn supports_load_data(&self) -> bool {
68        true
69    }
70
71    /// See <https://cwiki.apache.org/confluence/display/hive/languagemanual+sampling>
72    fn supports_table_sample_before_alias(&self) -> bool {
73        true
74    }
75
76    /// See <https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=30151323#EnhancedAggregation,Cube,GroupingandRollup-CubesandRollupsr>
77    fn supports_group_by_with_modifier(&self) -> bool {
78        true
79    }
80
81    // TODO: The parsing of the FROM keyword seems wrong, as it happens within the CTE.
82    // See https://github.com/apache/datafusion-sqlparser-rs/issues/2236 for more details.
83    /// See <https://hive.apache.org/docs/latest/language/common-table-expression/>
84    fn supports_from_first_insert(&self) -> bool {
85        true
86    }
87
88    /// See <https://hive.apache.org/docs/latest/language/languagemanual-types/>
89    fn supports_map_literal_with_angle_brackets(&self) -> bool {
90        true
91    }
92}
sqlparser/dialect/hive.rs

sqlparser/dialect/
hive.rs
