sqlparser/dialect/
spark.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
18#[cfg(not(feature = "std"))]
19use alloc::boxed::Box;
20
21use crate::ast::{BinaryOperator, Expr};
22use crate::dialect::Dialect;
23use crate::keywords::Keyword;
24use crate::parser::{Parser, ParserError};
25
26/// A [`Dialect`] for [Apache Spark SQL](https://spark.apache.org/docs/latest/sql-ref.html).
27///
28/// See <https://spark.apache.org/docs/latest/sql-ref-syntax.html>.
29#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]
30#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
31pub struct SparkSqlDialect;
32
33impl Dialect for SparkSqlDialect {
34    // See https://spark.apache.org/docs/latest/sql-ref-identifier.html
35    fn is_delimited_identifier_start(&self, ch: char) -> bool {
36        matches!(ch, '`')
37    }
38
39    fn is_identifier_start(&self, ch: char) -> bool {
40        matches!(ch, 'a'..='z' | 'A'..='Z' | '_')
41    }
42
43    fn is_identifier_part(&self, ch: char) -> bool {
44        matches!(ch, 'a'..='z' | 'A'..='Z' | '0'..='9' | '_')
45    }
46
47    /// See <https://spark.apache.org/docs/latest/sql-ref-functions-builtin-agg.html>
48    fn supports_filter_during_aggregation(&self) -> bool {
49        true
50    }
51
52    /// See <https://spark.apache.org/docs/latest/sql-ref-syntax-qry-select-groupby.html>
53    fn supports_group_by_expr(&self) -> bool {
54        true
55    }
56
57    /// See <https://spark.apache.org/docs/latest/sql-ref-syntax-qry-select-groupby.html>
58    fn supports_group_by_with_modifier(&self) -> bool {
59        true
60    }
61
62    /// See <https://spark.apache.org/docs/latest/sql-ref-functions-builtin-higher-order-func.html>
63    fn supports_lambda_functions(&self) -> bool {
64        true
65    }
66
67    /// See <https://spark.apache.org/docs/latest/sql-ref-syntax-qry-select.html>
68    fn supports_select_wildcard_except(&self) -> bool {
69        true
70    }
71
72    /// See <https://spark.apache.org/docs/latest/sql-ref-datatypes.html>
73    fn supports_struct_literal(&self) -> bool {
74        true
75    }
76
77    fn supports_nested_comments(&self) -> bool {
78        true
79    }
80
81    /// See <https://spark.apache.org/docs/latest/sql-ref-syntax-ddl-create-table-datasource.html>
82    fn supports_create_table_using(&self) -> bool {
83        true
84    }
85
86    /// `LONG` is an alias for `BIGINT` in Spark SQL.
87    ///
88    /// See <https://spark.apache.org/docs/latest/sql-ref-datatypes.html>
89    fn supports_long_type_as_bigint(&self) -> bool {
90        true
91    }
92
93    /// See <https://spark.apache.org/docs/latest/sql-ref-syntax-qry-select.html>
94    fn supports_values_as_table_factor(&self) -> bool {
95        true
96    }
97
98    fn require_interval_qualifier(&self) -> bool {
99        true
100    }
101
102    fn supports_bang_not_operator(&self) -> bool {
103        true
104    }
105
106    fn supports_select_item_multi_column_alias(&self) -> bool {
107        true
108    }
109
110    fn supports_cte_without_as(&self) -> bool {
111        true
112    }
113
114    /// See <https://spark.apache.org/docs/latest/sql-ref-datatypes.html>
115    fn supports_map_literal_with_angle_brackets(&self) -> bool {
116        true
117    }
118
119    /// Parse the `DIV` keyword as integer division.
120    ///
121    /// Example: `SELECT 10 DIV 3` returns `3`.
122    ///
123    /// See <https://spark.apache.org/docs/latest/sql-ref-functions-builtin-math.html>
124    fn parse_infix(
125        &self,
126        parser: &mut Parser,
127        expr: &Expr,
128        _precedence: u8,
129    ) -> Option<Result<Expr, ParserError>> {
130        if parser.parse_keyword(Keyword::DIV) {
131            let left = Box::new(expr.clone());
132            let right = Box::new(match parser.parse_expr() {
133                Ok(expr) => expr,
134                Err(e) => return Some(Err(e)),
135            });
136            Some(Ok(Expr::BinaryOp {
137                left,
138                op: BinaryOperator::MyIntegerDivide,
139                right,
140            }))
141        } else {
142            None
143        }
144    }
145}
sqlparser/dialect/spark.rs

sqlparser/dialect/
spark.rs
