mirror of
https://github.com/apache/datafusion-sqlparser-rs.git
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40 lines
1.3 KiB
Rust
40 lines
1.3 KiB
Rust
// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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use crate::dialect::Dialect;
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// A [`Dialect`] for [ClickHouse](https://clickhouse.com/).
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#[derive(Debug)]
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pub struct ClickHouseDialect {}
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impl Dialect for ClickHouseDialect {
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fn is_identifier_start(&self, ch: char) -> bool {
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// See https://clickhouse.com/docs/en/sql-reference/syntax/#syntax-identifiers
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ch.is_ascii_lowercase() || ch.is_ascii_uppercase() || ch == '_'
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}
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fn is_identifier_part(&self, ch: char) -> bool {
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self.is_identifier_start(ch) || ch.is_ascii_digit()
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}
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fn supports_string_literal_backslash_escape(&self) -> bool {
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true
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}
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fn supports_select_wildcard_except(&self) -> bool {
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true
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}
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fn describe_requires_table_keyword(&self) -> bool {
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true
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}
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}
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