mirror of
https://github.com/apache/datafusion-sqlparser-rs.git
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75 lines
2.7 KiB
Rust
75 lines
2.7 KiB
Rust
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. 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,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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use crate::dialect::Dialect;
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/// A [`Dialect`] for [Google Bigquery](https://cloud.google.com/bigquery/)
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#[derive(Debug, Default)]
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pub struct BigQueryDialect;
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impl Dialect for BigQueryDialect {
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// See https://cloud.google.com/bigquery/docs/reference/standard-sql/lexical#identifiers
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fn is_delimited_identifier_start(&self, ch: char) -> bool {
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ch == '`'
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}
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fn supports_projection_trailing_commas(&self) -> bool {
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true
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}
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fn is_identifier_start(&self, ch: char) -> bool {
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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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ch.is_ascii_lowercase() || ch.is_ascii_uppercase() || ch.is_ascii_digit() || ch == '_'
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}
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/// See [doc](https://cloud.google.com/bigquery/docs/reference/standard-sql/lexical#quoted_literals)
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fn supports_triple_quoted_string(&self) -> bool {
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true
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}
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/// See [doc](https://cloud.google.com/bigquery/docs/reference/standard-sql/navigation_functions#first_value)
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fn supports_window_function_null_treatment_arg(&self) -> bool {
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true
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}
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// See https://cloud.google.com/bigquery/docs/reference/standard-sql/lexical#escape_sequences
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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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/// See [doc](https://cloud.google.com/bigquery/docs/reference/standard-sql/window-function-calls#ref_named_window)
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fn supports_window_clause_named_window_reference(&self) -> bool {
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true
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}
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/// See [doc](https://cloud.google.com/bigquery/docs/reference/standard-sql/procedural-language#set)
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fn supports_parenthesized_set_variables(&self) -> bool {
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true
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}
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// See https://cloud.google.com/bigquery/docs/reference/standard-sql/query-syntax#select_except
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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 require_interval_qualifier(&self) -> bool {
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true
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}
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}
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