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Add support for quoted string backslash escaping (#1177)

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Ifeanyi Ubah 2024-04-21 15:07:56 +02:00 • committed by GitHub
parent 7b49c69b3a
commit d2c2b15f9e
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18 changed files with 352 additions and 996 deletions
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21
src/dialect/mod.rs
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@ -120,6 +120,23 @@ pub trait Dialect: Debug + Any {
fn is_identifier_start(&self, ch: char) -> bool;
/// Determine if a character is a valid unquoted identifier character
fn is_identifier_part(&self, ch: char) -> bool;
/// Determine if the dialect supports escaping characters via '\' in string literals.
///
/// Some dialects like BigQuery and Snowflake support this while others like
/// Postgres do not. Such that the following is accepted by the former but
/// rejected by the latter.
/// ```sql
/// SELECT 'ab\'cd';
/// ```
///
/// Conversely, such dialects reject the following statement which
/// otherwise would be valid in the other dialects.
/// ```sql
/// SELECT '\';
/// ```
fn supports_string_literal_backslash_escape(&self) -> bool {
false
}
/// Does the dialect support `FILTER (WHERE expr)` for aggregate queries?
fn supports_filter_during_aggregation(&self) -> bool {
false
@ -306,6 +323,10 @@ mod tests {
self.0.identifier_quote_style(identifier)
}
fn supports_string_literal_backslash_escape(&self) -> bool {
self.0.supports_string_literal_backslash_escape()
}
fn is_proper_identifier_inside_quotes(
&self,
chars: std::iter::Peekable<std::str::Chars<'_>>,