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make parse_expr_with_alias public (#1444)

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Co-authored-by: Andrew Lamb <andrew@nerdnetworks.org>
Co-authored-by: Ifeanyi Ubah <ify1992@yahoo.com>
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Eason 2024-09-29 17:58:00 +08:00 • committed by GitHub
parent 8a534c0e27
commit 08fc6d3813
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1 changed files with 24 additions and 1 deletions
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25
src/parser/mod.rs
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@ -10377,8 +10377,31 @@ impl<'a> Parser<'a> {
Ok(ExprWithAlias { expr, alias })
}
/// Parses an expression with an optional alias
fn parse_expr_with_alias(&mut self) -> Result<ExprWithAlias, ParserError> {
/// Examples:
/// ```sql
/// SUM(price) AS total_price
/// ```
/// ```sql
/// SUM(price)
/// ```
///
/// Example
/// ```
/// # use sqlparser::parser::{Parser, ParserError};
/// # use sqlparser::dialect::GenericDialect;
/// # fn main() ->Result<(), ParserError> {
/// let sql = r#"SUM("a") as "b""#;
/// let mut parser = Parser::new(&GenericDialect).try_with_sql(sql)?;
/// let expr_with_alias = parser.parse_expr_with_alias()?;
/// assert_eq!(Some("b".to_string()), expr_with_alias.alias.map(|x|x.value));
/// # Ok(())
/// # }
pub fn parse_expr_with_alias(&mut self) -> Result<ExprWithAlias, ParserError> {
let expr = self.parse_expr()?;
let alias = if self.parse_keyword(Keyword::AS) {
Some(self.parse_identifier(false)?)