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Support named windows in OVER (window_definition) clause (#1166)

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Co-authored-by: Andrew Lamb <andrew@nerdnetworks.org>
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Nikita-str 2024-04-07 15:20:21 +03:00 • committed by GitHub
parent 83c5d8191b
commit 23103302e6
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4 changed files with 92 additions and 2 deletions
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15
src/ast/mod.rs
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@ -1246,11 +1246,19 @@ impl Display for WindowType {
}
}
/// A window specification (i.e. `OVER (PARTITION BY .. ORDER BY .. etc.)`)
/// A window specification (i.e. `OVER ([window_name] PARTITION BY .. ORDER BY .. etc.)`)
#[derive(Debug, Clone, PartialEq, PartialOrd, Eq, Ord, Hash)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[cfg_attr(feature = "visitor", derive(Visit, VisitMut))]
pub struct WindowSpec {
/// Optional window name.
///
/// You can find it at least in [MySQL][1], [BigQuery][2], [PostgreSQL][3]
///
/// [1]: https://dev.mysql.com/doc/refman/8.0/en/window-functions-named-windows.html
/// [2]: https://cloud.google.com/bigquery/docs/reference/standard-sql/window-function-calls
/// [3]: https://www.postgresql.org/docs/current/sql-expressions.html#SYNTAX-WINDOW-FUNCTIONS
pub window_name: Option<Ident>,
/// `OVER (PARTITION BY ...)`
pub partition_by: Vec<Expr>,
/// `OVER (ORDER BY ...)`
@ -1262,7 +1270,12 @@ pub struct WindowSpec {
impl fmt::Display for WindowSpec {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let mut delim = "";
if let Some(window_name) = &self.window_name {
delim = " ";
write!(f, "{window_name}")?;
}
if !self.partition_by.is_empty() {
f.write_str(delim)?;
delim = " ";
write!(
f,