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Support FILTER in over clause (#1007)

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Co-authored-by: Andrew Lamb <andrew@nerdnetworks.org>
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Ophir LOJKINE 2023-10-24 00:06:39 +02:00 • committed by GitHub
parent e857a45201
commit ce62fe6d27
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15 changed files with 102 additions and 2 deletions
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14
src/parser/mod.rs
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@ -772,6 +772,7 @@ impl<'a> Parser<'a> {
Ok(Expr::Function(Function {
name: ObjectName(vec![w.to_ident()]),
args: vec![],
filter: None,
over: None,
distinct: false,
special: true,
@ -957,6 +958,17 @@ impl<'a> Parser<'a> {
self.expect_token(&Token::LParen)?;
let distinct = self.parse_all_or_distinct()?.is_some();
let (args, order_by) = self.parse_optional_args_with_orderby()?;
let filter = if self.dialect.supports_filter_during_aggregation()
&& self.parse_keyword(Keyword::FILTER)
&& self.consume_token(&Token::LParen)
&& self.parse_keyword(Keyword::WHERE)
{
let filter = Some(Box::new(self.parse_expr()?));
self.expect_token(&Token::RParen)?;
filter
} else {
None
};
let over = if self.parse_keyword(Keyword::OVER) {
if self.consume_token(&Token::LParen) {
let window_spec = self.parse_window_spec()?;
@ -970,6 +982,7 @@ impl<'a> Parser<'a> {
Ok(Expr::Function(Function {
name,
args,
filter,
over,
distinct,
special: false,
@ -987,6 +1000,7 @@ impl<'a> Parser<'a> {
Ok(Expr::Function(Function {
name,
args,
filter: None,
over: None,
distinct: false,
special,