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Support for INTERVAL inside window frames #655

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merged 5 commits into from Oct 15, 2022
Merged

Support for INTERVAL inside window frames #655

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9a1f04f
Add support to for INTERVAL inside window queries
mustafasrepo Sep 30, 2022
be9d639
Remove the unnecessary ancillary struct Interval
ozankabak Oct 5, 2022
72c5d9d
Convert Window Frame Bound to Expr
mustafasrepo Oct 14, 2022
8292585
remove unnecessary changes
mustafasrepo Oct 14, 2022
c995427
remove unnecessary changes
mustafasrepo Oct 14, 2022
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4 changes: 2 additions & 2 deletions src/ast/mod.rs
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Expand Up @@ -880,9 +880,9 @@ pub enum WindowFrameBound {
/// `CURRENT ROW`
CurrentRow,
/// `<N> PRECEDING` or `UNBOUNDED PRECEDING`
Preceding(Option<u64>),
Preceding(Option<Box<Expr>>),
/// `<N> FOLLOWING` or `UNBOUNDED FOLLOWING`.
Following(Option<u64>),
Following(Option<Box<Expr>>),
}

impl fmt::Display for WindowFrameBound {
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6 changes: 4 additions & 2 deletions src/parser.rs
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Expand Up @@ -620,7 +620,6 @@ impl<'a> Parser<'a> {
} else {
None
};

Ok(Expr::Function(Function {
name,
args,
Expand Down Expand Up @@ -682,7 +681,10 @@ impl<'a> Parser<'a> {
let rows = if self.parse_keyword(Keyword::UNBOUNDED) {
None
} else {
Some(self.parse_literal_uint()?)
Some(Box::new(match self.peek_token() {
Token::SingleQuotedString(_) => self.parse_interval()?,
_ => self.parse_expr()?,
}))
};
if self.parse_keyword(Keyword::PRECEDING) {
Ok(WindowFrameBound::Preceding(rows))
Expand Down
6 changes: 5 additions & 1 deletion tests/sqlparser_common.rs
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Expand Up @@ -2865,13 +2865,17 @@ fn parse_window_functions() {
ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW), \
avg(bar) OVER (ORDER BY a \
RANGE BETWEEN 1 PRECEDING AND 1 FOLLOWING), \
sum(bar) OVER (ORDER BY a \
RANGE BETWEEN INTERVAL '1' DAY PRECEDING AND INTERVAL '1 MONTH' FOLLOWING), \
COUNT(*) OVER (ORDER BY a \
RANGE BETWEEN INTERVAL '1 DAY' PRECEDING AND INTERVAL '1 DAY' FOLLOWING), \
max(baz) OVER (ORDER BY a \
ROWS UNBOUNDED PRECEDING), \
sum(qux) OVER (ORDER BY a \
GROUPS BETWEEN 1 PRECEDING AND 1 FOLLOWING) \
FROM foo";
let select = verified_only_select(sql);
assert_eq!(5, select.projection.len());
assert_eq!(7, select.projection.len());
assert_eq!(
&Expr::Function(Function {
name: ObjectName(vec![Ident::new("row_number")]),
Expand Down