toasty_core/stmt/
expr_length.rs

1use super::Expr;
2
3/// Integer: number of elements in an array.
4///
5/// PostgreSQL: `cardinality(expr)`. Drives [`Path::len`](super::Path) and
6/// [`Path::is_empty`](super::Path).
7#[derive(Debug, Clone, PartialEq)]
8pub struct ExprLength {
9    /// The array whose length is being measured.
10    pub expr: Box<Expr>,
11}
12
13impl Expr {
14    /// Build an array-length expression (`cardinality(expr)` on PostgreSQL).
15    pub fn array_length(expr: impl Into<Self>) -> Self {
16        ExprLength {
17            expr: Box::new(expr.into()),
18        }
19        .into()
20    }
21}
22
23impl From<ExprLength> for Expr {
24    fn from(value: ExprLength) -> Self {
25        Self::Length(value)
26    }
27}

toasty_core/stmt/expr_length.rs

toasty_core/stmt/
expr_length.rs