mz_sql::plan::hir

Trait AbstractExpr

Source 
pub trait AbstractExpr {
    type Type: AbstractColumnType;

    // Required method
    fn typ(
        &self,
        outers: &[SqlRelationType],
        inner: &SqlRelationType,
        params: &BTreeMap<usize, SqlScalarType>,
    ) -> Self::Type;
}
Expand description

An expression whose type can be ascertained.

Abstracts over ScalarExpr and CoercibleScalarExpr.

Required Associated Types§

Source

type Type: AbstractColumnType

Required Methods§

Source

fn typ( &self, outers: &[SqlRelationType], inner: &SqlRelationType, params: &BTreeMap<usize, SqlScalarType>, ) -> Self::Type

Computes the type of the expression.

Implementors§