Trait IntoExpr 

pub trait IntoExpr {
    // Required method
    fn into_expr(self) -> Expr;
}

Conversion trait for types that can be turned into an Expr.

This trait is implemented for:

• Expr – returned as-is.
• &str and String – converted to a column reference via col().
• Expression – wrapped directly in an Expr.

It is used as a generic bound throughout the builder API so that functions like select(), SelectBuilder::order_by(), and SelectBuilder::group_by() can accept plain strings, Expr values, or raw Expression nodes interchangeably.

Required Methods

fn into_expr(self) -> Expr

Convert this value into an Expr.

Implementations on Foreign Types

impl IntoExpr for &str

fn into_expr(self) -> Expr

Convert a string slice to a column reference via col().

impl IntoExpr for String

fn into_expr(self) -> Expr

Convert an owned string to a column reference via col().

Implementors

impl IntoExpr for Expression

impl IntoExpr for Expr