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Eval

mz_expr

Trait Eval 

Source 
pub trait Eval {
    // Required methods
    fn eval<'a>(
        &'a self,
        datums: &[Datum<'a>],
        temp_storage: &'a RowArena,
    ) -> Result<Datum<'a>, EvalError>;
    fn could_error(&self) -> bool;
}

Required Methods§

Source

fn eval<'a>( &'a self, datums: &[Datum<'a>], temp_storage: &'a RowArena, ) -> Result<Datum<'a>, EvalError>

Evaluates, where datums are column references and temp_storage is used for allocation.

Should not panic, but instead return an appropriate EvalError.

Source

fn could_error(&self) -> bool

True iff evaluation could possibly error on non-error input Datum.

Dyn Compatibility§

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors§