Struct ValuePredicate 

pub struct ValuePredicate {
    pub column: ColumnRef,
    pub eval_type: EvalType,
    pub value: Value,
}

A value predicate compares a column to a literal value.

Fields

column: ColumnRef

eval_type: EvalType

value: Value

Implementations

impl ValuePredicate

pub fn new(column: ColumnRef, eval_type: EvalType, value: Value) -> Self

pub fn eq(column: ColumnRef, value: Value) -> Self

pub fn ne(column: ColumnRef, value: Value) -> Self

pub fn lt(column: ColumnRef, value: Value) -> Self

pub fn le(column: ColumnRef, value: Value) -> Self

pub fn gt(column: ColumnRef, value: Value) -> Self

pub fn ge(column: ColumnRef, value: Value) -> Self

Trait Implementations

impl Clone for ValuePredicate

fn clone(&self) -> ValuePredicate

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ValuePredicate

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Predicate for ValuePredicate

fn eval(&self, row: &Row) -> bool

Evaluates the predicate against a row.

fn columns(&self) -> Vec<&ColumnRef>

Returns the columns referenced by this predicate.

fn tables(&self) -> Vec<&str>

Returns the tables referenced by this predicate.