Enum JoinValue 

pub enum JoinValue {
    Null,
    Boolean(bool),
    Integer(i64),
    Float(f64),
    String(String),
}

A value that can be compared in join conditions.

Variants

Null

Null value.

Boolean(bool)

Boolean value.

Integer(i64)

Integer value (stored as i64 for uniformity).

Float(f64)

Float value (stored as f64 for uniformity).

String(String)

String value.

Implementations

impl JoinValue

pub fn is_null(&self) -> bool

Check if this value is null.

pub fn to_hash_key(&self) -> String

Convert to hashable key for hash join.

pub fn equals(&self, other: &JoinValue) -> Option<bool>

Compare with another value for equality.

pub fn compare(&self, other: &JoinValue) -> Option<Ordering>

Compare with another value.

pub fn negate(&self) -> Option<JoinValue>

Negate for arithmetic operations.

pub fn not(&self) -> Option<JoinValue>

Logical NOT.

pub fn add(&self, other: &JoinValue) -> Option<JoinValue>

Add two values.

pub fn subtract(&self, other: &JoinValue) -> Option<JoinValue>

Subtract two values.

pub fn multiply(&self, other: &JoinValue) -> Option<JoinValue>

Multiply two values.

pub fn divide(&self, other: &JoinValue) -> Option<JoinValue>

Divide two values.

pub fn modulo(&self, other: &JoinValue) -> Option<JoinValue>

Modulo two values.

pub fn to_bool(&self) -> Option<bool>

Convert to boolean for logical operations.

pub fn matches_like(&self, pattern: &JoinValue) -> Option<bool>

Check if string matches LIKE pattern.

pub fn like_match(text: &str, pattern: &str) -> bool

Simple LIKE pattern matching (supports % and _).

Trait Implementations

impl Clone for JoinValue

fn clone(&self) -> JoinValue

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for JoinValue

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

Formats the value using the given formatter.

impl PartialEq for JoinValue

fn eq(&self, other: &JoinValue) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for JoinValue