Enum WhereExpression 

pub enum WhereExpression {
    Comparison(ComparisonExpression),
    And(Vec<WhereExpression>),
    Or(Vec<WhereExpression>),
    Not(Box<WhereExpression>),
    Parentheses(Box<WhereExpression>),
}

Advanced WHERE expression tree

Variants

Comparison(ComparisonExpression)

Simple comparison

And(Vec<WhereExpression>)

Logical AND

Or(Vec<WhereExpression>)

Logical OR

Not(Box<WhereExpression>)

Logical NOT

Parentheses(Box<WhereExpression>)

Parenthesized expression

Implementations

impl WhereExpression

pub fn get_column_refs(&self) -> Vec<ColumnRef>

Get all column references in this WHERE expression

pub fn can_pushdown_to_sstable(&self) -> bool

Check if this WHERE expression can be pushed down to SSTable level.

OR and NOT are excluded: efficient pushdown of those would require index intersection / negative scans we don’t currently support.

Trait Implementations

impl Clone for WhereExpression

fn clone(&self) -> WhereExpression

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WhereExpression

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for WhereExpression

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for WhereExpression

fn eq(&self, other: &WhereExpression) -> 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 Serialize for WhereExpression

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for WhereExpression