Enum Predicate 

pub enum Predicate {
    Eq(ColumnRef, CipherBlob),
    Gt(ColumnRef, CipherBlob),
    Lt(ColumnRef, CipherBlob),
    Gte(ColumnRef, CipherBlob),
    Lte(ColumnRef, CipherBlob),
    And(Box<Predicate>, Box<Predicate>),
    Or(Box<Predicate>, Box<Predicate>),
    Not(Box<Predicate>),
}

Predicate for filtering (executed on encrypted data via FHE)

Variants

Eq(ColumnRef, CipherBlob)

Equality test

Gt(ColumnRef, CipherBlob)

Greater than

Lt(ColumnRef, CipherBlob)

Less than

Gte(ColumnRef, CipherBlob)

Greater than or equal

Lte(ColumnRef, CipherBlob)

Less than or equal

And(Box<Predicate>, Box<Predicate>)

Logical AND

Or(Box<Predicate>, Box<Predicate>)

Logical OR

Not(Box<Predicate>)

Logical NOT

Implementations

impl Predicate

pub fn evaluate_plaintext(&self, stored: &CipherBlob) -> Option<bool>

Evaluate this predicate against a stored plaintext value.

Returns Some(true) if the value matches, Some(false) if it does not, or None if plaintext evaluation is not applicable (e.g. either the stored value or the comparison value exceeds PLAINTEXT_MAX_BYTES (64 bytes), indicating an FHE ciphertext rather than raw bytes).

Values are compared lexicographically as big-endian byte sequences. For single-byte unsigned integers this is equivalent to numeric ordering.

Trait Implementations

impl Clone for Predicate

fn clone(&self) -> Predicate

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Predicate

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

Formats the value using the given formatter.

impl PartialEq for Predicate

fn eq(&self, other: &Predicate) -> 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 Predicate