Struct NormalizedExpr 

pub struct NormalizedExpr {
    pub canonical_text: String,
    pub ast_hash: [u8; 32],
}

A normalized SQL expression — its canonical text plus a hash of the canonical AST.

The ast_hash is a BLAKE3 hash of canonical_text (the canonical bytes after keyword lowercasing, paren folding, cast stripping, and commutative-operand sorting). Two expressions hash-equal iff their canonical texts match exactly, so equivalence is decided byte-wise on the canonical form.

Fields

canonical_text: String

Canonical textual form (lowercased keywords, sorted commutative operands, stripped redundant casts).

ast_hash: [u8; 32]

BLAKE3 hash of canonical_text as bytes.

Implementations

impl NormalizedExpr

pub fn from_text(canonical_text: impl Into<String>) -> Self

Construct from already-canonical text. The hash is computed from the text.

This constructor does NOT run any normalization passes — it assumes the caller has already produced canonical form. Source-side construction goes through pgevolve_core::parse::normalize_expr::from_pg_node which deparses and normalizes a pg_query node.

pub fn from_canonical_text(text: impl Into<String>) -> Self

Alias for Self::from_text, matching the phase-2 plan vocabulary.

Trait Implementations

impl Clone for NormalizedExpr

fn clone(&self) -> NormalizedExpr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NormalizedExpr

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for NormalizedExpr

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for NormalizedExpr

impl Hash for NormalizedExpr

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for NormalizedExpr

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for NormalizedExpr

fn eq(&self, other: &NormalizedExpr) -> 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 PartialOrd for NormalizedExpr

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for NormalizedExpr

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 NormalizedExpr