Struct ExpressionPredicate 

pub struct ExpressionPredicate { /* private fields */ }

An expression-based predicate that evaluates logical expressions.

This predicate can evaluate complex expressions involving variables, properties, and operators.

Implementations

impl ExpressionPredicate

pub fn new( expression: FilterExpression, variable_columns: HashMap<String, usize>, store: Arc<LpgStore>, ) -> Self

Creates a new expression predicate.

pub fn eval_at(&self, chunk: &DataChunk, row: usize) -> Option<Value>

Evaluates the expression for a specific row in a chunk, returning the result value. This is useful for evaluating expressions in contexts like RETURN clauses.

Trait Implementations

impl Predicate for ExpressionPredicate

fn evaluate(&self, chunk: &DataChunk, row: usize) -> bool

Evaluates the predicate for a single row.

fn might_match_chunk(&self, _hints: &ChunkZoneHints) -> bool

Returns false if zone map proves no rows in this chunk can match.