Struct SSTablePredicate 

pub struct SSTablePredicate {
    pub column: String,
    pub operation: SSTableFilterOp,
    pub values: Vec<Value>,
    pub token_columns: Option<Vec<String>>,
}

SSTable-level predicate that can be pushed down

Fields

column: String

operation: SSTableFilterOp

values: Vec<Value>

token_columns: Option<Vec<String>>

When Some, this predicate constrains the Murmur3 token of the partition key formed by these columns (e.g. WHERE token(pk) >= ?), rather than a stored column value (Issue #955, Epic #951). The bound(s) in Self::values are Value::BigInt token values, and evaluation hashes the row’s raw partition key with cassandra_murmur3_token and compares it to the bound — Cassandra’s Murmur3Partitioner semantics.

None for ordinary column predicates. Carries the partition-key column names (in declared order) so a multi-column token(a, b) is supported, keeping the representation typed rather than encoding intent in Self::column.

Implementations

impl SSTablePredicate

pub fn column( column: impl Into<String>, operation: SSTableFilterOp, values: Vec<Value>, ) -> Self

Construct an ordinary column predicate (token_columns: None).

pub fn token( token_columns: Vec<String>, operation: SSTableFilterOp, values: Vec<Value>, ) -> Self

Construct a token predicate over token_columns (the partition-key columns, in declared order). column is a human-readable label ("token(a, b)") used only for diagnostics; evaluation never reads a stored column with that name — it hashes the row key instead.

pub fn is_token(&self) -> bool

True if this predicate constrains the partition-key token rather than a stored column (Issue #955).

Trait Implementations

impl Clone for SSTablePredicate

fn clone(&self) -> SSTablePredicate

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SSTablePredicate

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

Formats the value using the given formatter.