Struct PushdownRegistry 

pub struct PushdownRegistry { /* private fields */ }

Registry of all pushdown rules

The registry tries rules in order and returns the first successful conversion. Rules are ordered from most specific to most general.

Implementations

impl PushdownRegistry

pub fn new() -> Self

Create a new registry with all built-in rules

pub fn register(&mut self, rule: Box<dyn PushdownRule>)

Register a custom pushdown rule

pub fn try_pushdown( &self, expr: &Expression, schema: &Schema, exec_ctx: Option<&ExecutionContext>, ) -> (Option<Box<dyn StorageExpr>>, bool)

Try to push down an expression to storage layer

Returns (Option<StorageExpr>, needs_memory_filter)

Trait Implementations

impl Default for PushdownRegistry

fn default() -> Self

Returns the “default value” for a type.