Module chunk_state 

Unified chunk state tracking for factorized execution.

This module provides ChunkState for centralized state management, inspired by LadybugDB’s FStateType pattern. Key benefits:

• Cached multiplicities: Computed once, reused for all aggregates
• Selection integration: Lazy filtering without data copying
• O(1) logical row count: Cached, not recomputed

Example

let mut state = ChunkState::unflat(3, 1000);

// First access computes, subsequent accesses use cache
let mults = state.get_or_compute_multiplicities(|| expensive_compute());
let mults2 = state.get_or_compute_multiplicities(|| unreachable!());
assert!(std::ptr::eq(mults.as_ptr(), mults2.as_ptr()));

Structs

ChunkState

Unified chunk state tracking metadata for factorized execution.

FactorizedSelection

Hierarchical selection for factorized data.

Enums

FactorizationState

Factorization state of a chunk (flat vs factorized).

LevelSelection

Selection state for a single factorization level.