Module query_complexity 

QueryComplexityExec — classifies query complexity for depth scheduling.

Classification rules (all thresholds configurable):

• Token count > 50: +1 point
• Temporal keywords present: +1 point
• Entity count > 3: +1 point
• Multi-hop requested (EXPAND GRAPH DEPTH > 1): +1 point
• Causal query (FOLLOW CAUSES): +1 point
• Iterative mode: +1 point

Simple (0 pts) / Medium (1–2 pts) / Complex (3+ pts).

Structs

ComplexityConfig

Configuration for complexity classification thresholds.

QueryComplexityExec

DataFusion operator that classifies query complexity for depth scheduling.

QueryFeatures

Features extracted from a query for complexity classification.

Enums

Complexity

Complexity level for depth scheduling.