Crate datafusion_physical_optimizer

Modules

• aggregate_statistics
  Utilizing exact statistics from sources to avoid scanning data
• combine_partial_final_agg
  CombinePartialFinalAggregate optimizer rule checks the adjacent Partial and Final AggregateExecs and try to combine them if necessary
• limit_pushdown
  LimitPushdown pushes LIMIT down through ExecutionPlans to reduce data transfer as much as possible.
• limited_distinct_aggregation
  A special-case optimizer rule that pushes limit into a grouped aggregation which has no aggregate expressions or sorting requirements
• output_requirements
  The GlobalOrderRequire optimizer rule either:
• topk_aggregation
  An optimizer rule that detects aggregate operations that could use a limited bucket count

Traits

• PhysicalOptimizerRule
  PhysicalOptimizerRule transforms one [‘ExecutionPlan’] into another which computes the same results, but in a potentially more efficient way.