Crate datafusion_optimizer

Re-exports

• pub use optimizer::OptimizerConfig;
• pub use optimizer::OptimizerContext;
• pub use optimizer::OptimizerRule;
• pub use utils::optimize_children;

Modules

• analyzer
• common_subexpr_eliminate
  Eliminate common sub-expression.
• decorrelate
• decorrelate_predicate_subquery
• eliminate_cross_join
  Optimizer rule to eliminate cross join to inner join if join predicates are available in filters.
• eliminate_duplicated_expr
• eliminate_filter
  Optimizer rule to replace where false or null on a plan with an empty relation. This saves time in planning and executing the query. Note that this rule should be applied after simplify expressions optimizer rule.
• eliminate_join
• eliminate_limit
  Optimizer rule to replace LIMIT 0 or LIMIT whose ancestor LIMIT's skip is greater than or equal to current's fetch on a plan with an empty relation. This rule also removes OFFSET 0 from the LogicalPlan This saves time in planning and executing the query.
• eliminate_nested_union
  Optimizer rule to replace nested unions to single union.
• eliminate_one_union
  Optimizer rule to eliminate one union.
• eliminate_outer_join
  Optimizer rule to eliminate left/right/full join to inner join if possible.
• extract_equijoin_predicate
  ExtractEquijoinPredicate rule that extracts equijoin predicates
• filter_null_join_keys
  The FilterNullJoinKeys rule will identify inner joins with equi-join conditions where the join key is nullable on one side and non-nullable on the other side and then insert an IsNotNull filter on the nullable side since null values can never match.
• optimize_projections
  Optimizer rule to prune unnecessary columns from intermediate schemas inside the LogicalPlan. This rule:
• optimizer
  Query optimizer traits
• propagate_empty_relation
• push_down_filter
  PushDownFilter Moves filters so they are applied as early as possible in the plan.
• push_down_limit
  Optimizer rule to push down LIMIT in the query plan It will push down through projection, limits (taking the smaller limit)
• push_down_projection
  Projection Push Down optimizer rule ensures that only referenced columns are loaded into memory
• replace_distinct_aggregate
• rewrite_disjunctive_predicate
• scalar_subquery_to_join
• simplify_expressions
• single_distinct_to_groupby
  single distinct to group by optimizer rule
• unwrap_cast_in_comparison
  Unwrap-cast binary comparison rule can be used to the binary/inlist comparison expr now, and other type of expr can be added if needed. This rule can reduce adding the Expr::Cast the expr instead of adding the Expr::Cast to literal expr.
• utils
  Collection of utility functions that are leveraged by the query optimizer rules