Crate datafusion_optimizer

Re-exports

pub use optimizer::OptimizerConfig;

pub use optimizer::OptimizerRule;

Modules

common_subexpr_eliminate

Eliminate common sub-expression.

eliminate_filter

Optimizer rule to replace where false 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_limit

Optimizer rule to replace LIMIT 0 on a plan with an empty relation. This saves time in planning and executing the query.

expr_simplifier

Expression simplifier

filter_push_down

Filter Push Down optimizer rule ensures that filters are applied as early as possible in the plan

limit_push_down

Optimizer rule to push down LIMIT in the query plan It will push down through projection, limits (taking the smaller limit)

optimizer

Query optimizer traits

projection_push_down

Projection Push Down optimizer rule ensures that only referenced columns are loaded into memory

simplify_expressions

Simplify expressions optimizer rule

single_distinct_to_groupby

single distinct to group by optimizer rule

subquery_filter_to_join

Optimizer rule for rewriting subquery filters to joins

utils

Collection of utility functions that are leveraged by the query optimizer rules

Macros

assert_contains

A macro to assert that one string is contained within another with a nice error message if they are not.