Module datafusion::optimizer [−][src]
This module contains a query optimizer that operates against a logical plan and applies some simple rules to a logical plan, such as “Projection Push Down” and “Type Coercion”.
Modules
| constant_folding | Boolean comparision rule rewrites redudant comparison expression involing boolean literal into unary expression. |
| filter_push_down | Filter Push Down optimizer rule ensures that filters are applied as early as possible in the plan |
| hash_build_probe_order | Optimizer rule to switch build and probe order of hash join
based on statistics of a |
| 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 |
| utils | Collection of utility functions that are leveraged by the query optimizer rules |