org.apache.spark.sql.catalyst.optimizer
SimpleTestOptimizer
Related Docs:
class SimpleTestOptimizer
| package optimizer
org.apache.spark.sql.catalyst.optimizer
A batch of rules.
A batch of rules.
A strategy that runs until fix point or maxIterations times, whichever comes first.
A strategy that runs until fix point or maxIterations times, whichever comes first.
An execution strategy for rules that indicates the maximum number of executions.
An execution strategy for rules that indicates the maximum number of executions. If the execution reaches fix point (i.e. converge) before maxIterations, it will stop.
A strategy that only runs once.
A strategy that only runs once.
Optimize all the subqueries inside expression.
Optimize all the subqueries inside expression.
Defines a sequence of rule batches, to be overridden by the implementation.
Defines a sequence of rule batches, to be overridden by the implementation.
Executes the batches of rules defined by the subclass.
Executes the batches of rules defined by the subclass. The batches are executed serially using the defined execution strategy. Within each batch, rules are also executed serially.
Override to provide additional rules for the operator optimization batch.
Override to provide additional rules for the operator optimization batch.
An optimizer used in test code.
To ensure extendability, we leave the standard rules in the abstract optimizer rules, while specific rules go to the subclasses