abstract class RuleExecutor[TreeType <: TreeNode[_]] extends Logging
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- new RuleExecutor()
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- case class Batch(name: String, strategy: Strategy, rules: Rule[TreeType]*) extends Product with Serializable
A batch of rules.
A batch of rules.
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- case class FixedPoint(maxIterations: Int, errorOnExceed: Boolean = false, maxIterationsSetting: String = null) extends Strategy with Product with Serializable
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. Especially, a FixedPoint(1) batch is supposed to run only once.
- abstract class Strategy extends AnyRef
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.
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- val excludedOnceBatches: Set[String]
Once batches that are excluded in the idempotence checker
Once batches that are excluded in the idempotence checker
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- def execute(plan: TreeType): TreeType
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.
- def executeAndTrack(plan: TreeType, tracker: QueryPlanningTracker): TreeType
Executes the batches of rules defined by the subclass, and also tracks timing info for each rule using the provided tracker.
Executes the batches of rules defined by the subclass, and also tracks timing info for each rule using the provided tracker.
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- def isPlanIntegral(previousPlan: TreeType, currentPlan: TreeType): Boolean
Defines a check function that checks for structural integrity of the plan after the execution of each rule.
Defines a check function that checks for structural integrity of the plan after the execution of each rule. For example, we can check whether a plan is still resolved after each rule in
Optimizer, so we can catch rules that return invalid plans. The check function returnsfalseif the given plan doesn't pass the structural integrity check.- Attributes
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- case object Once extends Strategy with Product with Serializable
A strategy that is run once and idempotent.