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[SPARK-20283][SQL] Add preOptimizationBatches #17595

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[SPARK-20283][SQL] Add preOptimizationBatches #17595

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8 changes: 7 additions & 1 deletion sql/core/src/main/scala/org/apache/spark/sql/execution/SparkOptimizer.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -30,13 +30,19 @@ class SparkOptimizer(
experimentalMethods: ExperimentalMethods)
extends Optimizer(catalog, conf) {

override def batches: Seq[Batch] = (super.batches :+
override def batches: Seq[Batch] = (preOptimizationBatches ++ super.batches :+
Batch("Optimize Metadata Only Query", Once, OptimizeMetadataOnlyQuery(catalog, conf)) :+
Batch("Extract Python UDF from Aggregate", Once, ExtractPythonUDFFromAggregate) :+
Batch("Prune File Source Table Partitions", Once, PruneFileSourcePartitions)) ++
postHocOptimizationBatches :+
Batch("User Provided Optimizers", fixedPoint, experimentalMethods.extraOptimizations: _*)

/**
* Optimization batches that are executed before the regular optimization batches (also before
* the finish analysis batch).
*/
def preOptimizationBatches: Seq[Batch] = Nil

/**
* Optimization batches that are executed after the regular optimization batches, but before the
* batch executing the [[ExperimentalMethods]] optimizer rules. This hook can be used to add
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