HeartSaVioR commented on a change in pull request #27019: [SPARK-30027][SQL]
Support codegen for aggregate filters in HashAggregateExec
URL: https://github.com/apache/spark/pull/27019#discussion_r371073779
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/HashAggregateExec.scala
##########
@@ -329,6 +328,39 @@ case class HashAggregateExec(
}
}
+ private def generateEvalCodeForAggFuncs(
+ ctx: CodegenContext,
+ input: Seq[ExprCode],
+ inputAttrs: Seq[Attribute],
+ boundUpdateExprs: Seq[Seq[Expression]],
+ aggNames: Seq[String],
+ aggCodeBlocks: Seq[Block],
+ subExprs: SubExprCodes): String = {
+ val aggCodes = if (conf.codegenSplitAggregateFunc &&
+ aggCodeBlocks.map(_.length).sum > conf.methodSplitThreshold) {
+ val maybeSplitCodes = splitAggregateExpressions(
+ ctx, aggNames, boundUpdateExprs, aggCodeBlocks, subExprs.states)
+
+ maybeSplitCodes.getOrElse(aggCodeBlocks.map(_.code))
+ } else {
+ aggCodeBlocks.map(_.code)
+ }
+
+ aggCodes.zip(aggregateExpressions.map(ae => (ae.mode, ae.filter))).map {
+ case (aggCode, (Partial | Complete, Some(condition))) =>
+ // Note: wrap in "do { } while(false);", so the generated checks can
jump out
+ // with "continue;"
+ s"""
+ |do {
+ | ${generatePredicateCode(ctx, condition, inputAttrs, input)}
+ | $aggCode
+ |} while(false);
Review comment:
NOTE in above code comment would be enough to explain why, right? It still
executes only once, but be able to exit the specific code block instead of
exiting the function/method in the middle of the code.
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