Github user lw-lin commented on a diff in the pull request:
https://github.com/apache/spark/pull/15480#discussion_r83574850
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateOrdering.scala
---
@@ -118,7 +118,45 @@ object GenerateOrdering extends
CodeGenerator[Seq[SortOrder], Ordering[InternalR
}
"""
}.mkString("\n")
- comparisons
+
+ /*
+ * 40 = 7000 bytes / 170 (around 170 bytes per ordering comparison).
+ * The maximum byte code size to be compiled for HotSpot is 8000 bytes.
+ * We should keep less than 8000 bytes.
+ */
+ val numberOfComparisonsThreshold = 40
+
+ if (ordering.size <= numberOfComparisonsThreshold) {
+ s"""
+ | InternalRow ${ctx.INPUT_ROW} = null; // Holds current row
being evaluated.
+ | ${comparisons(ordering)}
+ """.stripMargin
+ } else {
+ val groupedOrderingItr =
ordering.grouped(numberOfComparisonsThreshold)
+ var groupedOrderingLength = 0
+ groupedOrderingItr.zipWithIndex.foreach { case (orderingGroup, i) =>
+ groupedOrderingLength += 1
+ val funcName = s"compare_$i"
+ val funcCode =
+ s"""
+ |private int $funcName(InternalRow a, InternalRow b) {
+ | InternalRow ${ctx.INPUT_ROW} = null; // Holds current row
being evaluated.
+ | ${comparisons(orderingGroup)}
+ | return 0;
+ |}
+ """.stripMargin
+ ctx.addNewFunction(funcName, funcCode)
+ }
+
+ (0 to groupedOrderingLength - 1).map { i =>
--- End diff --
let me fix this, thanks!
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org
For additional commands, e-mail: reviews-h...@spark.apache.org
