Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/7076#discussion_r34945162
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateMutableProjection.scala
---
@@ -45,7 +45,37 @@ object GenerateMutableProjection extends
CodeGenerator[Seq[Expression], () => Mu
else
${ctx.setColumn("mutableRow", e.dataType, i,
evaluationCode.primitive)};
"""
- }.mkString("\n")
+ }
+ val projectionBlocks = projectionCode.foldLeft(List.empty[String]) {
+ (acc, code) =>
+ acc match {
+ case Nil => List(code)
+ case head::tail =>
+ // code size limit is 64kb and each char takes less or equal
to 2 bytes
+ if (head.length < 32 * 1000) {
--- End diff --
can you give it more factor of safety? e.g. use 16k?
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