Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/19031#discussion_r134918888
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala ---
@@ -577,9 +577,11 @@ object SQLConf {
.doc("The maximum lines of a single Java function generated by
whole-stage codegen. " +
"When the generated function exceeds this threshold, " +
"the whole-stage codegen is deactivated for this subtree of the
current query plan. " +
- "The default value 4000 is the max length of byte code JIT supported
" +
- "for a single function(8000) divided by 2.")
+ "The default value 2667 is the max length of byte code JIT supported
" +
+ "for a single function(8000) divided by 2. Use -1 to disable this.")
.intConf
+ .checkValue(maxLines => maxLines >= -1, "The maximum must not be a
negative integer, -1 to " +
+ "always activate whole-stage codegen.")
--- End diff --
`The maximum must not be a negative integer, except for -1 using to always
activate whole-stage codegen.`
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