Github user mgaido91 commented on a diff in the pull request:
https://github.com/apache/spark/pull/19811#discussion_r156349126
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
---
@@ -1179,6 +1257,18 @@ object CodeGenerator extends Logging {
// class.
val GENERATED_CLASS_SIZE_THRESHOLD = 1000000
+ // This is the threshold for the number of global variables, whose types
are primitive type or
+ // complex type (e.g. more than one-dimensional array), that will be
placed at the outer class
+ val OUTER_CLASS_VARIABLES_THRESHOLD = 10000
+
+ // This is the maximum number of array elements to keep global variables
in one Java array
+ // 32767 is the maximum integer value that does not require a constant
pool entry in a Java
+ // bytecode instruction
+ val MUTABLESTATEARRAY_SIZE_LIMIT = 32768
+
+ // This is an index variable name used in a loop for initializing global
variables
+ val INIT_LOOP_VARIABLE_NAME = "i"
--- End diff --
this is not needed anymore IMHO
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