Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/19811#discussion_r156851696
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
---
@@ -179,11 +209,64 @@ class CodegenContext {
* the list of default imports available.
* Also, generic type arguments are accepted but ignored.
* @param variableName Name of the field.
- * @param initCode The statement(s) to put into the init() method to
initialize this field.
- * If left blank, the field will be default-initialized.
+ * @param initFunc Function includes statement(s) to put into the init()
method to initialize
+ * this field. An argument is the name of the mutable state
variable.
--- End diff --
nit: indentation
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