Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/21537#discussion_r195284269
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
---
@@ -579,6 +579,22 @@ class CodegenContext {
s"${fullName}_$id"
}
+ /**
+ * Creates an `ExprValue` representing a local java variable of required
data type.
+ */
+ def freshName(name: String, dt: DataType): VariableValue =
JavaCode.variable(freshName(name), dt)
--- End diff --
Putting it in `CodeGenerator` is just for convenience that we can save a
`ctx` parameter. I'm fine to let it in `JavaCode` too if you don't think it's
verbose.
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