ygjia commented on code in PR #7187:
URL: https://github.com/apache/kyuubi/pull/7187#discussion_r2596978780
##########
extensions/spark/kyuubi-spark-authz/src/main/scala/org/apache/kyuubi/plugin/spark/authz/ranger/RangerSparkExtension.scala:
##########
@@ -45,6 +45,7 @@ class RangerSparkExtension extends (SparkSessionExtensions =>
Unit) {
override def apply(v1: SparkSessionExtensions): Unit = {
v1.injectCheckRule(AuthzConfigurationChecker)
+ v1.injectCheckRule(RuleFunctionAuthorization)
Review Comment:
During the injectOptimizerRule stage, some UDFs may be optimized away, which
can prevent permission control. For example, in the SQL:
```
SELECT my_to_upper("AaaAe") AS col_upper, my_constant() AS col_constant;
```
Here, my_to_upper converts a string to uppercase, and my_constant returns a
constant value. Using injectCheckRule, these two UDFs can be detected,
```
Project [HiveSimpleUDF#xxx.xxx.hive.custom.ToUpperCaseUDF(AaaAe) AS
col_upper#4, HiveSimpleUDF#xxx.xxx.hive.custom.ConstantUDF() AS col_constant#5]
+- OneRowRelation
```
<img width="906" height="236" alt="image"
src="https://github.com/user-attachments/assets/c45cb55e-e07a-4f92-b8c0-ee0309999dc1";
/>
but during the injectOptimizerRule stage, they will be optimized to their
resulting values.
```
Project [AAAAE AS col_upper#4, 10086 AS col_constant#5]
+- OneRowRelation
```
<img width="650" height="270" alt="image"
src="https://github.com/user-attachments/assets/1519bc83-7bcc-45a2-a0b9-8a8c903a03a0";
/>
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