Copilot commented on code in PR #13214:
URL: https://github.com/apache/gluten/pull/13214#discussion_r4479970808


##########
backends-velox/src/test/scala/org/apache/gluten/functions/ScalarFunctionsValidateSuite.scala:
##########
@@ -197,6 +197,62 @@ class ScalarFunctionsValidateSuite extends 
FunctionsValidateSuite {
     }
   }
 
+  test("shiftrightunsigned") {
+    withTempPath {
+      path =>
+        withTempView("shift_input") {
+          Seq[(Integer, java.lang.Long, Integer)](
+            (8, 8L, 1),
+            (-1, -1L, 1),
+            (Int.MinValue, Long.MinValue, 1),
+            (Int.MinValue, Long.MinValue, 31),
+            (-1, -1L, 32),
+            (-1, -1L, 33),
+            (-1, -1L, 63),
+            (-1, -1L, 64),
+            (-1, -1L, 65),
+            (-1, -1L, -1),
+            (Int.MinValue, Long.MinValue, Int.MaxValue),
+            (null, null, 1),
+            (1, 1L, null)
+          )
+            .toDF("int_value", "long_value", "shift")
+            .write
+            .parquet(path.getCanonicalPath)
+
+          
spark.read.parquet(path.getCanonicalPath).createOrReplaceTempView("shift_input")
+          runQueryAndCompare(
+            """
+              |SELECT
+              |  shiftrightunsigned(int_value, shift),
+              |  shiftrightunsigned(long_value, shift)
+              |FROM shift_input
+              |""".stripMargin) {

Review Comment:
   These queries don’t specify an ORDER BY. Reads from Parquet can be 
non-deterministic in row order, which can make parity comparisons flaky 
depending on how `runQueryAndCompare` validates results. Adding a deterministic 
ORDER BY (e.g., on `int_value`, `long_value`, `shift`) would make the test more 
stable.



##########
backends-velox/src/test/scala/org/apache/gluten/functions/ScalarFunctionsValidateSuite.scala:
##########
@@ -197,6 +197,62 @@ class ScalarFunctionsValidateSuite extends 
FunctionsValidateSuite {
     }
   }
 
+  test("shiftrightunsigned") {
+    withTempPath {
+      path =>
+        withTempView("shift_input") {
+          Seq[(Integer, java.lang.Long, Integer)](
+            (8, 8L, 1),
+            (-1, -1L, 1),
+            (Int.MinValue, Long.MinValue, 1),
+            (Int.MinValue, Long.MinValue, 31),
+            (-1, -1L, 32),
+            (-1, -1L, 33),
+            (-1, -1L, 63),
+            (-1, -1L, 64),
+            (-1, -1L, 65),
+            (-1, -1L, -1),
+            (Int.MinValue, Long.MinValue, Int.MaxValue),
+            (null, null, 1),
+            (1, 1L, null)
+          )
+            .toDF("int_value", "long_value", "shift")
+            .write
+            .parquet(path.getCanonicalPath)
+
+          
spark.read.parquet(path.getCanonicalPath).createOrReplaceTempView("shift_input")
+          runQueryAndCompare(
+            """
+              |SELECT
+              |  shiftrightunsigned(int_value, shift),
+              |  shiftrightunsigned(long_value, shift)
+              |FROM shift_input
+              |""".stripMargin) {
+            df =>
+              checkGlutenPlan[ProjectExecTransformer](df)
+              assert(
+                
!getExecutedPlan(df).exists(_.isInstanceOf[ColumnarPartialProjectExec]),
+                "Unsigned shifts must not use partial JVM projection")
+          }
+          if (isSparkVersionGE("4.0")) {
+            runQueryAndCompare(
+              """
+                |SELECT
+                |  int_value >>> shift,
+                |  long_value >>> shift
+                |FROM shift_input
+                |""".stripMargin) {

Review Comment:
   These queries don’t specify an ORDER BY. Reads from Parquet can be 
non-deterministic in row order, which can make parity comparisons flaky 
depending on how `runQueryAndCompare` validates results. Adding a deterministic 
ORDER BY (e.g., on `int_value`, `long_value`, `shift`) would make the test more 
stable.



##########
docs/backends/velox/velox-backend-scalar-function-support.md:
##########
@@ -1,6 +1,6 @@
 # Scalar Functions Support Status
 
-**Out of 433 scalar functions in Spark 4.1, Gluten currently fully supports 
261 functions and partially supports 31 functions.**
+**Out of 433 scalar functions in Spark 4.1, Gluten currently fully supports 
262 functions and partially supports 31 functions.**

Review Comment:
   This supported-function count is hardcoded and can easily drift from the 
table contents over time. Consider generating the counts from the table (or 
removing the exact counts) so the documentation stays consistent without manual 
updates.



##########
backends-velox/src/test/scala/org/apache/gluten/functions/ScalarFunctionsValidateSuite.scala:
##########
@@ -197,6 +197,62 @@ class ScalarFunctionsValidateSuite extends 
FunctionsValidateSuite {
     }
   }
 
+  test("shiftrightunsigned") {
+    withTempPath {
+      path =>
+        withTempView("shift_input") {
+          Seq[(Integer, java.lang.Long, Integer)](
+            (8, 8L, 1),
+            (-1, -1L, 1),
+            (Int.MinValue, Long.MinValue, 1),
+            (Int.MinValue, Long.MinValue, 31),
+            (-1, -1L, 32),
+            (-1, -1L, 33),
+            (-1, -1L, 63),
+            (-1, -1L, 64),
+            (-1, -1L, 65),
+            (-1, -1L, -1),
+            (Int.MinValue, Long.MinValue, Int.MaxValue),
+            (null, null, 1),
+            (1, 1L, null)
+          )
+            .toDF("int_value", "long_value", "shift")
+            .write
+            .parquet(path.getCanonicalPath)
+
+          
spark.read.parquet(path.getCanonicalPath).createOrReplaceTempView("shift_input")
+          runQueryAndCompare(
+            """
+              |SELECT
+              |  shiftrightunsigned(int_value, shift),
+              |  shiftrightunsigned(long_value, shift)
+              |FROM shift_input
+              |""".stripMargin) {
+            df =>
+              checkGlutenPlan[ProjectExecTransformer](df)
+              assert(
+                
!getExecutedPlan(df).exists(_.isInstanceOf[ColumnarPartialProjectExec]),
+                "Unsigned shifts must not use partial JVM projection")
+          }
+          if (isSparkVersionGE("4.0")) {
+            runQueryAndCompare(
+              """
+                |SELECT
+                |  int_value >>> shift,
+                |  long_value >>> shift
+                |FROM shift_input
+                |""".stripMargin) {
+              df =>
+                checkGlutenPlan[ProjectExecTransformer](df)
+                assert(
+                  
!getExecutedPlan(df).exists(_.isInstanceOf[ColumnarPartialProjectExec]),
+                  "Unsigned shifts must not use partial JVM projection")

Review Comment:
   The plan assertions are duplicated across the function and operator 
branches. Consider extracting a small local helper (e.g., 
`assertNativeUnsignedShift(df)`) to avoid duplication and make future 
adjustments (like changing the plan-shape criteria) easier and less error-prone.



##########
backends-velox/src/test/scala/org/apache/gluten/functions/ScalarFunctionsValidateSuite.scala:
##########
@@ -197,6 +197,62 @@ class ScalarFunctionsValidateSuite extends 
FunctionsValidateSuite {
     }
   }
 
+  test("shiftrightunsigned") {
+    withTempPath {
+      path =>
+        withTempView("shift_input") {
+          Seq[(Integer, java.lang.Long, Integer)](
+            (8, 8L, 1),
+            (-1, -1L, 1),
+            (Int.MinValue, Long.MinValue, 1),
+            (Int.MinValue, Long.MinValue, 31),
+            (-1, -1L, 32),
+            (-1, -1L, 33),
+            (-1, -1L, 63),
+            (-1, -1L, 64),
+            (-1, -1L, 65),
+            (-1, -1L, -1),
+            (Int.MinValue, Long.MinValue, Int.MaxValue),
+            (null, null, 1),
+            (1, 1L, null)
+          )
+            .toDF("int_value", "long_value", "shift")
+            .write
+            .parquet(path.getCanonicalPath)
+
+          
spark.read.parquet(path.getCanonicalPath).createOrReplaceTempView("shift_input")
+          runQueryAndCompare(
+            """
+              |SELECT
+              |  shiftrightunsigned(int_value, shift),
+              |  shiftrightunsigned(long_value, shift)
+              |FROM shift_input
+              |""".stripMargin) {
+            df =>
+              checkGlutenPlan[ProjectExecTransformer](df)
+              assert(
+                
!getExecutedPlan(df).exists(_.isInstanceOf[ColumnarPartialProjectExec]),
+                "Unsigned shifts must not use partial JVM projection")

Review Comment:
   The plan assertions are duplicated across the function and operator 
branches. Consider extracting a small local helper (e.g., 
`assertNativeUnsignedShift(df)`) to avoid duplication and make future 
adjustments (like changing the plan-shape criteria) easier and less error-prone.



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