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Posted to reviews@spark.apache.org by "utkarsh39 (via GitHub)" <gi...@apache.org> on 2025/01/07 05:35:10 UTC
[PR] [SPARK-50749] Fix ordering bug in CommutativeExpression.gatherCommutative method [spark]
utkarsh39 opened a new pull request, #49392:
URL: https://github.com/apache/spark/pull/49392
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### What changes were proposed in this pull request?
[SPARK-49977](https://issues.apache.org/jira/browse/SPARK-49977) introduced a bug in the `CommutativeExpression.gatherCommutative()` method, changing the function's output order.
Consider the following concrete example:
```
val addExpression = Add(
Literal(1),
Add(
Literal(2),
Literal(3)
)
)
val commutativeExpressions = addExpression.gatherCommutative(addExpression,
{ case Add(l, r, _) => Seq(l, r)})
```
Consider the output of the `gatherCommutative` method. [SPARK-49977](https://issues.apache.org/jira/browse/SPARK-49977) introduced a bug that reversed the output order. This PR fixes the bug in `gatherCommutative()` to restore the original correct ordered output.
```
// Prior to [SPARK-49977](https://issues.apache.org/jira/browse/SPARK-49977) and after this fix
// commutativeExpressions -> Seq(Literal(1), Literal(2), Literal(3)))
// Post [SPARK-49977](https://issues.apache.org/jira/browse/SPARK-49977) and before this fix
// commutativeExpressions -> Seq(Literal(3), Literal(2), Literal(1)))
```
### Why are the changes needed?
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Fixing a bug
### Does this PR introduce _any_ user-facing change?
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No
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Added a test
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Re: [PR] [SPARK-50749][SQL] Fix ordering bug in CommutativeExpression.gatherCommutative method [spark]
Posted by "cloud-fan (via GitHub)" <gi...@apache.org>.
cloud-fan commented on code in PR #49392:
URL: https://github.com/apache/spark/pull/49392#discussion_r1908074445
##########
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ArithmeticExpressionSuite.scala:
##########
@@ -1086,4 +1086,17 @@ class ArithmeticExpressionSuite extends SparkFunSuite with ExpressionEvalHelper
checkEvaluation(IntegralDivide(Literal(Duration.ofDays(1)),
Literal(Duration.ofHours(-5))), -4L)
}
+
+ test("unit test for gatherCommutative()") {
Review Comment:
can we move this test to `CanonicalizeSuite`?
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Re: [PR] [SPARK-50749][SQL] Fix ordering bug in CommutativeExpression.gatherCommutative method [spark]
Posted by "cloud-fan (via GitHub)" <gi...@apache.org>.
cloud-fan closed pull request #49392: [SPARK-50749][SQL] Fix ordering bug in CommutativeExpression.gatherCommutative method
URL: https://github.com/apache/spark/pull/49392
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Re: [PR] [SPARK-50749][SQL] Fix ordering bug in CommutativeExpression.gatherCommutative method [spark]
Posted by "utkarsh39 (via GitHub)" <gi...@apache.org>.
utkarsh39 commented on code in PR #49392:
URL: https://github.com/apache/spark/pull/49392#discussion_r1908125559
##########
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ArithmeticExpressionSuite.scala:
##########
@@ -1086,4 +1086,17 @@ class ArithmeticExpressionSuite extends SparkFunSuite with ExpressionEvalHelper
checkEvaluation(IntegralDivide(Literal(Duration.ofDays(1)),
Literal(Duration.ofHours(-5))), -4L)
}
+
+ test("unit test for gatherCommutative()") {
Review Comment:
Done
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Re: [PR] [SPARK-50749][SQL] Fix ordering bug in CommutativeExpression.gatherCommutative method [spark]
Posted by "cloud-fan (via GitHub)" <gi...@apache.org>.
cloud-fan commented on PR #49392:
URL: https://github.com/apache/spark/pull/49392#issuecomment-2579221193
The first commit passed CI (spark connect failure unrelated), and the new commit just moved the test. I'm merging it to master, thanks!
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