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new 1b966d2eb329 [SPARK-47965][SQL][FOLLOW-UP] Uses `null` as its default
value for `OptionalConfigEntry`
1b966d2eb329 is described below
commit 1b966d2eb329eed45b258d2134aacc0ea62d75dd
Author: Hyukjin Kwon <gurwls...@apache.org>
AuthorDate: Wed May 8 19:18:06 2024 +0900
[SPARK-47965][SQL][FOLLOW-UP] Uses `null` as its default value for
`OptionalConfigEntry`
### What changes were proposed in this pull request?
This PR partially reverts https://github.com/apache/spark/pull/46197
because of the behaviour change below:
```python
>>> spark.conf.get("spark.sql.optimizer.excludedRules")
'<undefined>'
```
### Why are the changes needed?
To avoid behaviour change.
### Does this PR introduce _any_ user-facing change?
No, the main change has not been released out yet.
### How was this patch tested?
Manually as described above.
### Was this patch authored or co-authored using generative AI tooling?
No.
Closes #46472 from HyukjinKwon/SPARK-47965-followup.
Authored-by: Hyukjin Kwon <gurwls...@apache.org>
Signed-off-by: Hyukjin Kwon <gurwls...@apache.org>
---
core/src/main/scala/org/apache/spark/internal/config/ConfigEntry.scala | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git
a/core/src/main/scala/org/apache/spark/internal/config/ConfigEntry.scala
b/core/src/main/scala/org/apache/spark/internal/config/ConfigEntry.scala
index c07f2528ee70..a295ef06a637 100644
--- a/core/src/main/scala/org/apache/spark/internal/config/ConfigEntry.scala
+++ b/core/src/main/scala/org/apache/spark/internal/config/ConfigEntry.scala
@@ -227,7 +227,7 @@ private[spark] class OptionalConfigEntry[T](
prependSeparator,
alternatives,
s => Some(rawValueConverter(s)),
- v => v.map(rawStringConverter).getOrElse(ConfigEntry.UNDEFINED),
+ v => v.map(rawStringConverter).orNull,
doc,
isPublic,
version
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