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[GitHub] [spark] gengliangwang opened a new pull request #31143: [SPARK-28646][SQL][FOLLOWUP] Add legacy config for allowing parameterless count
gengliangwang opened a new pull request #31143:
URL: https://github.com/apache/spark/pull/31143
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### What changes were proposed in this pull request?
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Add a legacy configuration `spark.sql.legacy.allowParameterlessCount` in case users need the parameterless count.
This is a follow-up for https://github.com/apache/spark/pull/30541.
### Why are the changes needed?
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There can be some users depends on the legacy behavior. We need a legacy flag for it.
### Does this PR introduce _any_ user-facing change?
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Yes, adding a legacy flag `spark.sql.legacy.allowParameterlessCount`.
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Unit tests
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[GitHub] [spark] SparkQA commented on pull request #31143: [SPARK-28646][SQL][FOLLOWUP] Add legacy config for allowing parameterless count
Posted by GitBox <gi...@apache.org>.
SparkQA commented on pull request #31143:
URL: https://github.com/apache/spark/pull/31143#issuecomment-758432997
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[GitHub] [spark] gengliangwang commented on pull request #31143: [SPARK-28646][SQL][FOLLOWUP] Add legacy config for allowing parameterless count
Posted by GitBox <gi...@apache.org>.
gengliangwang commented on pull request #31143:
URL: https://github.com/apache/spark/pull/31143#issuecomment-758402540
cc @beliefer @cloud-fan @HyukjinKwon
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[GitHub] [spark] HyukjinKwon commented on a change in pull request #31143: [SPARK-28646][SQL][FOLLOWUP] Add legacy config for allowing parameterless count
Posted by GitBox <gi...@apache.org>.
HyukjinKwon commented on a change in pull request #31143:
URL: https://github.com/apache/spark/pull/31143#discussion_r555519355
##########
File path: sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala
##########
@@ -1551,6 +1551,14 @@ object SQLConf {
"must be positive.")
.createWithDefault(100)
+ val ALLOW_PARAMETERLESS_COUNT =
+ buildConf("spark.sql.legacy.allowParameterlessCount")
+ .internal()
+ .doc("When true, the SQL function `Count` is allowed to take no parameters.")
Review comment:
```suggestion
.doc("When true, the SQL function 'count' is allowed to take no parameters.")
```
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URL: https://github.com/apache/spark/pull/31143#issuecomment-758434913
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[GitHub] [spark] HyukjinKwon closed pull request #31143: [SPARK-28646][SQL][FOLLOWUP] Add legacy config for allowing parameterless count
Posted by GitBox <gi...@apache.org>.
HyukjinKwon closed pull request #31143:
URL: https://github.com/apache/spark/pull/31143
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[GitHub] [spark] beliefer commented on pull request #31143: [SPARK-28646][SQL][FOLLOWUP] Add legacy config for allowing parameterless count
Posted by GitBox <gi...@apache.org>.
beliefer commented on pull request #31143:
URL: https://github.com/apache/spark/pull/31143#issuecomment-758405277
LGTM. I left one comment.
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[GitHub] [spark] SparkQA commented on pull request #31143: [SPARK-28646][SQL][FOLLOWUP] Add legacy config for allowing parameterless count
Posted by GitBox <gi...@apache.org>.
SparkQA commented on pull request #31143:
URL: https://github.com/apache/spark/pull/31143#issuecomment-758416093
**[Test build #133959 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/133959/testReport)** for PR 31143 at commit [`1c08d37`](https://github.com/apache/spark/commit/1c08d3725393b6086db1926d9131d61c83d02c54).
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Posted by GitBox <gi...@apache.org>.
SparkQA commented on pull request #31143:
URL: https://github.com/apache/spark/pull/31143#issuecomment-758566467
**[Test build #133959 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/133959/testReport)** for PR 31143 at commit [`1c08d37`](https://github.com/apache/spark/commit/1c08d3725393b6086db1926d9131d61c83d02c54).
* This patch passes all tests.
* This patch merges cleanly.
* This patch adds no public classes.
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[GitHub] [spark] beliefer commented on a change in pull request #31143: [SPARK-28646][SQL][FOLLOWUP] Add legacy config for allowing parameterless count
Posted by GitBox <gi...@apache.org>.
beliefer commented on a change in pull request #31143:
URL: https://github.com/apache/spark/pull/31143#discussion_r555516927
##########
File path: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Count.scala
##########
@@ -51,8 +52,11 @@ case class Count(children: Seq[Expression]) extends DeclarativeAggregate {
override def dataType: DataType = LongType
override def checkInputDataTypes(): TypeCheckResult = {
- if (children.isEmpty) {
- TypeCheckResult.TypeCheckFailure(s"$prettyName requires at least one argument.")
+ val conf = SQLConf.get
+ if (children.isEmpty && !conf.getConf(SQLConf.ALLOW_PARAMETERLESS_COUNT)) {
Review comment:
`if (children.isEmpty && !SQLConf.get.getConf(SQLConf.ALLOW_PARAMETERLESS_COUNT)) {`
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[GitHub] [spark] HyukjinKwon commented on pull request #31143: [SPARK-28646][SQL][FOLLOWUP] Add legacy config for allowing parameterless count
Posted by GitBox <gi...@apache.org>.
HyukjinKwon commented on pull request #31143:
URL: https://github.com/apache/spark/pull/31143#issuecomment-758465344
Merged to master and branch-3.1.
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