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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2022/02/24 10:31:24 UTC
[GitHub] [spark] chenzhx opened a new pull request #35649: [SPARK-37932][SQL]Fix DeduplicateRelations bug when using join in dup…
chenzhx opened a new pull request #35649:
URL: https://github.com/apache/spark/pull/35649
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### What changes were proposed in this pull request?
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When the join with duplicate view like
```
SELECT l1.idFROM v1 l1
INNER JOIN (
SELECT id FROM v1
GROUP BY id HAVING COUNT(DISTINCT name) > 1
) l2
ON l1.id = l2.id
GROUP BY l1.name, l1.id;
```
The error stack is:
```
Resolved attribute(s) name#26 missing from id#31,name#32 in operator !Aggregate [id#31], [id#31, count(distinct name#26) AS count(distinct name#26)#33L]. Attribute(s) with the same name appear in the operation: name. Please check if the right attribute(s) are used.;
Aggregate [name#26, id#25], [id#25]
+- Join Inner, (id#25 = id#31)
:- SubqueryAlias l1
: +- SubqueryAlias spark_catalog.default.v1
: +- View (`default`.`v1`, [id#25,name#26])
: +- Project [cast(id#20 as int) AS id#25, cast(name#21 as string) AS name#26]
: +- Project [id#20, name#21]
: +- SubqueryAlias spark_catalog.default.t
: +- Relation default.t[id#20,name#21] parquet
+- SubqueryAlias l2
+- Project [id#31]
+- Filter (count(distinct name#26)#33L > cast(1 as bigint))
+- !Aggregate [id#31], [id#31, count(distinct name#26) AS count(distinct name#26)#33L]
+- SubqueryAlias spark_catalog.default.v1
+- View (`default`.`v1`, [id#31,name#32])
+- Project [cast(id#27 as int) AS id#31, cast(name#28 as string) AS name#32]
+- Project [id#27, name#28]
+- SubqueryAlias spark_catalog.default.t
+- Relation default.t[id#27,name#28] parquet
```
Spark will consider the two views to be duplicates, which will cause the query to fail. We can add new aliases to attributes in the view to avoid two views from being considered duplicates.
Optimization plan after this change：
```
Aggregate [name#26, id#25], [id#25]
+- Join Inner, (id#25 = id#25)
:- SubqueryAlias l1
: +- SubqueryAlias spark_catalog.default.v1
: +- View (`default`.`v1`, [id#25,name#26])
: +- Project [cast(id#20 as int) AS id#25, cast(name#21 as string) AS name#26]
: +- Project [id#20, name#21]
: +- SubqueryAlias spark_catalog.default.t
: +- Relation default.t[id#20,name#21] parquet
+- SubqueryAlias l2
+- Project [id#25]
+- Filter (count(distinct name#26)#29L > cast(1 as bigint))
+- !Aggregate [id#25], [id#25, count(distinct name#26) AS count(distinct name#26)#33L]
+- SubqueryAlias spark_catalog.default.v1
+- View (`default`.`v1`, [id#25,name#26])
+- Project [cast(id#27 as int) AS id#25, cast(name#28 as string) AS name#26]
+- Project [id#27, name#28]
+- SubqueryAlias spark_catalog.default.t
+- Relation default.t[id#27,name#28] parquet
```
### Why are the changes needed?
<!--
Please clarify why the changes are needed. For instance,
1. If you propose a new API, clarify the use case for a new API.
2. If you fix a bug, you can clarify why it is a bug.
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Fix bug when using join in duplicate views.
### Does this PR introduce _any_ user-facing change?
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Note that it means *any* user-facing change including all aspects such as the documentation fix.
If yes, please clarify the previous behavior and the change this PR proposes - provide the console output, description and/or an example to show the behavior difference if possible.
If possible, please also clarify if this is a user-facing change compared to the released Spark versions or within the unreleased branches such as master.
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Yes. When we join with duplicate view, the query would be successful.
### How was this patch tested?
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Add new UT
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[GitHub] [spark] cloud-fan commented on a change in pull request #35649: [SPARK-37932][SQL]Fix DeduplicateRelations bug when using join in dup…
Posted by GitBox <gi...@apache.org>.
cloud-fan commented on a change in pull request #35649:
URL: https://github.com/apache/spark/pull/35649#discussion_r813855453
##########
File path: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/DeduplicateRelations.scala
##########
@@ -223,6 +223,11 @@ object DeduplicateRelations extends Rule[LogicalPlan] {
if findAliases(aggregateExpressions).size == aggregateExpressions.size =>
Nil
+ case oldVersion @ Filter(condition, _)
+ if condition.references.intersect(left.outputSet).nonEmpty =>
+ val newVersion = oldVersion.copy(condition = condition)
Review comment:
isn't `oldVersion` exactly the same with `newVersion`?
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[GitHub] [spark] beliefer commented on pull request #35649: [SPARK-37932][SQL]Fix DeduplicateRelations bug when using join in dup…
Posted by GitBox <gi...@apache.org>.
beliefer commented on pull request #35649:
URL: https://github.com/apache/spark/pull/35649#issuecomment-1049754471
ping @gengliangwang @MaxGekk cc @cloud-fan
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[GitHub] [spark] chenzhx commented on a change in pull request #35649: [SPARK-37932][SQL]Fix DeduplicateRelations bug when using join in dup…
Posted by GitBox <gi...@apache.org>.
chenzhx commented on a change in pull request #35649:
URL: https://github.com/apache/spark/pull/35649#discussion_r814042311
##########
File path: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/DeduplicateRelations.scala
##########
@@ -223,6 +223,11 @@ object DeduplicateRelations extends Rule[LogicalPlan] {
if findAliases(aggregateExpressions).size == aggregateExpressions.size =>
Nil
+ case oldVersion @ Filter(condition, _)
+ if condition.references.intersect(left.outputSet).nonEmpty =>
+ val newVersion = oldVersion.copy(condition = condition)
Review comment:
It should be written directly as newVersion = oldVersion.copy() ?
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[GitHub] [spark] chenzhx commented on a change in pull request #35649: [SPARK-37932][SQL]Fix DeduplicateRelations bug when using join in dup…
Posted by GitBox <gi...@apache.org>.
chenzhx commented on a change in pull request #35649:
URL: https://github.com/apache/spark/pull/35649#discussion_r813895362
##########
File path: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/DeduplicateRelations.scala
##########
@@ -223,6 +223,11 @@ object DeduplicateRelations extends Rule[LogicalPlan] {
if findAliases(aggregateExpressions).size == aggregateExpressions.size =>
Nil
+ case oldVersion @ Filter(condition, _)
+ if condition.references.intersect(left.outputSet).nonEmpty =>
+ val newVersion = oldVersion.copy(condition = condition)
Review comment:
You mean mean to write directly as Seq(oldVersion, oldVersion) ？
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[GitHub] [spark] cloud-fan commented on a change in pull request #35649: [SPARK-37932][SQL]Fix DeduplicateRelations bug when using join in dup…
Posted by GitBox <gi...@apache.org>.
cloud-fan commented on a change in pull request #35649:
URL: https://github.com/apache/spark/pull/35649#discussion_r813946781
##########
File path: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/DeduplicateRelations.scala
##########
@@ -223,6 +223,11 @@ object DeduplicateRelations extends Rule[LogicalPlan] {
if findAliases(aggregateExpressions).size == aggregateExpressions.size =>
Nil
+ case oldVersion @ Filter(condition, _)
+ if condition.references.intersect(left.outputSet).nonEmpty =>
+ val newVersion = oldVersion.copy(condition = condition)
Review comment:
how does it fix the bug?
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[GitHub] [spark] chenzhx closed pull request #35649: [SPARK-37932][SQL]Fix DeduplicateRelations bug when using join in dup…
Posted by GitBox <gi...@apache.org>.
chenzhx closed pull request #35649:
URL: https://github.com/apache/spark/pull/35649
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[GitHub] [spark] chenzhx commented on a change in pull request #35649: [SPARK-37932][SQL]Fix DeduplicateRelations bug when using join in dup…
Posted by GitBox <gi...@apache.org>.
chenzhx commented on a change in pull request #35649:
URL: https://github.com/apache/spark/pull/35649#discussion_r813895362
##########
File path: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/DeduplicateRelations.scala
##########
@@ -223,6 +223,11 @@ object DeduplicateRelations extends Rule[LogicalPlan] {
if findAliases(aggregateExpressions).size == aggregateExpressions.size =>
Nil
+ case oldVersion @ Filter(condition, _)
+ if condition.references.intersect(left.outputSet).nonEmpty =>
+ val newVersion = oldVersion.copy(condition = condition)
Review comment:
You mean mean to write directly as Seq(oldVersion, oldVersion) ？
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