[SPARK-32282][SQL] Improve EnsureRquirement.reorderJoinKeys to handle more scenarios such as PartitioningCollection by imback82 · Pull Request #29074 · apache/spark

imback82 · 2020-07-12T02:59:14Z

What changes were proposed in this pull request?

This PR proposes to improve EnsureRquirement.reorderJoinKeys to handle the following scenarios:

If the keys cannot be reordered to match the left-side HashPartitioning, consider the right-side HashPartitioning.
Handle PartitioningCollection, which may contain HashPartitioning

Why are the changes needed?

For the scenario 1), the current behavior matches either the left-side HashPartitioning or the right-side HashPartitioning. This means that if both sides are HashPartitioning, it will try to match only the left side.
The following will not consider the right-side HashPartitioning:

val df1 = (0 until 10).map(i => (i % 5, i % 13)).toDF("i1", "j1")
val df2 = (0 until 10).map(i => (i % 7, i % 11)).toDF("i2", "j2")
df1.write.format("parquet").bucketBy(4, "i1", "j1").saveAsTable("t1")df2.write.format("parquet").bucketBy(4, "i2", "j2").saveAsTable("t2")
val t1 = spark.table("t1")
val t2 = spark.table("t2")
val join = t1.join(t2, t1("i1") === t2("j2") && t1("i1") === t2("i2"))
join.explain
== Physical Plan ==
*(5) SortMergeJoin [i1#26, i1#26], [j2#31, i2#30], Inner
:- *(2) Sort [i1#26 ASC NULLS FIRST, i1#26 ASC NULLS FIRST], false, 0
: +- Exchange hashpartitioning(i1#26, i1#26, 4), true, [id=#69]
: +- *(1) Project [i1#26, j1#27]
: +- *(1) Filter isnotnull(i1#26)
: +- *(1) ColumnarToRow
: +- FileScan parquet default.t1[i1#26,j1#27] Batched: true, DataFilters: [isnotnull(i1#26)], Format: Parquet, Location: InMemoryFileIndex[..., PartitionFilters: [], PushedFilters: [IsNotNull(i1)], ReadSchema: struct<i1:int,j1:int>, SelectedBucketsCount: 4 out of 4
+- *(4) Sort [j2#31 ASC NULLS FIRST, i2#30 ASC NULLS FIRST], false, 0.
+- Exchange hashpartitioning(j2#31, i2#30, 4), true, [id=#79]. <===== This can be removed
+- *(3) Project [i2#30, j2#31]
+- *(3) Filter (((j2#31 = i2#30) AND isnotnull(j2#31)) AND isnotnull(i2#30))
+- *(3) ColumnarToRow
+- FileScan parquet default.t2[i2#30,j2#31] Batched: true, DataFilters: [(j2#31 = i2#30), isnotnull(j2#31), isnotnull(i2#30)], Format: Parquet, Location: InMemoryFileIndex[..., PartitionFilters: [], PushedFilters: [IsNotNull(j2), IsNotNull(i2)], ReadSchema: struct<i2:int,j2:int>, SelectedBucketsCount: 4 out of 4

For the scenario 2), the current behavior does not handle PartitioningCollection:

val df1 = (0 until 100).map(i => (i % 5, i % 13)).toDF("i1", "j1")
val df2 = (0 until 100).map(i => (i % 7, i % 11)).toDF("i2", "j2")
val df3 = (0 until 100).map(i => (i % 5, i % 13)).toDF("i3", "j3")
val join = df1.join(df2, df1("i1") === df2("i2") && df1("j1") === df2("j2")) // PartitioningCollection
val join2 = join.join(df3, join("j1") === df3("j3") && join("i1") === df3("i3"))
join2.explain
== Physical Plan ==
*(9) SortMergeJoin [j1#8, i1#7], [j3#30, i3#29], Inner
:- *(6) Sort [j1#8 ASC NULLS FIRST, i1#7 ASC NULLS FIRST], false, 0. <===== This can be removed
: +- Exchange hashpartitioning(j1#8, i1#7, 5), true, [id=#58] <===== This can be removed
: +- *(5) SortMergeJoin [i1#7, j1#8], [i2#18, j2#19], Inner
: :- *(2) Sort [i1#7 ASC NULLS FIRST, j1#8 ASC NULLS FIRST], false, 0
: : +- Exchange hashpartitioning(i1#7, j1#8, 5), true, [id=#45]
: : +- *(1) Project [_1#2 AS i1#7, _2#3 AS j1#8]
: : +- *(1) LocalTableScan [_1#2, _2#3]
: +- *(4) Sort [i2#18 ASC NULLS FIRST, j2#19 ASC NULLS FIRST], false, 0
: +- Exchange hashpartitioning(i2#18, j2#19, 5), true, [id=#51]
: +- *(3) Project [_1#13 AS i2#18, _2#14 AS j2#19]
: +- *(3) LocalTableScan [_1#13, _2#14]
+- *(8) Sort [j3#30 ASC NULLS FIRST, i3#29 ASC NULLS FIRST], false, 0
+- Exchange hashpartitioning(j3#30, i3#29, 5), true, [id=#64]
+- *(7) Project [_1#24 AS i3#29, _2#25 AS j3#30]
+- *(7) LocalTableScan [_1#24, _2#25]

Does this PR introduce any user-facing change?

Yes, now from the above examples, the shuffle/sort nodes pointed by This can be removed are now removed:

Senario 1):

== Physical Plan ==
*(4) SortMergeJoin [i1#26, i1#26], [i2#30, j2#31], Inner
:- *(2) Sort [i1#26 ASC NULLS FIRST, i1#26 ASC NULLS FIRST], false, 0
: +- Exchange hashpartitioning(i1#26, i1#26, 4), true, [id=#67]
: +- *(1) Project [i1#26, j1#27]
: +- *(1) Filter isnotnull(i1#26)
: +- *(1) ColumnarToRow
: +- FileScan parquet default.t1[i1#26,j1#27] Batched: true, DataFilters: [isnotnull(i1#26)], Format: Parquet, Location: InMemoryFileIndex[..., PartitionFilters: [], PushedFilters: [IsNotNull(i1)], ReadSchema: struct<i1:int,j1:int>, SelectedBucketsCount: 4 out of 4
+- *(3) Sort [i2#30 ASC NULLS FIRST, j2#31 ASC NULLS FIRST], false, 0
+- *(3) Project [i2#30, j2#31]
+- *(3) Filter (((j2#31 = i2#30) AND isnotnull(j2#31)) AND isnotnull(i2#30))
+- *(3) ColumnarToRow
+- FileScan parquet default.t2[i2#30,j2#31] Batched: true, DataFilters: [(j2#31 = i2#30), isnotnull(j2#31), isnotnull(i2#30)], Format: Parquet, Location: InMemoryFileIndex[..., PartitionFilters: [], PushedFilters: [IsNotNull(j2), IsNotNull(i2)], ReadSchema: struct<i2:int,j2:int>, SelectedBucketsCount: 4 out of 4

Scenario 2):

== Physical Plan ==
*(8) SortMergeJoin [i1#7, j1#8], [i3#29, j3#30], Inner
:- *(5) SortMergeJoin [i1#7, j1#8], [i2#18, j2#19], Inner
: :- *(2) Sort [i1#7 ASC NULLS FIRST, j1#8 ASC NULLS FIRST], false, 0
: : +- Exchange hashpartitioning(i1#7, j1#8, 5), true, [id=#43]
: : +- *(1) Project [_1#2 AS i1#7, _2#3 AS j1#8]
: : +- *(1) LocalTableScan [_1#2, _2#3]
: +- *(4) Sort [i2#18 ASC NULLS FIRST, j2#19 ASC NULLS FIRST], false, 0
: +- Exchange hashpartitioning(i2#18, j2#19, 5), true, [id=#49]
: +- *(3) Project [_1#13 AS i2#18, _2#14 AS j2#19]
: +- *(3) LocalTableScan [_1#13, _2#14]
+- *(7) Sort [i3#29 ASC NULLS FIRST, j3#30 ASC NULLS FIRST], false, 0
+- Exchange hashpartitioning(i3#29, j3#30, 5), true, [id=#58]
+- *(6) Project [_1#24 AS i3#29, _2#25 AS j3#30]
+- *(6) LocalTableScan [_1#24, _2#25]

How was this patch tested?

Added tests.

imback82 · 2020-07-12T03:22:02Z

+ leftKeys, rightKeys, UnknownPartitioning(0), rightPartitioning))
+ case (_, HashPartitioning(rightExpressions, _)) =>
+ reorder(leftKeys.toIndexedSeq, rightKeys.toIndexedSeq, rightExpressions, rightKeys)
+ .orElse(reorderJoinKeysRecursively(


This can be also implemented by looking at left partitioning first then move to the right partitionoing:
(leftPartitioning, rightPartitioning) match { case (HashPartitioning(leftExpressions, _), _) => reorder(leftKeys.toIndexedSeq, rightKeys.toIndexedSeq, leftExpressions, leftKeys) .orElse(reorderJoinKeysRecursively( leftKeys, rightKeys, UnknownPartitioning(0), rightPartitioning)) case (PartitioningCollection(partitionings), _) => partitionings.foreach { p => reorderJoinKeysRecursively(leftKeys, rightKeys, p, rightPartitioning).map { k =>returnSome(k) } } reorderJoinKeysRecursively(leftKeys, rightKeys, UnknownPartitioning(0), rightPartitioning) case (_, HashPartitioning(rightExpressions, _)) => reorder(leftKeys.toIndexedSeq, rightKeys.toIndexedSeq, rightExpressions, rightKeys) case (_, PartitioningCollection(partitionings)) => partitionings.foreach { p => reorderJoinKeysRecursively(leftKeys, rightKeys, leftPartitioning, p).map { k =>returnSome(k) } } Nonecase _ =>None }
However, I chose this way so that the behavior remains the same. If you have leftPartitioning = PartitioningCollection and rightPartitioning = HashPartitioning, it will match the rightPartitioning first, which is the existing behavior.

SparkQA · 2020-07-12T07:05:02Z

Test build #125704 has finished for PR 29074 at commit 99493e4.

This patch fails due to an unknown error code, -9.
This patch merges cleanly.
This patch adds no public classes.

imback82 · 2020-07-12T18:09:24Z

retest this please

SparkQA · 2020-07-12T23:49:43Z

Test build #125722 has finished for PR 29074 at commit 99493e4.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

imback82 · 2020-07-13T00:09:40Z

cc: @maropu @cloud-fan

maropu · 2020-07-13T00:44:04Z

also cc: @viirya

SparkQA · 2020-07-15T16:22:03Z

Test build #125890 has finished for PR 29074 at commit ab237bc.

This patch fails to build.
This patch does not merge cleanly.
This patch adds no public classes.

SparkQA · 2020-07-16T06:59:36Z

Test build #125917 has finished for PR 29074 at commit 8308649.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

imback82 · 2020-07-27T20:32:24Z

Gentle ping @cloud-fan / @maropu / @viirya

SparkQA · 2020-08-02T04:35:17Z

Test build #126928 has finished for PR 29074 at commit 268326b.

This patch fails Spark unit tests.
This patch merges cleanly.
This patch adds no public classes.

SparkQA · 2020-08-07T06:56:57Z

Test build #127164 has finished for PR 29074 at commit e5b078f.

This patch passes all tests.
This patch merges cleanly.
This patch adds the following public classes (experimental):
class EnsureRequirementsSuite extends SharedSparkSession

maropu

Looks okay except for the existing minor comments. @cloud-fan @viirya

SparkQA · 2020-08-07T22:27:46Z

Test build #127213 has finished for PR 29074 at commit 89ad6ef.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

maropu · 2020-08-22T11:25:54Z

retest this please

SparkQA · 2020-08-22T16:16:25Z

Test build #127775 has finished for PR 29074 at commit 89ad6ef.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

c21

Thanks @imback82 for adding this. This is important for complex bucketed-related queries to avoid shuffle. LGTM, just a nit.

SparkQA · 2020-08-24T22:04:02Z

Test build #127850 has finished for PR 29074 at commit 1729c8b.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

imback82 · 2020-08-31T05:33:52Z

Gentle ping. @cloud-fan, do you think this PR can move forward? Thanks in advance!

maropu · 2020-09-09T13:50:59Z

retest this please

SparkQA · 2020-09-09T19:34:17Z

Test build #128455 has finished for PR 29074 at commit 1729c8b.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

maropu · 2020-09-28T12:14:10Z

retest this please

SparkQA · 2020-09-28T13:05:46Z

Kubernetes integration test starting
URL: https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder-K8s/33799/

SparkQA · 2020-09-28T13:30:48Z

Kubernetes integration test status success
URL: https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder-K8s/33799/

SparkQA · 2020-09-28T16:50:13Z

Test build #129183 has finished for PR 29074 at commit 1729c8b.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

cloud-fan · 2020-10-06T15:34:07Z

+ case (Some(PartitioningCollection(partitionings)), _) =>
+ partitionings.foreach { p =>
+ reorderJoinKeysRecursively(leftKeys, rightKeys, Some(p), rightPartitioning).map { k =>
+ return Some(k)


nit:
partitionings.foldLeft(None) { (res, p) => res.orElse(reorderJoinKeysRecursively...) }.getOrElse(reorderJoinKeysRecursively(leftKeys, rightKeys, None, rightPartitioning))

Thanks, updated.

cloud-fan · 2020-10-06T15:36:03Z

+ ShuffleExchangeExec(HashPartitioning(rightPartitioningExpressions, _), _, _), _), _) =>
+ assert(leftKeys !== smjExec1.leftKeys)
+ assert(rightKeys !== smjExec1.rightKeys)
+ assert(leftKeys === leftPartitionings.head.asInstanceOf[HashPartitioning].expressions)


can we simply check leftKeys === Seq(exprA, exprB)?

OK. I simplified the checks in this test.

cloud-fan

LGTM except some minor comments

SparkQA · 2020-10-07T02:28:02Z

Kubernetes integration test starting
URL: https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder-K8s/34089/

SparkQA · 2020-10-07T02:52:08Z

Kubernetes integration test status success
URL: https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder-K8s/34089/

SparkQA · 2020-10-07T06:19:19Z

Test build #129483 has finished for PR 29074 at commit 10b4d5a.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

cloud-fan · 2020-10-07T06:45:33Z

+ res.orElse(reorderJoinKeysRecursively(leftKeys, rightKeys, Some(p), rightPartitioning))
+ }.orElse(reorderJoinKeysRecursively(leftKeys, rightKeys, None, rightPartitioning))
+ case (_, Some(PartitioningCollection(partitionings))) =>
+ partitionings.foreach { p =>


can you do the same refactor here?

cloud-fan · 2020-10-07T06:46:29Z

+ case SortMergeJoinExec(leftKeys, rightKeys, _, _,
+ SortExec(_, _, DummySparkPlan(_, _, _: PartitioningCollection, _, _), _),
+ SortExec(_, _, ShuffleExchangeExec(_: HashPartitioning, _, _), _), _) =>
+ assert(leftKeys !== smjExec1.leftKeys)


is this check needed? We already check leftKeys === Seq(exprA, exprB) and it's obvious that leftKeys !== smjExec1.leftKeys

Removed, thanks!

SparkQA · 2020-10-07T17:40:51Z

Kubernetes integration test starting
URL: https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder-K8s/34128/

SparkQA · 2020-10-07T17:59:21Z

Kubernetes integration test status failure
URL: https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder-K8s/34128/

SparkQA · 2020-10-07T21:11:31Z

Test build #129523 has finished for PR 29074 at commit 3cd6df9.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

cloud-fan · 2020-10-08T04:58:32Z

thanks, merging to master!

imback82 added 2 commits July 11, 2020 19:04

initial commit
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update comments
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probot-autolabelerBot added the SQL label Jul 12, 2020

imback82 changed the title ~~[SPARK-xxx][SQL] Improve EnsureRquirement.reorderJoinKeys to handle more scenarios such as PartitioningCollection~~[SPARK-32282][SQL] Improve EnsureRquirement.reorderJoinKeys to handle more scenarios such as PartitioningCollectionJul 12, 2020

imback82 commented Jul 12, 2020
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Merge branch 'master' into reorder_keys
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Merge branch 'master' into reorder_keys
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imback82 added 2 commits August 6, 2020 13:50

Merge branch 'master' into reorder_keys
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address PR comments
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Comment threadsql/core/src/test/scala/org/apache/spark/sql/execution/exchange/EnsureRequirementsSuite.scala Outdated

imback82 added 2 commits August 24, 2020 10:04

Merge branch 'master' into reorder_keys
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imback82 added 2 commits October 6, 2020 17:21

Merge branch 'master' into reorder_keys
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cloud-fan closed this in 1c781a4Oct 8, 2020

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imback82 commented Jul 12, 2020

What changes were proposed in this pull request?

Why are the changes needed?

Does this PR introduce any user-facing change?

How was this patch tested?

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