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author | Cheng Hao <hao.cheng@intel.com> | 2015-09-08 16:16:50 -0700 |
---|---|---|
committer | Michael Armbrust <michael@databricks.com> | 2015-09-08 16:16:50 -0700 |
commit | d637a666d5932002c8ce0bd23c06064fbfdc1c97 (patch) | |
tree | 26b3e93d52601deaa88b8b2603539e1495780d5d /sql/catalyst/src | |
parent | 52b24a602ad615a7f6aa427aefb1c7444c05d298 (diff) | |
download | spark-d637a666d5932002c8ce0bd23c06064fbfdc1c97.tar.gz spark-d637a666d5932002c8ce0bd23c06064fbfdc1c97.tar.bz2 spark-d637a666d5932002c8ce0bd23c06064fbfdc1c97.zip |
[SPARK-10327] [SQL] Cache Table is not working while subquery has alias in its project list
```scala
import org.apache.spark.sql.hive.execution.HiveTableScan
sql("select key, value, key + 1 from src").registerTempTable("abc")
cacheTable("abc")
val sparkPlan = sql(
"""select a.key, b.key, c.key from
|abc a join abc b on a.key=b.key
|join abc c on a.key=c.key""".stripMargin).queryExecution.sparkPlan
assert(sparkPlan.collect { case e: InMemoryColumnarTableScan => e }.size === 3) // failed
assert(sparkPlan.collect { case e: HiveTableScan => e }.size === 0) // failed
```
The actual plan is:
```
== Parsed Logical Plan ==
'Project [unresolvedalias('a.key),unresolvedalias('b.key),unresolvedalias('c.key)]
'Join Inner, Some(('a.key = 'c.key))
'Join Inner, Some(('a.key = 'b.key))
'UnresolvedRelation [abc], Some(a)
'UnresolvedRelation [abc], Some(b)
'UnresolvedRelation [abc], Some(c)
== Analyzed Logical Plan ==
key: int, key: int, key: int
Project [key#14,key#61,key#66]
Join Inner, Some((key#14 = key#66))
Join Inner, Some((key#14 = key#61))
Subquery a
Subquery abc
Project [key#14,value#15,(key#14 + 1) AS _c2#16]
MetastoreRelation default, src, None
Subquery b
Subquery abc
Project [key#61,value#62,(key#61 + 1) AS _c2#58]
MetastoreRelation default, src, None
Subquery c
Subquery abc
Project [key#66,value#67,(key#66 + 1) AS _c2#63]
MetastoreRelation default, src, None
== Optimized Logical Plan ==
Project [key#14,key#61,key#66]
Join Inner, Some((key#14 = key#66))
Project [key#14,key#61]
Join Inner, Some((key#14 = key#61))
Project [key#14]
InMemoryRelation [key#14,value#15,_c2#16], true, 10000, StorageLevel(true, true, false, true, 1), (Project [key#14,value#15,(key#14 + 1) AS _c2#16]), Some(abc)
Project [key#61]
MetastoreRelation default, src, None
Project [key#66]
MetastoreRelation default, src, None
== Physical Plan ==
TungstenProject [key#14,key#61,key#66]
BroadcastHashJoin [key#14], [key#66], BuildRight
TungstenProject [key#14,key#61]
BroadcastHashJoin [key#14], [key#61], BuildRight
ConvertToUnsafe
InMemoryColumnarTableScan [key#14], (InMemoryRelation [key#14,value#15,_c2#16], true, 10000, StorageLevel(true, true, false, true, 1), (Project [key#14,value#15,(key#14 + 1) AS _c2#16]), Some(abc))
ConvertToUnsafe
HiveTableScan [key#61], (MetastoreRelation default, src, None)
ConvertToUnsafe
HiveTableScan [key#66], (MetastoreRelation default, src, None)
```
Author: Cheng Hao <hao.cheng@intel.com>
Closes #8494 from chenghao-intel/weird_cache.
Diffstat (limited to 'sql/catalyst/src')
-rw-r--r-- | sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/LogicalPlan.scala | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/LogicalPlan.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/LogicalPlan.scala index 9bb466ac2d..8f8747e105 100644 --- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/LogicalPlan.scala +++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/LogicalPlan.scala @@ -135,16 +135,25 @@ abstract class LogicalPlan extends QueryPlan[LogicalPlan] with Logging { /** Args that have cleaned such that differences in expression id should not affect equality */ protected lazy val cleanArgs: Seq[Any] = { val input = children.flatMap(_.output) + def cleanExpression(e: Expression) = e match { + case a: Alias => + // As the root of the expression, Alias will always take an arbitrary exprId, we need + // to erase that for equality testing. + val cleanedExprId = Alias(a.child, a.name)(ExprId(-1), a.qualifiers) + BindReferences.bindReference(cleanedExprId, input, allowFailures = true) + case other => BindReferences.bindReference(other, input, allowFailures = true) + } + productIterator.map { // Children are checked using sameResult above. case tn: TreeNode[_] if containsChild(tn) => null - case e: Expression => BindReferences.bindReference(e, input, allowFailures = true) + case e: Expression => cleanExpression(e) case s: Option[_] => s.map { - case e: Expression => BindReferences.bindReference(e, input, allowFailures = true) + case e: Expression => cleanExpression(e) case other => other } case s: Seq[_] => s.map { - case e: Expression => BindReferences.bindReference(e, input, allowFailures = true) + case e: Expression => cleanExpression(e) case other => other } case other => other |