[SPARK-1669][SQL] Made cacheTable idempotent #1183
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asfgit
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Jun 23, 2014
JIRA issue: [SPARK-1669](https://issues.apache.org/jira/browse/SPARK-1669) Caching the same table multiple times should end up with only 1 in-memory columnar representation of this table. Before: ``` scala> loadTestTable("src") ... scala> cacheTable("src") ... scala> cacheTable("src") ... scala> table("src") ... == Query Plan == InMemoryColumnarTableScan [key#2,value#3], (InMemoryRelation [key#2,value#3], false, (InMemoryColumnarTableScan [key#2,value#3], (InMemoryRelation [key#2,value#3], false, (HiveTableScan [key#2,value#3], (MetastoreRelation default, src, None), None)))) ``` After: ``` scala> loadTestTable("src") ... scala> cacheTable("src") ... scala> cacheTable("src") ... scala> table("src") ... == Query Plan == InMemoryColumnarTableScan [key#2,value#3], (InMemoryRelation [key#2,value#3], false, (HiveTableScan [key#2,value#3], (MetastoreRelation default, src, None), None)) ``` Author: Cheng Lian <[email protected]> Closes #1183 from liancheng/spark-1669 and squashes the following commits: 68f8a20 [Cheng Lian] Removed an unused import 51bae90 [Cheng Lian] Made cacheTable idempotent (cherry picked from commit a4bc442) Signed-off-by: Michael Armbrust <[email protected]>
pdeyhim
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Jun 25, 2014
JIRA issue: [SPARK-1669](https://issues.apache.org/jira/browse/SPARK-1669) Caching the same table multiple times should end up with only 1 in-memory columnar representation of this table. Before: ``` scala> loadTestTable("src") ... scala> cacheTable("src") ... scala> cacheTable("src") ... scala> table("src") ... == Query Plan == InMemoryColumnarTableScan [key#2,value#3], (InMemoryRelation [key#2,value#3], false, (InMemoryColumnarTableScan [key#2,value#3], (InMemoryRelation [key#2,value#3], false, (HiveTableScan [key#2,value#3], (MetastoreRelation default, src, None), None)))) ``` After: ``` scala> loadTestTable("src") ... scala> cacheTable("src") ... scala> cacheTable("src") ... scala> table("src") ... == Query Plan == InMemoryColumnarTableScan [key#2,value#3], (InMemoryRelation [key#2,value#3], false, (HiveTableScan [key#2,value#3], (MetastoreRelation default, src, None), None)) ``` Author: Cheng Lian <[email protected]> Closes apache#1183 from liancheng/spark-1669 and squashes the following commits: 68f8a20 [Cheng Lian] Removed an unused import 51bae90 [Cheng Lian] Made cacheTable idempotent
ahirreddy
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Jul 1, 2014
JIRA issue: [SPARK-1669](https://issues.apache.org/jira/browse/SPARK-1669) Caching the same table multiple times should end up with only 1 in-memory columnar representation of this table. Before: ``` scala> loadTestTable("src") ... scala> cacheTable("src") ... scala> cacheTable("src") ... scala> table("src") ... == Query Plan == InMemoryColumnarTableScan [key#2,value#3], (InMemoryRelation [key#2,value#3], false, (InMemoryColumnarTableScan [key#2,value#3], (InMemoryRelation [key#2,value#3], false, (HiveTableScan [key#2,value#3], (MetastoreRelation default, src, None), None)))) ``` After: ``` scala> loadTestTable("src") ... scala> cacheTable("src") ... scala> cacheTable("src") ... scala> table("src") ... == Query Plan == InMemoryColumnarTableScan [key#2,value#3], (InMemoryRelation [key#2,value#3], false, (HiveTableScan [key#2,value#3], (MetastoreRelation default, src, None), None)) ``` Author: Cheng Lian <[email protected]> Closes apache#1183 from liancheng/spark-1669 and squashes the following commits: 68f8a20 [Cheng Lian] Removed an unused import 51bae90 [Cheng Lian] Made cacheTable idempotent
xiliu82
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Sep 4, 2014
JIRA issue: [SPARK-1669](https://issues.apache.org/jira/browse/SPARK-1669) Caching the same table multiple times should end up with only 1 in-memory columnar representation of this table. Before: ``` scala> loadTestTable("src") ... scala> cacheTable("src") ... scala> cacheTable("src") ... scala> table("src") ... == Query Plan == InMemoryColumnarTableScan [key#2,value#3], (InMemoryRelation [key#2,value#3], false, (InMemoryColumnarTableScan [key#2,value#3], (InMemoryRelation [key#2,value#3], false, (HiveTableScan [key#2,value#3], (MetastoreRelation default, src, None), None)))) ``` After: ``` scala> loadTestTable("src") ... scala> cacheTable("src") ... scala> cacheTable("src") ... scala> table("src") ... == Query Plan == InMemoryColumnarTableScan [key#2,value#3], (InMemoryRelation [key#2,value#3], false, (HiveTableScan [key#2,value#3], (MetastoreRelation default, src, None), None)) ``` Author: Cheng Lian <[email protected]> Closes apache#1183 from liancheng/spark-1669 and squashes the following commits: 68f8a20 [Cheng Lian] Removed an unused import 51bae90 [Cheng Lian] Made cacheTable idempotent
wangyum
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May 26, 2023
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JIRA issue: SPARK-1669
Caching the same table multiple times should end up with only 1 in-memory columnar representation of this table.
Before:
After: