[
https://issues.apache.org/jira/browse/DRILL-2385?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15368194#comment-15368194
]
Chun Chang commented on DRILL-2385:
-----------------------------------
Verified fix with:
{noformat}
0: jdbc:drill:schema=dfs.drillTestDir> select * from sys.version;
+-----------------+-------------------------------------------+-----------------------------------------------------------------------------------------------------------------+----------------------------+---------------------+----------------------------+
| version | commit_id |
commit_message
| commit_time | build_email |
build_time |
+-----------------+-------------------------------------------+-----------------------------------------------------------------------------------------------------------------+----------------------------+---------------------+----------------------------+
| 1.8.0-SNAPSHOT | 05c42eae79ce3e309028b3824f9449b98e329f29 | DRILL-4707: Fix
memory leak or incorrect query result in case two column names are
case-insensitive identical. | 29.06.2016 @ 08:15:13 PDT | inram...@gmail.com
| 07.07.2016 @ 10:50:40 PDT |
+-----------------+-------------------------------------------+-----------------------------------------------------------------------------------------------------------------+----------------------------+---------------------+----------------------------+
1 row selected (0.44 seconds)
0: jdbc:drill:schema=dfs.drillTestDir> use dfs.drillTestDirComplexJson;
+-------+----------------------------------------------------------+
| ok | summary |
+-------+----------------------------------------------------------+
| true | Default schema changed to [dfs.drillTestDirComplexJson] |
+-------+----------------------------------------------------------+
1 row selected (0.478 seconds)
0: jdbc:drill:schema=dfs.drillTestDir> select t.sia from `complex.json` t limit
1;
+------------------+
| sia |
+------------------+
| [1,11,101,1001] |
+------------------+
1 row selected (0.363 seconds)
0: jdbc:drill:schema=dfs.drillTestDir> select t.gbyi, count(t.sia) countsia
from `complex.json` t group by t.gbyi;
+-------+-----------+
| gbyi | countsia |
+-------+-----------+
| 1 | 6667 |
| 2 | 6667 |
| 3 | 6667 |
| 4 | 6667 |
| 5 | 6667 |
| 6 | 6667 |
| 7 | 6667 |
| 8 | 6667 |
| 9 | 6667 |
| 10 | 6667 |
| 11 | 6666 |
| 12 | 6666 |
| 13 | 6666 |
| 14 | 6666 |
| 15 | 6666 |
+-------+-----------+
15 rows selected (1.693 seconds)
{noformat}
> count on complex objects failed with missing function implementation
> --------------------------------------------------------------------
>
> Key: DRILL-2385
> URL: https://issues.apache.org/jira/browse/DRILL-2385
> Project: Apache Drill
> Issue Type: Bug
> Components: Functions - Drill
> Affects Versions: 0.8.0
> Reporter: Chun Chang
> Assignee: Vitalii Diravka
> Priority: Minor
> Fix For: 1.7.0
>
>
> #Wed Mar 04 01:23:42 EST 2015
> git.commit.id.abbrev=71b6bfe
> Have a complex type looks like the following:
> {code}
> 0: jdbc:drill:schema=dfs.drillTestDirComplexJ> select t.sia from
> `complex.json` t limit 1;
> +------------+
> | sia |
> +------------+
> | [1,11,101,1001] |
> +------------+
> {code}
> A count on the complex type will fail with missing function implementation:
> {code}
> 0: jdbc:drill:schema=dfs.drillTestDirComplexJ> select t.gbyi, count(t.sia)
> countsia from `complex.json` t group by t.gbyi;
> Query failed: RemoteRpcException: Failure while running fragment., Schema is
> currently null. You must call buildSchema(SelectionVectorMode) before this
> container can return a schema. [ 12856530-3133-45be-bdf4-ef8cc784f7b3 on
> qa-node119.qa.lab:31010 ]
> [ 12856530-3133-45be-bdf4-ef8cc784f7b3 on qa-node119.qa.lab:31010 ]
> Error: exception while executing query: Failure while executing query.
> (state=,code=0)
> {code}
> drillbit.log
> {code}
> 2015-03-04 13:44:51,383 [2b08832b-9247-e90c-785d-751f02fc1548:frag:2:0] ERROR
> o.a.drill.exec.ops.FragmentContext - Fragment Context received failure.
> org.apache.drill.exec.exception.SchemaChangeException: Failure while
> materializing expression.
> Error in expression at index 0. Error: Missing function implementation:
> [count(BIGINT-REPEATED)]. Full expression: null.
> at
> org.apache.drill.exec.physical.impl.aggregate.HashAggBatch.createAggregatorInternal(HashAggBatch.java:210)
> [drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
> at
> org.apache.drill.exec.physical.impl.aggregate.HashAggBatch.createAggregator(HashAggBatch.java:158)
> [drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
> at
> org.apache.drill.exec.physical.impl.aggregate.HashAggBatch.buildSchema(HashAggBatch.java:101)
> [drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
> at
> org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:130)
> [drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
> at
> org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:118)
> [drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
> at
> org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:67)
> [drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
> at
> org.apache.drill.exec.physical.impl.partitionsender.PartitionSenderRootExec.innerNext(PartitionSenderRootExec.java:114)
> [drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
> at
> org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:57)
> [drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
> at
> org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:121)
> [drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
> at
> org.apache.drill.exec.work.WorkManager$RunnableWrapper.run(WorkManager.java:303)
> [drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> [na:1.7.0_45]
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> [na:1.7.0_45]
> at java.lang.Thread.run(Thread.java:744) [na:1.7.0_45]
> 2015-03-04 13:44:51,383 [2b08832b-9247-e90c-785d-751f02fc1548:frag:2:0] WARN
> o.a.d.e.w.fragment.FragmentExecutor - Error while initializing or executing
> fragment
> java.lang.NullPointerException: Schema is currently null. You must call
> buildSchema(SelectionVectorMode) before this container can return a schema.
> at
> com.google.common.base.Preconditions.checkNotNull(Preconditions.java:208)
> ~[guava-14.0.1.jar:na]
> at
> org.apache.drill.exec.record.VectorContainer.getSchema(VectorContainer.java:261)
> ~[drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
> at
> org.apache.drill.exec.record.AbstractRecordBatch.getSchema(AbstractRecordBatch.java:155)
> ~[drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
> at
> org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.getSchema(IteratorValidatorBatchIterator.java:75)
> ~[drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
> at
> org.apache.drill.exec.physical.impl.partitionsender.PartitionSenderRootExec.sendEmptyBatch(PartitionSenderRootExec.java:276)
> ~[drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
> at
> org.apache.drill.exec.physical.impl.partitionsender.PartitionSenderRootExec.innerNext(PartitionSenderRootExec.java:131)
> ~[drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
> at
> org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:57)
> ~[drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
> at
> org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:121)
> ~[drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
> at
> org.apache.drill.exec.work.WorkManager$RunnableWrapper.run(WorkManager.java:303)
> [drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> [na:1.7.0_45]
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> [na:1.7.0_45]
> at java.lang.Thread.run(Thread.java:744) [na:1.7.0_45]
> {code}
> physical plan:
> {code}
> 0: jdbc:drill:schema=dfs.drillTestDirComplexJ> explain plan for select
> t.gbyi, count(t.sia) countsia from `complex.json` t group by t.gbyi;
> +------------+------------+
> | text | json |
> +------------+------------+
> | 00-00 Screen
> 00-01 Project(gbyi=[$0], countsia=[$1])
> 00-02 UnionExchange
> 01-01 HashAgg(group=[{0}], countsia=[$SUM0($1)])
> 01-02 HashToRandomExchange(dist0=[[$0]])
> 02-01 HashAgg(group=[{0}], countsia=[COUNT($1)])
> 02-02 Project(gbyi=[$1], sia=[$0])
> 02-03 Scan(groupscan=[EasyGroupScan
> [selectionRoot=/drill/testdata/complex_type/json/complex.json, numFiles=1,
> columns=[`gbyi`, `sia`],
> files=[maprfs:/drill/testdata/complex_type/json/complex.json]]])
> {code}
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