[DRILL-2385] count on complex objects failed with missing function implementation

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.8.0
• Fix Version/s: 1.7.0
• Component/s: Functions - Drill
• Assignee: Vitalii Diravka
• Reporter: Chun Chang
• Reviewer: Chun Chang
• Created: 04/Mar/15 21:59
• Updated: 08/Jul/16 21:22
• Resolved: 21/Jun/16 13:41

Description

#Wed Mar 04 01:23:42 EST 2015
git.commit.id.abbrev=71b6bfe

Have a complex type looks like the following:

0: jdbc:drill:schema=dfs.drillTestDirComplexJ> select t.sia from `complex.json` t limit 1;
+------------+
|    sia     |
+------------+
| [1,11,101,1001] |
+------------+

A count on the complex type will fail with missing function implementation:

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)

drillbit.log

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]

physical plan:

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]]])

Issue Links

• duplicates: DRILL-1650 Add support for repeated_count multi-level array data type?
• is related to: DRILL-4664 ScanBatch.isNewSchema() returns wrong result for map datatype
• links to: GitHub Pull Request #501