[DRILL-2119] Drill interpreting a scalar as a map or array in an order by stmt when used with flatten

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.8.0
• Component/s: Execution - Data Types
• Assignee: Mehant Baid
• Reporter: Rahul Kumar Challapalli
• Created: 29/Jan/15 21:19
• Updated: 21/Apr/15 21:20
• Resolved: 19/Mar/15 04:36

Description

git.commit.id.abbrev=3e33880

Data Set :

{
    "uid": 1,
    "map": {
        "rm": [
            {
                "mapid": "m1",
                "mapvalue": {
                    "col1": 1,
                    "col2": [0,1,2,3,4,5]
                },
                "rptd": [
                    { "a": "foo"},
                    { "b": "boo"}
                ]
            },
            {
                "mapid": "m2",
                "mapvalue": {
                    "col1": 0,
                    "col2": []
                },
                "rptd": [
                    { "a": "bar"},
                    { "c": 1},
                    { "d": 4.5}
                ]
            }
        ]
    },
    "lst_lst" : [[1,2,3,4,5],[2,3,4,5,6]]
}

Query :

select flatten(rptd) from (select uid, d.map.rm[0].rptd rptd, flatten(d.lst_lst[1]) lst1 from `temp4.json` d) s1 order by s1.lst1;

When we remove the flatten from the top level query, things work fine

select s1.lst1 from (select uid, d.map.rm[0].rptd rptd, flatten(d.lst_lst[1]) lst1 from `temp4.json` d) s1 order by s1.lst1
+------------+
|    lst1    |
+------------+
| 2          |
| 3          |
| 4          |
| 5          |
| 6          |
+------------+

Log File contents for the error

java.lang.RuntimeException: java.lang.UnsupportedOperationException: Map, Array or repeated scalar type should not be used in group by, order by or in a comparison operator. Drill does not support compare between MAP:REQUIRED and MAP:REQUIRED.
        at org.apache.drill.exec.physical.impl.xsort.ExternalSortBatch.innerNext(ExternalSortBatch.java:408) ~[drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
        at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:142) ~[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.record.AbstractRecordBatch.next(AbstractRecordBatch.java:99) ~[drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
        at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:89) ~[drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
        at org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:51) ~[drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
        at org.apache.drill.exec.physical.impl.svremover.RemovingRecordBatch.innerNext(RemovingRecordBatch.java:96) ~[drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
        at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:142) ~[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.record.AbstractRecordBatch.next(AbstractRecordBatch.java:99) ~[drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
        at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:89) ~[drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
        at org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:51) ~[drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
        at org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:134) ~[drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
        at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:142) ~[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.ScreenCreator$ScreenRoot.innerNext(ScreenCreator.java:97) ~[drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
        at org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:57) ~[drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
        at org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:110) ~[drill-java-exec-0.8.0-SNAPSHOT-rebuffed.jar:0.8.0-SNAPSHOT]
        at org.apache.drill.exec.work.WorkManager$RunnableWrapper.run(WorkManager.java:254) [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_71]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_71]
        at java.lang.Thread.run(Thread.java:745) [na:1.7.0_71]

I am not very sure if this is related to DRILL-2096