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From "Khurram Faraaz (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-2694) Correlated subquery can not be planned
Date Sat, 04 Apr 2015 21:24:33 GMT
Khurram Faraaz created DRILL-2694:
-------------------------------------

             Summary: Correlated subquery can not be planned
                 Key: DRILL-2694
                 URL: https://issues.apache.org/jira/browse/DRILL-2694
             Project: Apache Drill
          Issue Type: Bug
          Components: Query Planning & Optimization
    Affects Versions: 0.9.0
         Environment: 9d92b8e319f2d46e8659d903d355450e15946533 | DRILL-2580: Exit early from
HashJoinBatch if build side is empty | 26.03.2015 @ 16:13:53 EDT 
            Reporter: Khurram Faraaz
            Assignee: Jinfeng Ni


Correlated subquery can not be planned. Test was run on 4 node cluster on CentOS. Please note
that Physical plan tab and Visualized plan tabs were empty for the below query.

{code}
0: jdbc:drill:> select * from `allTypData.csv` t1 where t1.columns[0] > (select min(columns[0])
from `allTypData2.csv` t2);
Query failed: UnsupportedRelOperatorException: This query cannot be planned possibly due to
either a cartesian join or an inequality join

Error: exception while executing query: Failure while executing query. (state=,code=0)

Table in outer query has 295 rows.

0: jdbc:drill:> select count(*) from `allTypData.csv`;
+------------+
|   EXPR$0   |
+------------+
| 295        |
+------------+
1 row selected (0.082 seconds)

Table in inner query has 999 rows.

0: jdbc:drill:> select count(*) from `allTypData2.csv`;
+------------+
|   EXPR$0   |
+------------+
| 999        |
+------------+
1 row selected (0.083 seconds)

sub query is,

0: jdbc:drill:> select min(columns[0]) from `allTypData2.csv`;
+------------+
|   EXPR$0   |
+------------+
| -1000041497 |
+------------+
1 row selected (0.097 seconds)

Note that when we replace the sub-query with the value that the sub-query returns, the original
query returns results. It fails only when there is correlated subquery.

select * from `allTypData.csv` t1 where t1.columns[0] > -1000041497;
+------------+
|  columns   |
+------------+
...
+------------+
214 rows selected (0.162 seconds)

0: jdbc:drill:> explain plan for select * from `allTypData.csv` t1 where t1.columns[0]
> (select min(columns[0]) from `allTypData2.csv` t2);
Query failed: UnsupportedRelOperatorException: This query cannot be planned possibly due to
either a cartesian join or an inequality join

Error: exception while executing query: Failure while executing query. (state=,code=0)
{code}

Stack trace from drillbit.log 

{code}
2015-04-04 21:12:40,687 [2adfac37-037b-c692-31b1-41d8004d9b13:foreman] INFO  o.a.drill.exec.work.foreman.Foreman
- State change requested.  PENDING --> FAILED
org.apache.drill.exec.work.foreman.UnsupportedRelOperatorException: This query cannot be planned
possibly due to either a cartesian join or an inequality join
        at org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler.convertToDrel(DefaultSqlHandler.java:217)
~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler.getPlan(DefaultSqlHandler.java:138)
~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.planner.sql.DrillSqlWorker.getPlan(DrillSqlWorker.java:145)
~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.work.foreman.Foreman.runSQL(Foreman.java:773) ~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.work.foreman.Foreman.run(Foreman.java:204) ~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
[na:1.7.0_75]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
[na:1.7.0_75]
        at java.lang.Thread.run(Thread.java:745) [na:1.7.0_75]
2015-04-04 21:12:40,695 [2adfac37-037b-c692-31b1-41d8004d9b13:foreman] INFO  o.a.drill.exec.work.foreman.Foreman
- foreman cleaning up - status: []
2015-04-04 21:12:40,696 [2adfac37-037b-c692-31b1-41d8004d9b13:foreman] ERROR o.a.drill.exec.work.foreman.Foreman
- Error 59dcbb50-d418-400a-9c0c-7331fcb6b344: UnsupportedRelOperatorException: This query
cannot be planned possibly due to either a cartesian join or an inequality join
org.apache.drill.exec.work.foreman.UnsupportedRelOperatorException: This query cannot be planned
possibly due to either a cartesian join or an inequality join
        at org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler.convertToDrel(DefaultSqlHandler.java:217)
~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler.getPlan(DefaultSqlHandler.java:138)
~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.planner.sql.DrillSqlWorker.getPlan(DrillSqlWorker.java:145)
~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.work.foreman.Foreman.runSQL(Foreman.java:773) ~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.work.foreman.Foreman.run(Foreman.java:204) ~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
[na:1.7.0_75]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
[na:1.7.0_75]
        at java.lang.Thread.run(Thread.java:745) [na:1.7.0_75]
{code}



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