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From "Khurram Faraaz (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (DRILL-2694) Correlated subquery can not be planned
Date Thu, 02 Jul 2015 18:51:05 GMT

     [ https://issues.apache.org/jira/browse/DRILL-2694?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Khurram Faraaz resolved DRILL-2694.
-----------------------------------
       Resolution: Fixed
    Fix Version/s:     (was: 1.2.0)
                   1.1.0

Verified the fix.

> 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: Khurram Faraaz
>             Fix For: 1.1.0
>
>
> 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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