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From "Jacques Nadeau (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DRILL-2790) Implicit cast to numbers fails when Text data contains empty strings
Date Tue, 05 May 2015 13:36:43 GMT

     [ https://issues.apache.org/jira/browse/DRILL-2790?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jacques Nadeau updated DRILL-2790:
----------------------------------
    Fix Version/s: 1.2.0

> Implicit cast to numbers fails when Text data contains empty strings 
> ---------------------------------------------------------------------
>
>                 Key: DRILL-2790
>                 URL: https://issues.apache.org/jira/browse/DRILL-2790
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Query Planning & Optimization
>    Affects Versions: 0.9.0
>            Reporter: Abhishek Girish
>            Assignee: Jinfeng Ni
>             Fix For: 1.2.0
>
>
> When a column in a Text file (CSV) contains empty strings, any query which uses valid
implicit casts fail to execute with NumberFormatException. Drill should ignore empty strings
in such scenarios. If not, the error message must be improved to clearly indicate the same.

> *Text:*
> {code:sql}
> > select columns[4] from `store.dat` limit 10;
> +------------+
> |   EXPR$0   |
> +------------+
> | 2451189    |
> |            |
> |            |
> | 2451044    |
> | 2450910    |
> |            |
> |            |
> |            |
> |            |
> |            |
> +------------+
> 10 rows selected (0.154 seconds)
> > select * from `store.dat` where columns[4] = 2451189 limit 1;
> Query failed: RemoteRpcException: Failure while running fragment.,  [ e5348e11-ec53-4332-981a-ff070253c19a
on abhi6.qa.lab:31010 ]
> [ e5348e11-ec53-4332-981a-ff070253c19a on abhi6.qa.lab:31010 ]
> Error: exception while executing query: Failure while executing query. (state=,code=0)
> {code}
> Log snippet:
> {code}
> 2015-04-14 14:16:50,642 [2ad27c3c-8b36-a116-4d38-18410eff96d2:frag:0:0] ERROR o.a.drill.exec.ops.FragmentContext
- Fragment Context received failure -- Fragment: 0:0
> java.lang.NumberFormatException:
>         at org.apache.drill.exec.expr.fn.impl.StringFunctionHelpers.nfeI(StringFunctionHelpers.java:97)
~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
>         at org.apache.drill.exec.expr.fn.impl.StringFunctionHelpers.varCharToInt(StringFunctionHelpers.java:103)
~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
>         at org.apache.drill.exec.test.generated.FiltererGen97.doEval(FilterTemplate2.java:37)
~[na:na]
>         at org.apache.drill.exec.test.generated.FiltererGen97.filterBatchNoSV(FilterTemplate2.java:98)
~[na:na]
>         at org.apache.drill.exec.test.generated.FiltererGen97.filterBatch(FilterTemplate2.java:71)
~[na:na]
>         at org.apache.drill.exec.physical.impl.filter.FilterRecordBatch.doWork(FilterRecordBatch.java:82)
~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
>         at org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:93)
~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
>         at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:142)
~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
>         at org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:118)
~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
> {code}
> The following query works:
> {code:sql}
> > select columns[4] from `store.dat` where columns[4] <>'' AND columns[4]= 2451189
limit 1;
> +------------+
> |   EXPR$0   |
> +------------+
> | 2451189    |
> +------------+
> 1 row selected (0.174 seconds)
> {code}
> *Parquet:*
> {code:sql}
> > select s_closed_date_sk from store where s_closed_date_sk = 2451189 limit 1;
> +------------------+
> | s_closed_date_sk |
> +------------------+
> | 2451189          |
> +------------------+
> 1 row selected (0.122 seconds)
> {code}



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