Abhishek Girish created DRILL-2790:
--------------------------------------
Summary: 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
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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