[jira] [Created] (DRILL-3314) Casting the output of xpath_string hive function results in a function not found error

["Rahul Challapalli (JIRA)" <ji...@apache.org>]

Rahul Challapalli created DRILL-3314:
----------------------------------------

             Summary: Casting the output of xpath_string hive function results in a function not found error
                 Key: DRILL-3314
                 URL: https://issues.apache.org/jira/browse/DRILL-3314
             Project: Apache Drill
          Issue Type: Bug
          Components: Functions - Hive
            Reporter: Rahul Challapalli
            Assignee: Mehant Baid
             Fix For: 1.1.0


git.commit.id.abbrev=4baf9e7

The below query works :
{code}
select xpath_string ('<a><b id="5"><c/></b><b id="2"><c/></b></a>','/descendant::c/ancestor::b/@id') from dfs.`cross-sources`.`fewtypes_null.parquet` limit 1;
+---------+
| EXPR$0  |
+---------+
| 5       |
+---------+
{code}

However when I try to add a cast to the above query, it fails
{code}
select cast(xpath_string ('<a><b id="5"><c/></b><b id="2"><c/></b></a>','/descendant::c/ancestor::b/@id') as int) from dfs.`cross-sources`.`fewtypes_null.parquet` limit 1;
Error: SYSTEM ERROR: org.apache.drill.exec.exception.SchemaChangeException: Failure while trying to materialize incoming schema.  Errors:
 
Error in expression at index -1.  Error: Missing function implementation: [castBIGINT(VAR16CHAR-OPTIONAL)].  Full expression: --UNKNOWN EXPRESSION--..

Fragment 0:0

[Error Id: 4037a41e-73c8-4a6b-a5d2-b5a949aba933 on qa-node190.qa.lab:31010] (state=,code=0)
{code}

I attached the log file. Let me know if you need anything more.



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