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

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Fix Version/s: Future
• Component/s: Functions - Hive
• Assignee: Unassigned
• Reporter: Rahul Kumar Challapalli
• Created: 18/Jun/15 20:38
• Updated: 01/Oct/15 16:38

Description

git.commit.id.abbrev=4baf9e7

The below query works :

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       |
+---------+

However when I try to add a cast to the above query, it fails

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)

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