[jira] [Created] (DRILL-4963) Issues when overloading Drill native functions with dynamic UDFs

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

Roman created DRILL-4963:
----------------------------

             Summary: Issues when overloading Drill native functions with dynamic UDFs
                 Key: DRILL-4963
                 URL: https://issues.apache.org/jira/browse/DRILL-4963
             Project: Apache Drill
          Issue Type: Bug
          Components: Functions - Drill
    Affects Versions: 1.9.0
            Reporter: Roman


I created jar file which overloads 3 DRILL native functions (LOG(VARCHAR-REQUIRED), CURRENT_DATE(VARCHAR-REQUIRED) and ABS(VARCHAR-REQUIRED,VARCHAR-REQUIRED)) and registered it as dynamic UDF.

If I try to use my functions I will get errors:

{code:xml}
SELECT CURRENT_DATE('test') FROM (VALUES(1));
{code}
Error: FUNCTION ERROR: CURRENT_DATE does not support operand types (CHAR)
SQL Query null

{code:xml}
SELECT ABS('test','test') FROM (VALUES(1));
{code}

Error: FUNCTION ERROR: ABS does not support operand types (CHAR,CHAR)
SQL Query null

{code:xml}
SELECT LOG('test') FROM (VALUES(1));
{code}
Error: SYSTEM ERROR: DrillRuntimeException: Failure while materializing expression in constant expression evaluator LOG('test').  Errors: 
Error in expression at index -1.  Error: Missing function implementation: castTINYINT(VARCHAR-REQUIRED).  Full expression: UNKNOWN EXPRESSION.

But if I rerun all this queries after "DrillRuntimeException", they will run correctly. It seems that Drill have not updated the function signature before that error. Also if I add jar as usual UDF (copy jar to /drill_home/jars/3rdparty and restart drillbits), all queries will run correctly without errors.



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