[DRILL-4963] Issues when overloading Drill native functions with dynamic UDFs

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.9.0
• Fix Version/s: 1.10.0
• Component/s: Functions - Drill
• Labels: ready-to-commit
• Assignee: Arina Ielchiieva
• Reporter: Roman Kulyk
• Reviewer: Paul Rogers
• Created: 25/Oct/16 17:36
• Updated: 07/Mar/17 19:13
• Resolved: 02/Mar/17 22:51

Description

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:

SELECT CURRENT_DATE('test') FROM (VALUES(1));

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

SELECT ABS('test','test') FROM (VALUES(1));

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

SELECT LOG('test') FROM (VALUES(1));

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.

Issue Links

• links to: GitHub Pull Request #701