[jira] [Created] (OPTIQ-340) Optiq IllegalArgumentException when push complex expressions into join conditions.

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

Jinfeng Ni created OPTIQ-340:
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             Summary: Optiq IllegalArgumentException when push complex expressions into join conditions.
                 Key: OPTIQ-340
                 URL: https://issues.apache.org/jira/browse/OPTIQ-340
             Project: Optiq
          Issue Type: Bug
            Reporter: Jinfeng Ni
            Assignee: Julian Hyde


Optiq SqlToRelConverter will throw IllegalArgumentException, when join conditions in the on clause contains a complex expression, in stead of a single column. For example ( the query itself is not a meaningful one). 

select e."deptno", d."deptno"
from "hr"."emps" as e
  join "hr"."depts" as d
  on ( e."deptno" + 1 - 1 = d."deptno" + 2 - 2  and
       e."deptno" + 10 - 10 = d."deptno" + 20 - 20 )

Optiq is trying to create projects for complex expression on both sides of join operator, and push project past the join operator. 
                                  
                                                            Join   (#1 = # 4 and #2 = #5) 
                                                   /                                   \
             Proj ( deptno, deptno+1-1, deptno +10-10)    Proj ( deptno, deptno+2-1, deptno +20-20)

However, in SqlRelConverter:pushDownJoinConditions(), the index for the new created expressions are not maintained properly, which lead to the IllegalArgumentException.
 



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