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From "Khurram Faraaz (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-3597) Disable RESPECT NULLS, IGNORE NULLS option for LEAD, LAG window functions
Date Mon, 03 Aug 2015 23:42:04 GMT
Khurram Faraaz created DRILL-3597:
-------------------------------------

             Summary: Disable RESPECT NULLS, IGNORE NULLS option for LEAD, LAG window functions
                 Key: DRILL-3597
                 URL: https://issues.apache.org/jira/browse/DRILL-3597
             Project: Apache Drill
          Issue Type: Bug
          Components: Execution - Relational Operators
    Affects Versions: 1.2.0
            Reporter: Khurram Faraaz
            Assignee: Chris Westin


The SQL standard defines a RESPECT NULLS or IGNORE NULLS option for lead, lag, first_value,
and last_value window functions. We need to (disable it) and report a meaningful message to
user if either of these two options is used in a query, with any of those functions.

Currently we throw parse errors when these options are used in query.

{code}
0: jdbc:drill:schema=dfs.tmp> select lead(c1,2) respect nulls over w from union_01 window
w as (partition by c3 order by c1);
Error: PARSE ERROR: Encountered "nulls" at line 1, column 27.
Was expecting one of:
    "FROM" ...
    "," ...
   

[Error Id: 73d09692-6374-41a2-bce0-db73d2828f1f on centos-04.qa.lab:31010] (state=,code=0)
{code}

{code}
0: jdbc:drill:schema=dfs.tmp> select lead(c1,2) ignore nulls over w from union_01 window
w as (partition by c3 order by c1);
Error: PARSE ERROR: Encountered "nulls" at line 1, column 26.
Was expecting one of:
    "FROM" ...
    "," ...
    


[Error Id: a7bd21b3-b46c-417d-a9d9-aa6d0378b0fc on centos-04.qa.lab:31010] (state=,code=0)
{code}




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