[jira] [Created] (DRILL-4429) Need a better error message when window frame exclusion is used in frame-clause

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

Khurram Faraaz created DRILL-4429:
-------------------------------------

             Summary: Need a better error message when window frame exclusion is used in frame-clause
                 Key: DRILL-4429
                 URL: https://issues.apache.org/jira/browse/DRILL-4429
             Project: Apache Drill
          Issue Type: Bug
          Components: SQL Parser
    Affects Versions: 1.6.0
            Reporter: Khurram Faraaz
            Priority: Minor


We need to report a proper error message to user when window frame exclusion is used in the window frame-clause. Currently we do not support it and the current error message is not helpful.

Drill 1.6.0
commit ID: 6d5f4983

{noformat}
0: jdbc:drill:schema=dfs.tmp> select count(*) OVER(PARTITION BY CAST(columns[0] as integer) ORDER BY cast(columns[0] as integer) RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED following EXCLUDE CURRENT ROW) from dfs.tmp.`t_alltype.csv`;
Error: PARSE ERROR: Encountered "EXCLUDE" at line 1, column 158.
Was expecting one of:
    ")" ...
    "ALLOW" ...
    "DISALLOW" ...


while parsing SQL query:
select count(*) OVER(PARTITION BY CAST(columns[0] as integer) ORDER BY cast(columns[0] as integer) RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED following EXCLUDE CURRENT ROW) from dfs.tmp.`t_alltype.csv`
                                                                                                                                                             ^

[Error Id: ddfcd7fc-1a84-4e1f-8e51-34601e9155a6 on centos-04.qa.lab:31010] (state=,code=0)
{noformat}

>From the SQL specification, we need to add these.

{noformat}
<window frame exclusion> ::=
    EXCLUDE CURRENT ROW
  | EXCLUDE GROUP
  | EXCLUDE TIES
  | EXCLUDE NO OTHERS
{noformat}



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