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https://issues.apache.org/jira/browse/DRILL-3596?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14710125#comment-14710125
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ASF GitHub Bot commented on DRILL-3596:
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GitHub user adeneche opened a pull request:
https://github.com/apache/drill/pull/128
DRILL-3596: Allow only (expression) or (expression, 1) for LEAD a…
…nd LAG window functions as input parameters
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/adeneche/incubator-drill DRILL-3596
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/drill/pull/128.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #128
commit 87e411f38665c3c4cdf4313516862505a4cfdf0c
Author: adeneche adene...@gmail.com
Date: 2015-08-24T20:37:25Z
DRILL-3596: Allow only (expression) or (expression, 1) for LEAD and LAG
window functions as input parameters
Allow only (expression) or (expression, 1) for LEAD and LAG window
functions as input parameters
Key: DRILL-3596
URL: https://issues.apache.org/jira/browse/DRILL-3596
Project: Apache Drill
Issue Type: Bug
Components: Execution - Relational Operators
Affects Versions: 1.2.0
Reporter: Khurram Faraaz
Assignee: Deneche A. Hakim
Labels: window_function
Fix For: 1.2.0
We need to disable the third input parameter in LEAD and LAG window
functions. We should support this syntax.
LEAD(expression) ,or LEAD(expression,1)
LAG(expression), or LAG(expression,1)
In both the functions above, the second parameter is the default offset
value, use of any other value must he handled and reported to user as error.
Use of a third input parameter to both the functions must be disallowed.
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