Khurram Faraaz created DRILL-3596:
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Summary: Allow only (<expression>,default offset) in 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: Chris Westin
We need to disable the third input parameter in LEAD and LAG window functions.
We should support this syntax.
LEAD(<expression>,1)
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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