Seungun Choe created TAJO-1448:
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Summary: Implement nth_value window function.
Key: TAJO-1448
URL: https://issues.apache.org/jira/browse/TAJO-1448
Project: Tajo
Issue Type: New Feature
Reporter: Seungun Choe
Assignee: Seungun Choe
Priority: Minor
Function : nth_value(value any, nth integer)
Return Type : same type as value
Description : returns value evaluated at the row that is the nth row of the
window frame (counting from 1); null if no such ro
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