xiangfu0 opened a new pull request, #13340:
URL: https://github.com/apache/pinot/pull/13340
Fix the LEAD/LAG window function implementation to match the SQL syntax.
Syntax:
```sql
LEAD(column_name, offset, default_value) OVER (PARTITION BY partition_column
ORDER BY order_column)
LAG(column_name, offset, default_value) OVER (PARTITION BY partition_column
ORDER BY order_column)
```
- column_name: The column from which to retrieve the value.
- offset: The number of rows forward from the current row to access. Default
is 1 if not specified.
- default_value: The value to return if the offset goes beyond the number of
rows.
Example:
```
SELECT
employee_id,
salary,
LAG(salary, 1) OVER (ORDER BY employee_id) AS previous_salary
FROM employees;
```
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
