DRILL-3962: Add Support For ROLLUP, CUBE, GROUPING SETS, GROUPING, GROUPING_ID, GROUP_ID

[cgivre]

DRILL-3962: Add Support For ROLLUP, CUBE, GROUPING SETS, GROUPING, GROUPING_ID, GROUP_ID

Description

In recent versions of SQL, there are several aggregates which create different summaries of the aggregate data.

Specifically, this PR adds support for:

• GROUPING SETS
• ROLLUP
• CUBE
• GROUPING()
• GROUPING_ID()
• GROUP_ID()

Documentation

GROUPING SETS:

GROUPING SETS allows you to define multiple independent groupings within a single GROUP BY query. Instead of writing separate queries for each aggregation, you can specify different column combinations to produce multiple summary results at once. It gives you fine-grained control over which subtotals are calculated.

SELECT department_id, position_title, SUM(salary) AS total_salary
FROM cp.`employee.json`
GROUP BY GROUPING SETS ((department_id), (position_title), ())

ROLLUP

ROLLUP generates hierarchical aggregations that move from detailed data to higher-level summaries. For example, a ROLLUP on (year, month, day) produces totals by day, month, year, and an overall grand total. It’s ideal for creating reports with cumulative subtotals.

SELECT position_title, education_level, AVG(salary) AS avg_salary
FROM cp.`employee.json`
GROUP BY ROLLUP (position_title, education_level);

CUBE

CUBE creates aggregations for all possible combinations of the specified columns. It’s useful for multidimensional analysis, such as computing totals across every dimension and their intersections. This produces the most comprehensive summary of the data.

SELECT position_title, 
education_level, 
AVG(salary) AS avg_salary
FROM cp.`employee.json`
GROUP BY CUBE (position_title, education_level);

Testing

Created additional unit tests.

[rymarm]

Hi @cgivre, I think it would be a good idea to split code from a single method for hundreds of rows into separate helper methods to improve code readability and maintainability. Please check my comments.

The overall change looks good to me, thank you for this!

[cgivre]

@rymarm Thanks for the review. I addressed all your comments.

[rymarm]

@cgivre Thank you for all the changes! LGTM +1

[cgivre]

Thanks @rymarm for the review!