Custom aggregation with doric syntax

[alfonsorr]

Description

This pull request allows the creation of aggregation functions with the syntax of doric.

Example of mean implemented with customAgg in doric

val complexAggWithoutNames = customAgg[Long, Row, Double](
       col[Long]("id"),
       struct(lit(0L), lit(0L)),
       (x, y) =>
         struct(
           x.getChild[Long]("col1") + y,
           x.getChild[Long]("col2") + 1L.lit
         ),
       (x, y) =>
         struct(
           x.getChild[Long]("col1") + y.getChild[Long]("col1"),
           x.getChild[Long]("col2") + y.getChild[Long]("col2")
         ),
       x => x.getChild[Long]("col1") / x.getChild[Long]("col2")
     )

Related Issues and dependencies

• Resolves [Feature request]: User defined aggregations using doric syntax #311
• Depends on XXX

How Has This Been Tested?

The test is developed with simple and complex zero values.

• This pull request contains the appropriate tests?:
  • YES

[github-actions]

This is an auto-generated comment created by:

• Date : 2023-01-24 09:39:49 +0000 (UTC)
• Workflow : PR comment
• Job name : create_test_summary_report
• Run : 3994850431
• Commit : a9308e7 Added documentation to new functionality

Actor	Triggering actor	Sender
eruizalo	eruizalo	eruizalo
Triggered by: Workflow name: "CI" at .github/workflows/ci.yml URL: https://github.com/hablapps/doric/actions/runs/3994766992 on workflow_run:completed

Test summary report 📊

Spark version	testing
2.4.1
2.4.2
2.4.3
2.4.4
2.4.5
2.4.6
2.4.7
2.4
3.0.0
3.0.1
3.0.2
3.0
3.1.0
3.1.1
3.1.2
3.1
3.2.0
3.2.1
3.2
3.3.0
3.3

[eruizalo]

This is so powerful, I think we should advertise it as it deserves with some documentation.
Otherwise it could sank into oblivion.

[codecov]

Codecov Report

Merging #312 (a9308e7) into main (c78276a) will increase coverage by 0.07%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #312      +/-   ##
==========================================
+ Coverage   97.35%   97.42%   +0.07%     
==========================================
  Files          58       60       +2     
  Lines        1134     1163      +29     
  Branches       22       14       -8     
==========================================
+ Hits         1104     1133      +29     
  Misses         30       30              

Flag	Coverage Δ
spark-2.4.x	94.69% <0.00%> (-0.19%)	⬇️
spark-3.0.x	96.48% <0.00%> (-0.18%)	⬇️
spark-3.1.x	97.29% <0.00%> (-0.18%)	⬇️
spark-3.2.x	97.53% <100.00%> (+0.06%)	⬆️
spark-3.3.x	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...c/main/scala/doric/syntax/AggregationColumns.scala	100.00% <ø> (ø)
core/src/main/scala/doric/doric.scala	94.74% <100.00%> (+0.62%)	⬆️
...3.2_3.3/scala/doric/sqlExpressions/CustomAgg.scala	100.00% <100.00%> (ø)
..._3.3/scala/doric/syntax/AggregationColumns32.scala	100.00% <100.00%> (ø)

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