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Support query result post-aggregation / nested query

See original GitHub issue

Following Slack discussion : https://apache-pinot.slack.com/archives/C011C9JHN7R/p1623346401028100

Data date | 01 | 02 | 03 entity1 | 1 | 2 | 3 entity2 | 3 | 4 | 5

Goal Aggregate data in “2 dimensions”, first per entity (say, AVG), then per date (say, SUM)

This use case appears to be solvable using generic nested queries or an improvement to the existing post-aggregation feature.

Nested query example (not currently possible) SELECT SUM(agg_value) FROM (SELECT dateString, AVG(value) as agg_value FROM table GROUP BY dateString)

Workarounds

Perform post-aggregation client-side (provided that cardinality is lowish)
Use Presto

@Jackie-Jiang @mayankshriv: Feel free to edit the title & content

Issue Analytics

State:
Created 2 years ago
Reactions:1
Comments:7 (5 by maintainers)

Top GitHub Comments

1reaction

atriscommented, Jul 9, 2021

@Jackie-Jiang If it makes sense, I would like to start working on this.

0reactions

surajkmthcommented, Oct 28, 2021

Any updates on this thread ?

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