how-query-engines-work
This is the companion repository for the book How Query Engines Work.
What to know before exploring
What it is
This is the companion repository for the book How Query Engines Work.
GitHub
Where it is used
No documented product use has been verified yet.
What people are saying
I highly recommend "How Query Engines Work" by Andy Grove (author of the Apache Datafusion Query Engine + Apache Ballista Distributed scheduler) It's written in Kotlin and is…
gavinray used a recommendation phrase. One indexed comment matches. This is a phrase match, not a verdict.
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Also in these discussions
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This week on Hacker News
Nov 8–Nov 15 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/15/2026, 9:28:18 AM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
Observed mentions: 2021-10-05 04:17:46 UTC to 2022-05-06 23:28:17 UTC. Weeks start Monday, UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| Oct 4 | 2021-10-04 00:00:00 UTC | 2021-10-11 00:00:00 UTC | 1 | 0 | 1 |
| Oct 11 | 2021-10-11 00:00:00 UTC | 2021-10-18 00:00:00 UTC | 0 | 0 | 0 |
| Oct 18 | 2021-10-18 00:00:00 UTC | 2021-10-25 00:00:00 UTC | 0 | 0 | 0 |
| Oct 25 | 2021-10-25 00:00:00 UTC | 2021-11-01 00:00:00 UTC | 0 | 0 | 0 |
| Nov 1 | 2021-11-01 00:00:00 UTC | 2021-11-08 00:00:00 UTC | 0 | 0 | 0 |
| Nov 8 | 2021-11-08 00:00:00 UTC | 2021-11-15 00:00:00 UTC | 0 | 0 | 0 |
| Nov 15 | 2021-11-15 00:00:00 UTC | 2021-11-22 00:00:00 UTC | 0 | 0 | 0 |
| Nov 22 | 2021-11-22 00:00:00 UTC | 2021-11-29 00:00:00 UTC | 0 | 0 | 0 |
| Nov 29 | 2021-11-29 00:00:00 UTC | 2021-12-06 00:00:00 UTC | 0 | 0 | 0 |
| Dec 6 | 2021-12-06 00:00:00 UTC | 2021-12-13 00:00:00 UTC | 0 | 0 | 0 |
| Dec 13 | 2021-12-13 00:00:00 UTC | 2021-12-20 00:00:00 UTC | 0 | 0 | 0 |
| Dec 20 | 2021-12-20 00:00:00 UTC | 2021-12-27 00:00:00 UTC | 0 | 0 | 0 |
| Dec 27 | 2021-12-27 00:00:00 UTC | 2022-01-03 00:00:00 UTC | 0 | 0 | 0 |
| Jan 3 | 2022-01-03 00:00:00 UTC | 2022-01-10 00:00:00 UTC | 0 | 0 | 0 |
| Jan 10 | 2022-01-10 00:00:00 UTC | 2022-01-17 00:00:00 UTC | 0 | 0 | 0 |
| Jan 17 | 2022-01-17 00:00:00 UTC | 2022-01-24 00:00:00 UTC | 0 | 0 | 0 |
| Jan 24 | 2022-01-24 00:00:00 UTC | 2022-01-31 00:00:00 UTC | 0 | 0 | 0 |
| Jan 31 | 2022-01-31 00:00:00 UTC | 2022-02-07 00:00:00 UTC | 0 | 0 | 0 |
| Feb 7 | 2022-02-07 00:00:00 UTC | 2022-02-14 00:00:00 UTC | 0 | 0 | 0 |
| Feb 14 | 2022-02-14 00:00:00 UTC | 2022-02-21 00:00:00 UTC | 0 | 0 | 0 |
| Feb 21 | 2022-02-21 00:00:00 UTC | 2022-02-28 00:00:00 UTC | 0 | 0 | 0 |
| Feb 28 | 2022-02-28 00:00:00 UTC | 2022-03-07 00:00:00 UTC | 0 | 0 | 0 |
| Mar 7 | 2022-03-07 00:00:00 UTC | 2022-03-14 00:00:00 UTC | 0 | 0 | 0 |
| Mar 14 | 2022-03-14 00:00:00 UTC | 2022-03-21 00:00:00 UTC | 0 | 0 | 0 |
| Mar 21 | 2022-03-21 00:00:00 UTC | 2022-03-28 00:00:00 UTC | 0 | 0 | 0 |
| Mar 28 | 2022-03-28 00:00:00 UTC | 2022-04-04 00:00:00 UTC | 0 | 0 | 0 |
| Apr 4 | 2022-04-04 00:00:00 UTC | 2022-04-11 00:00:00 UTC | 0 | 0 | 0 |
| Apr 11 | 2022-04-11 00:00:00 UTC | 2022-04-18 00:00:00 UTC | 0 | 0 | 0 |
| Apr 18 | 2022-04-18 00:00:00 UTC | 2022-04-25 00:00:00 UTC | 0 | 0 | 0 |
| Apr 25 | 2022-04-25 00:00:00 UTC | 2022-05-02 00:00:00 UTC | 0 | 0 | 0 |
| May 2 | 2022-05-02 00:00:00 UTC | 2022-05-09 00:00:00 UTC | 1 | 0 | 1 |
What Hacker News says
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