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flow-php/dremel
===============

PHP ETL - Dremel algorithm implementation

0.34.3(1mo ago)248.0k↓30.7%MITPHPPHP ~8.3.0 || ~8.4.0 || ~8.5.0

Since Oct 13Pushed 1mo ago1 watchersCompare

[ Source](https://github.com/flow-php/dremel)[ Packagist](https://packagist.org/packages/flow-php/dremel)[ Fund](https://flow-php.com/sponsor)[ GitHub Sponsors](https://github.com/norberttech)[ RSS](/packages/flow-php-dremel/feed)WikiDiscussions 1.x Synced 1mo ago

READMEChangelogDependenciesVersions (50)Used By (0)

Dremel
======

[](#dremel)

Warning

This library is not ready yet. Currently, the implementation of the algorithms described in [this document](http://www-cs-students.stanford.edu/~adityagp/courses/cs598/papers/dremel.pdf) is located directly in the flow-php/parquet repository. To be able to extract the algorithms that allow flattening and rebuilding nested data structures, we will need to move several elements from the parquet library to the dremel library. Here are some of them:

- Schema
- Repetitions
- DremelShredder
- DremelAssembler

Important

This repository is a subtree split from our monorepo. If you'd like to contribute, please visit our main monorepo [flow-php/flow](https://github.com/flow-php/flow).

- 📜 [Documentation](https://flow-php.com/documentation/components/libs/dremel/)
- ➡️ [Installation](https://flow-php.com/documentation/installation/packages/dremel/)
- 🛠️ [Contributing](https://flow-php.com/documentation/contributing/)
- 🚧 [Upgrading](https://flow-php.com/documentation/upgrading/)

###  Health Score

52

—

FairBetter than 96% of packages

Maintenance90

Actively maintained with recent releases

Popularity32

Limited adoption so far

Community7

Small or concentrated contributor base

Maturity63

Established project with proven stability

 Bus Factor1

Top contributor holds 100% of commits — single point of failure

How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window.

**Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores.

**Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement.

**Maturity (30%)** — Project age, version count, PHP version support, and release stability.

###  Release Activity

Cadence

Every ~18 days

Recently: every ~26 days

Total

50

Last Release

52d ago

Major Versions

0.32.0 → 1.x-dev2026-03-27

PHP version history (5 changes)0.4.0PHP ~8.1 || ~8.2

0.5.0PHP ~8.1 || ~8.2 || ~8.3

0.6.0PHP ~8.1.0 || ~8.2.0 || ~8.3.0

0.22.0PHP ~8.2.0 || ~8.3.0 || ~8.4.0

0.31.0PHP ~8.3.0 || ~8.4.0 || ~8.5.0

### Community

Maintainers

![](https://avatars.githubusercontent.com/u/52325810?v=4)[norbert-tech](/maintainers/norbert-tech)[@norbert-tech](https://github.com/norbert-tech)

---

Top Contributors

[![norberttech](https://avatars.githubusercontent.com/u/1921950?v=4)](https://github.com/norberttech "norberttech (30 commits)")

---

Tags

filterextracttransformAlgorithmetlloaddremel

### Embed Badge

![Health badge](/badges/flow-php-dremel/health.svg)

```
[![Health](https://phpackages.com/badges/flow-php-dremel/health.svg)](https://phpackages.com/packages/flow-php-dremel)
```

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