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# Description With summit coming up I thought we might update our README, since delta-rs has evolved quite a bit since the README was first written... Just opening the Draft to get feedback on the general "patterns" i.e. how the tables are formatted, how detailed we want to show the features and mostly the looks of the header. Also hoping our community experts may have some content they wat to add here 😆. cc @dennyglee @MrPowers @wjones127 @rtyler @houqp @fvaleye --------- Co-authored-by: Will Jones <willjones127@gmail.com> Co-authored-by: R. Tyler Croy <rtyler@brokenco.de>
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| <p align="center"> | ||
| <a href="https://delta.io/"> | ||
| <img src="https://github.com/delta-io/delta-rs/blob/main/logo.png?raw=true" alt="delta-rs logo" height="250"> | ||
| </a> | ||
| </p> | ||
| <p align="center"> | ||
| A native Rust library for Delta Lake, with bindings into Python | ||
| <br> | ||
| <a href="https://delta-io.github.io/delta-rs/python/">Python docs</a> | ||
| · | ||
| <a href="https://docs.rs/deltalake/latest/deltalake/">Rust docs</a> | ||
| · | ||
| <a href="https://github.com/delta-io/delta-rs/issues/new?template=bug_report.md">Report a bug</a> | ||
| · | ||
| <a href="https://github.com/delta-io/delta-rs/issues/new?template=feature_request.md">Request a feature</a> | ||
| · | ||
| <a href="https://github.com/delta-io/delta-rs/issues/1128">Roadmap</a> | ||
| <br> | ||
| <br> | ||
| <a href="https://pypi.python.org/pypi/deltalake"> | ||
| <img alt="Deltalake" src="https://img.shields.io/pypi/l/deltalake.svg?style=flat-square&color=00ADD4&logo=apache"> | ||
| </a> | ||
| <a target="_blank" href="https://github.com/delta-io/delta-rs" style="background:none"> | ||
| <img src="https://img.shields.io/github/stars/delta-io/delta-rs?logo=github&color=F75101"> | ||
| </a> | ||
| <a target="_blank" href="https://crates.io/crates/deltalake" style="background:none"> | ||
| <img alt="Crate" src="https://img.shields.io/crates/v/deltalake.svg?style=flat-square&color=00ADD4&logo=rust" > | ||
| </a> | ||
| <a href="https://pypi.python.org/pypi/deltalake"> | ||
| <img alt="Deltalake" src="https://img.shields.io/pypi/v/deltalake.svg?style=flat-square&color=F75101&logo=pypi" > | ||
| </a> | ||
| <a href="https://pypi.python.org/pypi/deltalake"> | ||
| <img alt="Deltalake" src="https://img.shields.io/pypi/pyversions/deltalake.svg?style=flat-square&color=00ADD4&logo=python"> | ||
| </a> | ||
| <a target="_blank" href="https://go.delta.io/slack"> | ||
| <img alt="#delta-rs in the Delta Lake Slack workspace" src="https://img.shields.io/badge/slack-delta-blue.svg?logo=slack&style=flat-square&color=F75101"> | ||
| </a> | ||
| </p> | ||
|
|
||
| The Delta Lake project aims to unlock the power of the Deltalake for as many users and projects as possible | ||
| by providing native low level APIs aimed at developers and integrators, as well as a high level operations | ||
| API that lets you query, inspect, and operate your Delta Lake with ease. | ||
|
|
||
| | Source | Downloads | Installation Command | Docs | | ||
| | --------------------- | --------------------------------- | ----------------------- | --------------- | | ||
| | **[PyPi][pypi]** | [![Downloads][pypi-dl]][pypi] | `pip install deltalake` | [Docs][py-docs] | | ||
| | **[Crates.io][pypi]** | [![Downloads][crates-dl]][crates] | `cargo add deltalake` | [Docs][rs-docs] | | ||
|
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| [pypi]: https://pypi.org/project/deltalake/ | ||
| [pypi-dl]: https://img.shields.io/pypi/dm/deltalake?style=flat-square&color=00ADD4 | ||
| [py-docs]: https://delta-io.github.io/delta-rs/python/ | ||
| [rs-docs]: https://docs.rs/deltalake/latest/deltalake/ | ||
| [crates]: https://crates.io/crates/deltalake | ||
| [crates-dl]: https://img.shields.io/crates/d/deltalake?color=F75101 | ||
|
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| ## Table of contents | ||
|
|
||
| - [Quick Start](#quick-start) | ||
| - [Get Involved](#get-involved) | ||
| - [Integartions](#integrations) | ||
| - [Features](#features) | ||
|
|
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| ## Quick Start | ||
|
|
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| The `deltalake` library aim to adopt familiar patterns from other libraries in data processing, | ||
| so getting started should look famililiar. | ||
|
|
||
| ```py3 | ||
| from deltalake import DeltaTable | ||
| from deltalake.write import write_deltalake | ||
| import pandas as pd | ||
|
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| # write some data into a delta table | ||
| df = pd.DataFrame({"id": [1, 2], "value": ["foo", "boo"]}) | ||
| write_deltalake("./data/delta", df) | ||
|
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| # load data from delta table | ||
| dt = DeltaTable("./data/delta") | ||
| df2 = dt.to_pandas() | ||
|
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| assert df == df2 | ||
| ``` | ||
|
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| The same table written can also be loaded using the core Rust crate: | ||
|
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| ```rs | ||
| use deltalake::{open_table, DeltaTableError}; | ||
|
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| #[tokio::main] | ||
| async fn main() -> Result<(), DeltaTableError> { | ||
| // open the table written in python | ||
| let table = open_table("./data/delta").await?; | ||
|
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| // show all active files in the table | ||
| let files = table.get_files(); | ||
| println!("{files}"); | ||
|
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| Ok(()) | ||
| } | ||
| ``` | ||
|
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| ## Get Involved | ||
|
|
||
| We encourage you to reach out, and are [commited](https://github.com/delta-io/delta-rs/blob/main/CODE_OF_CONDUCT.md) | ||
| to provide a welcoming community. | ||
|
|
||
| - [Join us in our Slack workspace](https://go.delta.io/slack) | ||
| - [Report an issue](https://github.com/delta-io/delta-rs/issues/new?template=bug_report.md) | ||
| - Looking to contribute? See our [good first issues](https://github.com/delta-io/delta-rs/contribute). | ||
|
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| ## Integrations | ||
|
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| Libraries and framewors that interoperate with delta-rs - in alphabetical order. | ||
|
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| - [AWS SDK for Pandas](https://github.com/aws/aws-sdk-pandas) | ||
| - [ballista][ballista] | ||
| - [datafusion][datafusion] | ||
| - [Dask](https://github.com/dask-contrib/dask-deltatable) | ||
| - [datahub](https://datahubproject.io/) | ||
| - [DuckDB](https://duckdb.org/) | ||
| - [polars](https://www.pola.rs/) | ||
| - [Ray](https://github.com/delta-incubator/deltaray) | ||
|
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| ## Features | ||
|
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| The following section outline some core features like supported [storage backends](#cloud-integrations) | ||
| and [operations](#supported-operations) that can be performed against tables. The state of implementation | ||
| of features outlined in the Delta [protocol][protocol] is also [tracked](#protocol-support-level). | ||
|
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| ### Cloud Integrations | ||
|
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||
| | Storage | Rust | Python | Comment | | ||
| | -------------------- | :-------------------: | :-------------------: | ----------------------------------- | | ||
| | Local | ![done] | ![done] | | | ||
| | S3 - AWS | ![done] | ![done] | requires lock for concurrent writes | | ||
| | S3 - MinIO | ![done] | ![done] | requires lock for concurrent writes | | ||
| | S3 - R2 | ![done] | ![done] | requires lock for concurrent writes | | ||
| | Azure Blob | ![done] | ![done] | | | ||
| | Azure ADLS Gen2 | ![done] | ![done] | | | ||
| | Micorosft OneLake | [![open]][onelake-rs] | [![open]][onelake-rs] | | | ||
| | Google Cloud Storage | ![done] | ![done] | | | ||
|
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| ### Supported Operations | ||
|
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| | Operation | Rust | Python | Description | | ||
| | --------------------- | :-----------------: | :-----------------: | ------------------------------------- | | ||
| | Create | ![done] | ![done] | Create a new table | | ||
| | Read | ![done] | ![done] | Read data from a table | | ||
| | Vacuum | ![done] | ![done] | Remove unused files and log entries | | ||
| | Delete - partitions | | ![done] | Delete a table partition | | ||
| | Delete - predicates | ![done] | | Delete data based on a predicate | | ||
| | Optimize - compaction | ![done] | ![done] | Harmonize the size of data file | | ||
| | Optimize - Z-order | ![done] | ![done] | Place similar data into the same file | | ||
| | Merge | [![open]][merge-rs] | [![open]][merge-py] | | | ||
| | FS check | ![done] | | Remove corrupted files from table | | ||
|
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| ### Protocol Support Level | ||
|
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| | Writer Version | Requirement | Status | | ||
| | -------------- | --------------------------------------------- | :------------------: | | ||
| | Version 2 | Append Only Tables | [![open]][roadmap] | | ||
| | Version 2 | Column Invariants | ![done] | | ||
| | Version 3 | Enforce `delta.checkpoint.writeStatsAsJson` | [![open]][writer-rs] | | ||
| | Version 3 | Enforce `delta.checkpoint.writeStatsAsStruct` | [![open]][writer-rs] | | ||
| | Version 3 | CHECK constraints | [![open]][writer-rs] | | ||
| | Version 4 | Change Data Feed | | | ||
| | Version 4 | Generated Columns | | | ||
| | Version 5 | Column Mapping | | | ||
| | Version 6 | Identity Columns | | | ||
| | Version 7 | Table Features | | | ||
|
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| | Reader Version | Requirement | Status | | ||
| | -------------- | ----------------------------------- | ------ | | ||
| | Version 2 | Collumn Mapping | | | ||
| | Version 3 | Table Features (requires reader V7) | | | ||
|
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| [datafusion]: https://github.com/apache/arrow-datafusion | ||
| [ballista]: https://github.com/apache/arrow-ballista | ||
| [polars]: https://github.com/pola-rs/polars | ||
| [open]: https://cdn.jsdelivr.net/gh/Readme-Workflows/Readme-Icons@main/icons/octicons/IssueOpened.svg | ||
| [done]: https://cdn.jsdelivr.net/gh/Readme-Workflows/Readme-Icons@main/icons/octicons/IssueClosed.svg | ||
| [roadmap]: https://github.com/delta-io/delta-rs/issues/1128 | ||
| [merge-py]: https://github.com/delta-io/delta-rs/issues/1357 | ||
| [merge-rs]: https://github.com/delta-io/delta-rs/issues/850 | ||
| [writer-rs]: https://github.com/delta-io/delta-rs/issues/851 | ||
| [onelake-rs]: https://github.com/delta-io/delta-rs/issues/1418 | ||
| [protocol]: https://github.com/delta-io/delta/blob/master/PROTOCOL.md |
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