polars-hist-db
A Python library for building bitemporal data pipelines with Polars and MariaDB.
It ingests data from DSV files or NATS JetStream subjects, tracks history using MariaDB's system-versioned tables, and exposes everything as strongly-typed Polars DataFrames.
Features
- Typed uploads — push Polars DataFrames into MariaDB with automatic type mapping between Polars, SQL, and SQLAlchemy.
- Typed queries — read tables back into DataFrames with column types inferred from the database schema. Temporal query hints (
asof,span,all) let you slice history without writing SQL. - YAML-driven pipelines — define scrape specifications that handle column typing, enrichment via custom transform functions, normalization across tables, and foreign-key deduction.
- Deduplication — an audit log tracks what has already been ingested so re-runs skip previously processed files or messages.
- Transactional ingestion — each file or message is processed in its own transaction; failures roll back cleanly without affecting other items.
- Dual input sources — crawl directories for DSV files, or consume messages from NATS JetStream with configurable fetch/subscription strategies.
- Delta upserts — staging tables detect changed rows, handle duplicates (
take_first,take_last,error), and optionally mark disappeared rows as dropped.
Full documentation: jr200.github.io/polars-hist-db
Quick Start
uv sync
make test
Development
make check # ruff + mypy
make docs # render and preview quarto docs
make bump PART=patch
make release
License
This project is licensed under the MIT license.
1 maintainer
Download files
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.
Source Distribution
Built Distribution
Filter files by name, interpreter, ABI, and platform.
If you're not sure about the file name format, learn more about wheel file names.
Copy a direct link to the current filters
File details
Details for the file polars_hist_db-0.12.73.tar.gz.
File metadata
- Download URL: polars_hist_db-0.12.73.tar.gz
- Upload date:
- Size: 948.7 kB
- Tags: Source
- Uploaded using Trusted Publishing? No
- Uploaded via:
uv/0.11.30 {"installer":{"name":"uv","version":"0.11.30","subcommand":["publish"]},"python":null,"implementation":{"name":null,"version":null},"distro":{"name":"Ubuntu","version":"24.04","id":"noble","libc":null},"system":{"name":null,"release":null},"cpu":null,"openssl_version":null,"setuptools_version":null,"rustc_version":null,"ci":true}
File hashes
| Algorithm | Hash digest | |
|---|---|---|
| SHA256 |
958cf431044c09da783f7a18c6b572c26930f38d66b7d86dcb8ed93c3db9ff90
|
|
| MD5 |
188782f6063f5d0eadfc3dadba9d7269
|
|
| BLAKE2b-256 |
1af6ba4f426c9bcd7f06a203af43900a34d7c717b9d5dc5a0040b7fde419cc25
|
File details
Details for the file polars_hist_db-0.12.73-py3-none-any.whl.
File metadata
- Download URL: polars_hist_db-0.12.73-py3-none-any.whl
- Upload date:
- Size: 171.9 kB
- Tags: Python 3
- Uploaded using Trusted Publishing? No
- Uploaded via:
uv/0.11.30 {"installer":{"name":"uv","version":"0.11.30","subcommand":["publish"]},"python":null,"implementation":{"name":null,"version":null},"distro":{"name":"Ubuntu","version":"24.04","id":"noble","libc":null},"system":{"name":null,"release":null},"cpu":null,"openssl_version":null,"setuptools_version":null,"rustc_version":null,"ci":true}
File hashes
| Algorithm | Hash digest | |
|---|---|---|
| SHA256 |
ccc6a85af7aff92e8a9bed67e2ba78e1d5a12e767d73d88d9d1327b8be462583
|
|
| MD5 |
6c56c721b2c41a13b060a982a289a46d
|
|
| BLAKE2b-256 |
330956a6d38a51a3313e64f5637da1f75ef29eeebf17ab8aa6ddf6c64019300f
|
