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kumo_relational_engine

The Kumo Relational driver for the kumo-relational-client client.

This distribution provides the heavy, client-side machinery a Kumo Relational prediction needs before a request reaches a NIM: the relational Graph/Table abstractions, the neighbor samplers (local native relationallib, plus DuckDB / SQLite / Snowflake / Databricks / PostgreSQL backends), the PQL parser, and the HTTP client that talks to a Universal TFM NIM.

It is imported as kumo_relational_engine and is normally installed transitively via the client's relational extra rather than on its own:

pip install kumo-relational-client[relational]      # pulls the kumo_relational_engine driver

It can also be installed on its own, for the graph, sampler and PQL machinery. Predicting is not available that way: the engine's entry points refuse a direct call, so a prediction has to go through kumo-relational-client.

pip install kumo-relational-engine
# optional data backends:
pip install "kumo-relational-engine[duckdb]"      # or [sqlite] / [snowflake] / [databricks] / [postgres]
# optional features:
pip install "kumo-relational-engine[explain]"     # natural-language explanation summaries
pip install "kumo-relational-engine[relbench]"    # Graph.from_relbench() dataset loading
pip install "kumo-relational-engine[codegen]"     # regenerate the TFM API client (see scripts/)

Graph.from_postgres() reads existing PostgreSQL tables:

import psycopg
from kumo_relational_client import relational

connection = psycopg.connect(
    host=host,
    dbname=database,
    user=user,
    password=credential,
    sslmode='require',
)
graph = relational.Graph.from_postgres(connection, schema='public')

schema is the table namespace; omit it to use current_schema() (public is the usual default). connection may instead be a PostgreSQL URI/libpq string or a dictionary of psycopg arguments; if omitted, psycopg uses PG* environment variables. See postgres.py. Lakebase uses this same API through its PostgreSQL endpoint with TLS and either an OAuth token or an enabled native Postgres password. It reads existing tables directly—without Unity Catalog registration, copying data, or DDL.

Temporal sampling returns at most the requested latest N rows at or before each anchor, ordered by time descending then primary key ascending. For large fact tables, an index on (foreign_key, time_column DESC, primary_key) improves this pushed-down query; the SDK never creates indexes or modifies source tables.

Release wheels are built for CPython 3.10, 3.11, 3.12 and 3.13 on Linux x86-64 and ARM64 (manylinux_2_28), macOS 11 and later on Intel and Apple silicon, and Windows x64. Windows on ARM64 has no wheel, and no source distribution is published.

Application code should import the client's neutral surface, not this package directly:

from kumo_relational_client import RelationalClient, relational

graph = relational.Graph.from_data({'users': df1, 'items': df2, 'orders': df3})
with RelationalClient(url='http://localhost:8000') as client:
    result = client.relational(graph).predict(
        'PREDICT SUM(orders.price, 0, 30, days) FOR items.item_id=1'
    )

Local development

pip install -e ".[test,databricks]"
pytest tests -m "not live_nim"

The live-NIM suite (scripts/run_rfm_nim_live_tests.sh --full) includes durable, ticket-free rejection regressions for fixed NIM defects; every rejection probe is followed by a known-good prediction to detect service degradation.

The native neighbor sampler (kumo_relational_engine.relationallib) is built from src/kumo_relational_engine/csrc/neighbor_sampler.cpp via CMake/scikit-build-core. Set WITH_RELATIONALLIB=0 to skip the native build for a pure-Python editable install.

Metadata

Release files for kumo-relational-engine 1.0.2

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kumo_relational_engine-1.0.2-cp313-cp313-win_amd64.whl CPython 3.13 CPython 3.13 Windows x86-64 Details
kumo_relational_engine-1.0.2-cp313-cp313-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl CPython 3.13 CPython 3.13 Linux glibc 2.27+ x86-64, Linux glibc 2.28+ x86-64 Details
kumo_relational_engine-1.0.2-cp313-cp313-manylinux_2_26_aarch64.manylinux_2_28_aarch64.whl CPython 3.13 CPython 3.13 Linux glibc 2.26+ ARM64, Linux glibc 2.28+ ARM64 Details
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kumo_relational_engine-1.0.2-cp312-cp312-win_amd64.whl CPython 3.12 CPython 3.12 Windows x86-64 Details
kumo_relational_engine-1.0.2-cp312-cp312-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl CPython 3.12 CPython 3.12 Linux glibc 2.27+ x86-64, Linux glibc 2.28+ x86-64 Details
kumo_relational_engine-1.0.2-cp312-cp312-manylinux_2_26_aarch64.manylinux_2_28_aarch64.whl CPython 3.12 CPython 3.12 Linux glibc 2.26+ ARM64, Linux glibc 2.28+ ARM64 Details
kumo_relational_engine-1.0.2-cp312-cp312-macosx_11_0_x86_64.whl CPython 3.12 CPython 3.12 macOS 11.0+ x86-64 Details
kumo_relational_engine-1.0.2-cp312-cp312-macosx_11_0_arm64.whl CPython 3.12 CPython 3.12 macOS 11.0+ ARM64 Details
kumo_relational_engine-1.0.2-cp311-cp311-win_amd64.whl CPython 3.11 CPython 3.11 Windows x86-64 Details
kumo_relational_engine-1.0.2-cp311-cp311-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl CPython 3.11 CPython 3.11 Linux glibc 2.27+ x86-64, Linux glibc 2.28+ x86-64 Details
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kumo_relational_engine-1.0.2-cp311-cp311-macosx_11_0_x86_64.whl CPython 3.11 CPython 3.11 macOS 11.0+ x86-64 Details
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kumo_relational_engine-1.0.2-cp310-cp310-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl CPython 3.10 CPython 3.10 Linux glibc 2.27+ x86-64, Linux glibc 2.28+ x86-64 Details
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kumo_relational_engine-1.0.2-cp310-cp310-macosx_11_0_arm64.whl CPython 3.10 CPython 3.10 macOS 11.0+ ARM64 Details

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