etlantic-polars 0.12.0

Polars dataframe execution plugin for ETLantic.

etlantic-polars

Polars dataframe plugin and Polars portable kernel transform compiler for ETLantic 0.12.

pip install 'etlantic==0.12.0' 'etlantic-polars==0.12.0'
# optional Arrow interchange
pip install 'etlantic-polars[arrow]'

Dataframe plugin

Supports eager DataFrame execution and LazyFrame preservation until an explicit collection boundary declared in the PipelinePlan.

Entry point: etlantic.dataframe_plugins → etlantic_polars:create_plugin.

Portable transform compiler (0.12)

Claims dtcs:profile/portable-relational-kernel/1 and executes kernel actions (filter, project, with_fields, drop_fields, rename_fields) plus the kernel function set without a native @implementation("polars").

from etlantic import Profile
from etlantic_polars import create_transform_compiler

Profile(
    name="polars-portable",
    dataframe_engine="polars",
    portable_transform_policy="require",  # or prefer / native
)
compiler = create_transform_compiler()
print(compiler.info.name, sorted(compiler.info.capabilities.actions)[:3])

Entry point: etlantic.transform_compilers → etlantic_polars:create_transform_compiler.

Runnable example: examples/portable_polars_kernel.py in the ETLantic repo.

Joins, windows, and conversion-profile functions remain unsupported until later releases (0.13+). See the compiler protocol and compatibility matrix.