Changelog#

All notable changes to this project are documented on this page.

[v0.2.0] - 2026-03-17#

firstobs= and obs= source dataset options
Session.sql(query).
DatasetView.astype(mapping) for dataset-scoped type conversion in chained workflows.
Dataset labels in Arrow schema metadata under memlabel, and column labels in per-field Arrow metadata.
Session.include(path) for loading and executing external Data Step scripts from the current session.
DatasetView.select(columns, out=...) for explicit column selection.
Dictionary-based Session.set_option({...}) and Session.get_option(...) as reserved session options for future use.

Source-side dataset option processing order is now keep/drop → where → rename → obs/firstobs.
out= is now the primary user-facing output parameter for Session/DatasetView column-oriented helpers; DatasetView no longer exposes target= and Session keeps it only as a compatibility alias.
The Python backend implementation was split into executor_python.py, executor_py_stage.py, executor_py_stmt.py, and executor_py_data.py.

Initial release.