sqlite-utils/sqlite_utils
Simon Willison 07b603e562
Preserve duplicate column names in query results
Queries returning duplicate column names - e.g. joins between tables
sharing column names - silently lost values because rows were built
with dict(zip(keys, row)), where the last duplicate wins.

Later occurrences are now renamed with a numeric suffix: id, id
becomes id, id_2 - skipping any suffix that would collide with a
real column in the same query.

The new utils.dedupe_keys() helper transforms the key list once per
query, so the per-row dict construction is unchanged and there is no
measurable performance impact.

Applied in Database.query() (including the PRAGMA and RETURNING
paths), Table.rows_where(), Table.search() and the CLI's JSON output.
CSV, TSV and table output keep the original duplicate headers.

Closes #624
2026-07-05 21:20:39 -07:00
..
__init__.py New migrations system, ported from sqlite-migrate (#754) 2026-06-21 09:40:21 -07:00
__main__.py Support 'python -m sqlite_utils', closes #368 2022-01-08 18:33:22 -08:00
cli.py Preserve duplicate column names in query results 2026-07-05 21:20:39 -07:00
db.py Preserve duplicate column names in query results 2026-07-05 21:20:39 -07:00
hookspecs.py More type annotations (#697) 2025-12-16 22:11:47 -08:00
migrations.py Polish: clearer errors, corrected docstrings, setuptools pin 2026-07-04 19:13:15 +00:00
plugins.py fix: Plugins are still loaded when running tests (#719) 2026-06-21 16:14:45 -07:00
py.typed py.typed file so mypy picks up the types, closes #331 2021-11-14 15:21:04 -08:00
recipes.py More type annotations (#697) 2025-12-16 22:11:47 -08:00
utils.py Preserve duplicate column names in query results 2026-07-05 21:20:39 -07:00