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Preserve composite UNIQUE constraints in transforms

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Simon Willison 2026-08-12 18:46:18 -07:00
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- ``table.transform()`` now preserves column-level and composite ``UNIQUE`` constraints, including constraint names, collations, sort order and ``ON CONFLICT`` behavior. Renaming columns updates those constraints, while dropping any constituent column removes the entire constraint. (:issue:`762`)
- ``table.transform()`` now preserves ``AUTOINCREMENT`` primary keys and their sequence high-water marks. Previously a transform removed ``AUTOINCREMENT`` and could reuse deleted row IDs. (:issue:`602`)
- New ``table.checks``, ``table.column_checks`` and ``table.table_checks`` introspection properties expose column-level and table-level ``CHECK`` constraints. (:issue:`834`)
- New ``sqlite_utils.ANY`` marker type for creating and introspecting SQLite ``ANY`` columns. The Python API and CLI can create, add and transform these columns, and ``table.transform()`` and ``table.extract()`` now preserve ``ANY`` columns and their values in ``STRICT`` tables. (:issue:`790`)