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transform() now works for tables referenced by views

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Bracket the ALTER TABLE ... RENAME TO statements emitted by
transform_sql() with PRAGMA legacy_alter_table=ON/OFF. Since SQLite
3.25 the rename would otherwise rewrite references in every view
definition, which failed with "no such table" when a view referenced
the just-dropped table, and with keep_table= silently repointed
dependent views at the frozen backup table.

View definitions are now left byte-for-byte unchanged by a transform.

Closes #831

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Simon Willison 2026-08-06 22:08:37 -07:00
commit 8f264e8d2a
5 changed files with 179 additions and 2 deletions
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@ -2288,7 +2288,11 @@ If you want to see the SQL that will be executed to make the change without actu
INSERT INTO "roadside_attractions_new_4033a60276b9" ("longitude", "latitude", "id", "name")
SELECT "longitude", "latitude", "pk", "name" FROM "roadside_attractions";
DROP TABLE "roadside_attractions";
PRAGMA legacy_alter_table=ON;
ALTER TABLE "roadside_attractions_new_4033a60276b9" RENAME TO "roadside_attractions";
PRAGMA legacy_alter_table=OFF;
Tables that are referenced by views can be transformed - the view definitions are left unchanged, see :ref:`python_api_transform_views` for details.
.. note::
In Python: :ref:`table.transform() <python_api_transform>` CLI reference: :ref:`sqlite-utils transform <cli_ref_transform>`