issues: 621989740
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| 621989740 | MDU6SXNzdWU2MjE5ODk3NDA= | 114 | table.transform() method for advanced alter table | 9599 | closed | 0 | 5897911 | 26 | 2020-05-20T18:20:46Z | 2020-09-22T07:51:37Z | 2020-09-22T04:20:02Z | OWNER | SQLite's `ALTER TABLE` can only do the following: * Rename a table * Rename a column * Add a column Notably, it cannot drop columns - so tricks like "add a float version of this text column, populate it, then drop the old one and rename" won't work. The docs here https://www.sqlite.org/lang_altertable.html#making_other_kinds_of_table_schema_changes describe a way of implementing full alters safely within a transaction, but it's fiddly. 1. Create new table 2. Copy data 3. Drop old table 4. Rename new into old It would be great if `sqlite-utils` provided an abstraction to help make these kinds of changes safely. | 140912432 | issue | {"url": "https://api.github.com/repos/simonw/sqlite-utils/issues/114/reactions", "total_count": 0, "+1": 0, "-1": 0, "laugh": 0, "hooray": 0, "confused": 0, "heart": 0, "rocket": 0, "eyes": 0} | completed |