issues: 686978131
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| id | node_id | number | title | user | state | locked | assignee | milestone | comments | created_at | updated_at | closed_at | author_association | pull_request | body | repo | type | active_lock_reason | performed_via_github_app | reactions | draft | state_reason |
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| 686978131 | MDU6SXNzdWU2ODY5NzgxMzE= | 139 | insert_all(..., alter=True) should work for new columns introduced after the first 100 records | 96218 | closed | 0 | 7 | 2020-08-27T06:25:25Z | 2020-08-28T22:48:51Z | 2020-08-28T22:30:14Z | CONTRIBUTOR | Is there a way to make `.insert_all()` work properly when new columns are introduced outside the first 100 records (with or without the `alter=True` argument)? I'm using `.insert_all()` to bulk insert ~3-4k records at a time and it is common for records to need to introduce new columns. However, if new columns are introduced after the first 100 records, `sqlite_utils` doesn't even raise the `OperationalError: table ... has no column named ...` exception; it just silently drops the extra data and moves on. It took me a while to find this little snippet in the [documentation for `.insert_all()`](https://sqlite-utils.readthedocs.io/en/stable/python-api.html#bulk-inserts) (it's not mentioned under [Adding columns automatically on insert/update](https://sqlite-utils.readthedocs.io/en/stable/python-api.html#bulk-inserts)): > The column types used in the CREATE TABLE statement are automatically derived from the types of data in that first batch of rows. **_Any additional or missing columns in subsequent batches will be ignored._** I tried changing the `batch_size` argument to the total number of records, but it seems only to effect the number of rows that are committed at a time, and has no influence on this problem. Is there a way around this that you would suggest? It seems like it should raise an exception at least. | 140912432 | issue | {"url": "https://api.github.com/repos/simonw/sqlite-utils/issues/139/reactions", "total_count": 0, "+1": 0, "-1": 0, "laugh": 0, "hooray": 0, "confused": 0, "heart": 0, "rocket": 0, "eyes": 0} | completed |