issues: 1553425465

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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
1553425465 I_kwDOCGYnMM5cl2Q5 522 Add COLUMN_TYPE_MAPPING for timedelta 81377 closed 0     0 2023-01-23T16:49:54Z 2023-11-04T00:49:51Z 2023-11-04T00:49:51Z NONE  

Currently trying to create a column with Python type datetime.timedelta results in an error:

```

from sqlite_utils import Database db = Database("test.db") test_tbl = db['test'] test_tbl.insert({'col1': datetime.timedelta()}) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/local/lib/python3.10/dist-packages/sqlite_utils/db.py", line 2979, in insert return self.insert_all( File "/usr/local/lib/python3.10/dist-packages/sqlite_utils/db.py", line 3082, in insert_all self.create( File "/usr/local/lib/python3.10/dist-packages/sqlite_utils/db.py", line 1574, in create self.db.create_table( File "/usr/local/lib/python3.10/dist-packages/sqlite_utils/db.py", line 961, in create_table sql = self.create_table_sql( File "/usr/local/lib/python3.10/dist-packages/sqlite_utils/db.py", line 852, in create_table_sql column_type=COLUMN_TYPE_MAPPING[column_type], KeyError: <class 'datetime.timedelta'> ```

The reason this would be useful is that MySQLdb uses timedelta for MySQL TIME columns:

```

import MySQLdb conn = MySQLdb.connect(host='database', user='user', passwd='pw') csr = conn.cursor() csr.execute("SELECT CAST('11:20' AS TIME)") tuple(csr) ((datetime.timedelta(seconds=40800),),) ```

So currently any attempt to convert a MySQL DB with a TIME column using db-to-sqlite will result in the above error.

I was rather surprised that MySQLdb uses timedelta for TIME columns but I see that this column type is intended for time intervals as well as the time of day so it makes sense.

140912432 issue     
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