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
1171599874,I_kwDOCGYnMM5F1TIC,415,Convert with `--multi` and `--dry-run` flag does not work,3976183,closed,0,,,2,2022-03-16T21:59:46Z,2022-03-21T04:18:24Z,2022-03-21T04:18:24Z,NONE,,"It's not possible to combine `--multi` and `--dry-run` flag in the `convert` command.

Let's first create a simple database from JSON string

```console
$ echo '[{""foo"": ""abc""}]' | sqlite-utils insert demo.db demo -
$ sqlite-utils query demo.db ""SELECT * FROM demo""             
[{""foo"": ""abc""}]
```

and then try to convert the ""foo"" column with a static value ""bar"" (see docs [Converting a column into multiple columns](https://sqlite-utils.datasette.io/en/stable/cli.html#converting-a-column-into-multiple-columns))

```console
$ sqlite-utils convert demo.db demo foo '{""foo"": ""bar""}' --multi --dry-run
Traceback (most recent call last):
  File ""/home/dotcs/anaconda3/envs/tools/bin/sqlite-utils"", line 8, in <module>
    sys.exit(cli())
  File ""/home/dotcs/anaconda3/envs/tools/lib/python3.9/site-packages/click/core.py"", line 1128, in __call__
    return self.main(*args, **kwargs)
  File ""/home/dotcs/anaconda3/envs/tools/lib/python3.9/site-packages/click/core.py"", line 1053, in main
    rv = self.invoke(ctx)
  File ""/home/dotcs/anaconda3/envs/tools/lib/python3.9/site-packages/click/core.py"", line 1659, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File ""/home/dotcs/anaconda3/envs/tools/lib/python3.9/site-packages/click/core.py"", line 1395, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File ""/home/dotcs/anaconda3/envs/tools/lib/python3.9/site-packages/click/core.py"", line 754, in invoke
    return __callback(*args, **kwargs)
  File ""/home/dotcs/anaconda3/envs/tools/lib/python3.9/site-packages/sqlite_utils/cli.py"", line 2686, in convert
    for row in db.conn.execute(sql, where_args).fetchall():
sqlite3.OperationalError: user-defined function raised exception
```

But without the `--dry-run` flag it does work as expected:

```console
$ sqlite-utils convert demo.db demo foo '{""foo"": ""bar""}' --multi
$ sqlite-utils query demo.db ""SELECT * FROM demo""               
[{""foo"": ""bar""}]
```

```console
$ sqlite-utils --version
sqlite-utils, version 3.25.1
```",140912432,issue,,,"{""url"": ""https://api.github.com/repos/simonw/sqlite-utils/issues/415/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed