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
1042569687,I_kwDOCGYnMM4-JFnX,335,sqlite-utils index-foreign-keys fails due to pre-existing index,596279,closed,0,,,11,2021-11-02T16:22:11Z,2021-11-14T22:55:56Z,2021-11-14T22:55:56Z,NONE,,"While running the command:
```sh
sqlite-utils index-foreign-keys $SQLITE_DIR/pudl.sqlite
```

I got the following error:

```
Traceback (most recent call last):
  File ""/home/zane/miniconda3/envs/pudl-dev/bin/sqlite-utils"", line 8, in <module>
    sys.exit(cli())
  File ""/home/zane/miniconda3/envs/pudl-dev/lib/python3.9/site-packages/click/core.py"", line 829, in __call__
    return self.main(*args, **kwargs)
  File ""/home/zane/miniconda3/envs/pudl-dev/lib/python3.9/site-packages/click/core.py"", line 782, in main
    rv = self.invoke(ctx)
  File ""/home/zane/miniconda3/envs/pudl-dev/lib/python3.9/site-packages/click/core.py"", line 1259, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File ""/home/zane/miniconda3/envs/pudl-dev/lib/python3.9/site-packages/click/core.py"", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File ""/home/zane/miniconda3/envs/pudl-dev/lib/python3.9/site-packages/click/core.py"", line 610, in invoke
    return callback(*args, **kwargs)
  File ""/home/zane/miniconda3/envs/pudl-dev/lib/python3.9/site-packages/sqlite_utils/cli.py"", line 454, in index_foreign_keys
    db.index_foreign_keys()
  File ""/home/zane/miniconda3/envs/pudl-dev/lib/python3.9/site-packages/sqlite_utils/db.py"", line 902, in index_foreign_keys
    table.create_index([fk.column])
  File ""/home/zane/miniconda3/envs/pudl-dev/lib/python3.9/site-packages/sqlite_utils/db.py"", line 1563, in create_index
    self.db.execute(sql)
  File ""/home/zane/miniconda3/envs/pudl-dev/lib/python3.9/site-packages/sqlite_utils/db.py"", line 421, in execute
    return self.conn.execute(sql)
sqlite3.OperationalError: index idx_generators_eia860_report_date already exists
```

This DB was created with the foreign key constraint `PRAGMA` enabled and a bunch of column-level `CHECK` constraints.  Is this an expected behavior? Should one not try to index foreign keys if FK constraints are already being enforced within the DB?

I'm also noticing that the size of the DB after FK indexes have been added went from 483MB to 835MB, which seems like a much bigger jump than when I've done this previously.

Software versions...
* sqlite-utils 3.17.1
* sqlite 3.36.0
* SQLAlchemy 1.4.26 (used to create the DB)",140912432,issue,,,"{""url"": ""https://api.github.com/repos/simonw/sqlite-utils/issues/335/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed
756818250,MDU6SXNzdWU3NTY4MTgyNTA=,1127,Make the custom SQL query text box larger or resizable,596279,closed,0,,,1,2020-12-04T05:37:11Z,2021-06-02T04:29:06Z,2021-06-02T04:28:55Z,NONE,,"The text entry field for custom SQL queries is too small to display a moderately complex query, especially when it's been formatted. Would it be easy to make the textbox resizable by the user rather than having a fixed height?",107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/1127/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed