html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,issue,performed_via_github_app
https://github.com/simonw/sqlite-utils/issues/335#issuecomment-968359137,https://api.github.com/repos/simonw/sqlite-utils/issues/335,968359137,IC_kwDOCGYnMM45t_zh,9599,2021-11-14T20:37:00Z,2021-11-14T20:37:00Z,OWNER,This is strange - the code already checks that an index doesn't exist before attempting to create it: https://github.com/simonw/sqlite-utils/blob/92aa5c9c5d26b0889c8c3d97c76a908d5f8af211/sqlite_utils/db.py#L893-L902,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1042569687,
https://github.com/simonw/sqlite-utils/issues/335#issuecomment-968359868,https://api.github.com/repos/simonw/sqlite-utils/issues/335,968359868,IC_kwDOCGYnMM45t_-8,9599,2021-11-14T20:41:42Z,2021-11-14T20:41:42Z,OWNER,"The ""index idx_generators_eia860_report_date already exists"" error suggests that the problem here is actually one of an index name collision.
```python
table.create_index([fk.column])
```
This will derive a name for the index automatically from the name of the table and the name of the passed in columns: https://github.com/simonw/sqlite-utils/blob/92aa5c9c5d26b0889c8c3d97c76a908d5f8af211/sqlite_utils/db.py#L1536-L1539
So perhaps `.create_index()` should grow an extra option that creates the index even if the name already exists, by finding a new name.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1042569687,
https://github.com/simonw/sqlite-utils/issues/335#issuecomment-968360387,https://api.github.com/repos/simonw/sqlite-utils/issues/335,968360387,IC_kwDOCGYnMM45uAHD,9599,2021-11-14T20:45:44Z,2021-11-14T20:45:44Z,OWNER,"What would such an option be called? Some options:
- `table.create_index([fk.column], force=True)` - not obvious what `force` means here
- `table.create_index([fk.column], ignore_existing_name=True)` - not obvious what `ignore` means here
- `table.create_index([fk.column], pick_unique_name=True)` - bit verbose
If the user doesn't pass in an explicit name it seems like their intent is ""just create me the index, I don't care what name you use"" - so actually perhaps the default behaviour here should be to pick a new unique name if that name is already in use.
Then maybe there should be an option to disable that - some options there:
- `table.create_index([fk.column], error_on_existing_index_name=True)` - too verbose
- `table.create_index([fk.column], force=False)` - not clear what `force` means
","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1042569687,
https://github.com/simonw/sqlite-utils/issues/335#issuecomment-968360538,https://api.github.com/repos/simonw/sqlite-utils/issues/335,968360538,IC_kwDOCGYnMM45uAJa,9599,2021-11-14T20:46:56Z,2021-11-14T20:46:56Z,OWNER,"I'm tempted to not provide an opt-out option either: if you call `table.create_index(...)` without specifying an index name I think the tool should create the index for you, quietly picking an index name that works.
But... it feels wasteful to create an index that exactly duplicates an existing index. Would SQLite even let you do that or would it notice and NOT double the amount of disk space used for that index?","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1042569687,
https://github.com/simonw/sqlite-utils/issues/335#issuecomment-968361285,https://api.github.com/repos/simonw/sqlite-utils/issues/335,968361285,IC_kwDOCGYnMM45uAVF,9599,2021-11-14T20:51:57Z,2021-11-14T20:51:57Z,OWNER,"SQLite will happily create multiple identical indexes on a table, using more disk space each time:
```pycon
>>> import sqlite_utils
>>> db = sqlite_utils.Database(""dupes.db"")
>>> db[""t""].insert_all({""id"": i} for i in range(10000))
# dupes.db is 98304 bytes
>>> db[""t""].create_index([""id""])
# dupes.db is 204800 bytes
>>> db[""t""].indexes
[Index(seq=0, name='idx_t_id', unique=0, origin='c', partial=0, columns=['id'])]
>>> db[""t""].create_index([""id""], index_name=""t_idx_t_id_2"")
# 311296 bytes
>>> db[""t""].create_index([""id""], index_name=""t_idx_t_id_3"")
# 417792 bytes
>>> db.vacuum()
# Still 417792 bytes
```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1042569687,
https://github.com/simonw/sqlite-utils/issues/335#issuecomment-968361409,https://api.github.com/repos/simonw/sqlite-utils/issues/335,968361409,IC_kwDOCGYnMM45uAXB,9599,2021-11-14T20:52:55Z,2021-11-14T20:52:55Z,OWNER,"Looking at the method signature: https://github.com/simonw/sqlite-utils/blob/92aa5c9c5d26b0889c8c3d97c76a908d5f8af211/sqlite_utils/db.py#L1518-L1524
`if_not_exists` just adds a `IF NOT EXISTS` clause here: https://github.com/simonw/sqlite-utils/blob/92aa5c9c5d26b0889c8c3d97c76a908d5f8af211/sqlite_utils/db.py#L1549-L1561","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1042569687,
https://github.com/simonw/sqlite-utils/issues/335#issuecomment-968361671,https://api.github.com/repos/simonw/sqlite-utils/issues/335,968361671,IC_kwDOCGYnMM45uAbH,9599,2021-11-14T20:54:53Z,2021-11-14T21:01:14Z,OWNER,"I'm leaning towards `table.create_index(columns, ignore_existing_name=True)` now.
Or `resolve_existing_name` - or `skip_existing_name`?
""ignore"" sounds like it might not create the index if the name exists, but we want to still create the index but pick a new name.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1042569687,
https://github.com/simonw/sqlite-utils/issues/335#issuecomment-968362214,https://api.github.com/repos/simonw/sqlite-utils/issues/335,968362214,IC_kwDOCGYnMM45uAjm,9599,2021-11-14T20:59:15Z,2021-11-14T20:59:15Z,OWNER,"How to figure out if an index name is already in use? `PRAGMA index_list(t)` requires a table name. This does it:
```sql
SELECT name
FROM sqlite_master
WHERE type = 'index';
```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1042569687,
https://github.com/simonw/sqlite-utils/issues/335#issuecomment-968362285,https://api.github.com/repos/simonw/sqlite-utils/issues/335,968362285,IC_kwDOCGYnMM45uAkt,9599,2021-11-14T20:59:44Z,2021-11-14T20:59:44Z,OWNER,I think I'll attempt to create the index and re-try if it fails with that error.,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1042569687,
https://github.com/simonw/sqlite-utils/issues/335#issuecomment-968371112,https://api.github.com/repos/simonw/sqlite-utils/issues/335,968371112,IC_kwDOCGYnMM45uCuo,9599,2021-11-14T21:57:43Z,2021-11-14T22:21:31Z,OWNER,"`create_index(..., find_unique_name=)` is good. Default to false. `index_foreign_keys` can set it to true.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1042569687,
https://github.com/simonw/sqlite-utils/issues/335#issuecomment-968380387,https://api.github.com/repos/simonw/sqlite-utils/issues/335,968380387,IC_kwDOCGYnMM45uE_j,9599,2021-11-14T22:55:56Z,2021-11-14T22:55:56Z,OWNER,"OK, this should fix it.","{""total_count"": 1, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 1, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1042569687,