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
644161221,MDU6SXNzdWU2NDQxNjEyMjE=,117,Support for compound (composite) foreign keys,9599,open,0,,,3,2020-06-23T21:33:42Z,2020-06-23T21:40:31Z,,OWNER,,"It turns out SQLite supports composite foreign keys: https://www.sqlite.org/foreignkeys.html#fk_composite

Their example looks like this:
```sql
CREATE TABLE album(
  albumartist TEXT,
  albumname TEXT,
  albumcover BINARY,
  PRIMARY KEY(albumartist, albumname)
);

CREATE TABLE song(
  songid     INTEGER,
  songartist TEXT,
  songalbum TEXT,
  songname   TEXT,
  FOREIGN KEY(songartist, songalbum) REFERENCES album(albumartist, albumname)
);
```

Here's what that looks like in sqlite-utils:

```
In [1]: import sqlite_utils                                                                                                                

In [2]: import sqlite3                                                                                                                     

In [3]: conn = sqlite3.connect("":memory:"")                                                                                                 

In [4]: conn                                                                                                                               
Out[4]: <sqlite3.Connection at 0x1087186c0>

In [5]: conn.executescript("""""" 
   ...: CREATE TABLE album( 
   ...:   albumartist TEXT, 
   ...:   albumname TEXT, 
   ...:   albumcover BINARY, 
   ...:   PRIMARY KEY(albumartist, albumname) 
   ...: ); 
   ...:  
   ...: CREATE TABLE song( 
   ...:   songid     INTEGER, 
   ...:   songartist TEXT, 
   ...:   songalbum TEXT, 
   ...:   songname   TEXT, 
   ...:   FOREIGN KEY(songartist, songalbum) REFERENCES album(albumartist, albumname) 
   ...: ); 
   ...: """""")                                                                                                                               
Out[5]: <sqlite3.Cursor at 0x1088def10>

In [6]: db = sqlite_utils.Database(conn)                                                                                                   

In [7]: db.tables                                                                                                                          
Out[7]: 
[<Table album (albumartist, albumname, albumcover)>,
 <Table song (songid, songartist, songalbum, songname)>]

In [8]: db.tables[0].foreign_keys                                                                                                          
Out[8]: []

In [9]: db.tables[1].foreign_keys                                                                                                          
Out[9]: 
[ForeignKey(table='song', column='songartist', other_table='album', other_column='albumartist'),
 ForeignKey(table='song', column='songalbum', other_table='album', other_column='albumname')]
```
The table appears to have two separate foreign keys, when actually it has a single compound composite foreign key.",140912432,issue,,,"{""url"": ""https://api.github.com/repos/simonw/sqlite-utils/issues/117/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,