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
828858421,MDU6SXNzdWU4Mjg4NTg0MjE=,1258,Allow canned query params to specify default values,1385831,open,0,,,5,2021-03-11T07:19:02Z,2023-02-20T23:39:58Z,,NONE,,"If I call a canned query that includes named parameters, without passing any parameters, datasette runs the query anyway, resulting in an HTTP status code 400, and a visible error in the browser, with only a link back to home.  This means that one of the default links on https://site/database/ will lead to a broken page with no apparent way out.

![image](https://user-images.githubusercontent.com/1385831/110748683-13e72300-820e-11eb-855c-32e03dfef5bf.png)

Is there any way to skip performing the query when parameters aren't supplied, but otherwise render the usual canned query page?  Alternatively, can I supply default values for my parameters, either when defining my canned queries or when linking to the canned query page from the default database template.",107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/1258/reactions"", ""total_count"": 1, ""+1"": 1, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,
1212701569,I_kwDOCGYnMM5ISFuB,427,"sqlite-utils convert date parsing recipe complains about trying to parse ""*""",1385831,closed,0,,,1,2022-04-22T19:27:10Z,2022-07-02T13:59:59Z,2022-07-02T13:59:32Z,NONE,,"Missing values in my dataset are denoted by a single asterisk.  I am trying to parse string dates into dates.  This works fine for columns without missing values, but, when the column contains ""*"", I get the following:

```
$ sqlite-utils convert ${dbfile} details dob 'r.parsedate(value)' 
  [------------------------------------]    0%Traceback (most recent call last):
  File ""/usr/local/Cellar/sqlite-utils/3.25.1/libexec/lib/python3.9/site-packages/sqlite_utils/db.py"", line 2508, in convert_value
    return fn(v)
  File ""<string>"", line 2, in fn
  File ""/usr/local/Cellar/sqlite-utils/3.25.1/libexec/lib/python3.9/site-packages/sqlite_utils/recipes.py"", line 8, in parsedate
    parser.parse(value, dayfirst=dayfirst, yearfirst=yearfirst).date().isoformat()
  File ""/usr/local/Cellar/sqlite-utils/3.25.1/libexec/lib/python3.9/site-packages/dateutil/parser/_parser.py"", line 1368, in parse
    return DEFAULTPARSER.parse(timestr, **kwargs)
  File ""/usr/local/Cellar/sqlite-utils/3.25.1/libexec/lib/python3.9/site-packages/dateutil/parser/_parser.py"", line 643, in parse
    raise ParserError(""Unknown string format: %s"", timestr)
dateutil.parser._parser.ParserError: Unknown string format: *

Traceback (most recent call last):
  File ""/usr/local/bin/sqlite-utils"", line 33, in <module>
    sys.exit(load_entry_point('sqlite-utils==3.25.1', 'console_scripts', 'sqlite-utils')())
  File ""/usr/local/Cellar/sqlite-utils/3.25.1/libexec/lib/python3.9/site-packages/click/core.py"", line 1128, in __call__
    return self.main(*args, **kwargs)
  File ""/usr/local/Cellar/sqlite-utils/3.25.1/libexec/lib/python3.9/site-packages/click/core.py"", line 1053, in main
    rv = self.invoke(ctx)
  File ""/usr/local/Cellar/sqlite-utils/3.25.1/libexec/lib/python3.9/site-packages/click/core.py"", line 1659, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File ""/usr/local/Cellar/sqlite-utils/3.25.1/libexec/lib/python3.9/site-packages/click/core.py"", line 1395, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File ""/usr/local/Cellar/sqlite-utils/3.25.1/libexec/lib/python3.9/site-packages/click/core.py"", line 754, in invoke
    return __callback(*args, **kwargs)
  File ""/usr/local/Cellar/sqlite-utils/3.25.1/libexec/lib/python3.9/site-packages/sqlite_utils/cli.py"", line 2698, in convert
    db[table].convert(
  File ""/usr/local/Cellar/sqlite-utils/3.25.1/libexec/lib/python3.9/site-packages/sqlite_utils/db.py"", line 2524, in convert
    self.db.execute(sql, where_args or [])
  File ""/usr/local/Cellar/sqlite-utils/3.25.1/libexec/lib/python3.9/site-packages/sqlite_utils/db.py"", line 458, in execute
    return self.conn.execute(sql, parameters)
sqlite3.OperationalError: user-defined function raised exception
```


",140912432,issue,,,"{""url"": ""https://api.github.com/repos/simonw/sqlite-utils/issues/427/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed