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
1219385669,I_kwDOBm6k_c5IrllF,1729,Implement ?_extra and new API design for TableView,9599,open,0,,8755003,12,2022-04-28T22:28:14Z,2022-12-13T05:29:07Z,,OWNER,,"Part of:
- #262
- #1518",107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/1729/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,
1218133366,I_kwDOBm6k_c5Imz12,1728,Writable canned queries fail with useless non-error against immutable databases,127565,closed,0,,8303187,13,2022-04-28T03:10:34Z,2022-08-14T16:34:40Z,2022-08-14T16:34:40Z,CONTRIBUTOR,,"I've been banging my head against a wall for a while and would appreciate any pointers...

- I have a writeable canned query to update rows in the db. 
- I'm using the github-oauth plugin for authentication. 
- I have `allow` set on the query to accept my GitHub id and a GH organisation. 
- Authentication seems to work as expected both locally and on Cloudrun -- viewing `/-/actor` gives the same result in both environments
- I can access the 'padlocked' canned query in both environments.

Everything seems to be the same, but the canned query works perfectly when run locally, and fails when I try it on Cloudrun. I'm redirected back to the canned query page and the db is not changed. There's nothing in the Cloudstor logs to indicate an error.

Any clues as to where I should be looking for the problem?",107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/1728/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed
1219398983,I_kwDOBm6k_c5Iro1H,1730,SQL tracing should much more closely track the SQL query execution,9599,open,0,,,0,2022-04-28T22:41:04Z,2022-04-28T22:41:10Z,,OWNER,,"In #1727 I realized that the SQL tracing was measuring a whole bunch of stuff outside of the SQL query itself.

I started experimenting with this fix for that but it didn't work - I got back an empty JSON array of traces for some reason:

```diff
diff --git a/datasette/database.py b/datasette/database.py
index ba594a8..d7f9172 100644
--- a/datasette/database.py
+++ b/datasette/database.py
@@ -7,7 +7,7 @@ import sys
 import threading
 import uuid
 
-from .tracer import trace
+from .tracer import trace, trace_child_tasks
 from .utils import (
     detect_fts,
     detect_primary_keys,
@@ -207,30 +207,31 @@ class Database:
                 time_limit_ms = custom_time_limit
 
             with sqlite_timelimit(conn, time_limit_ms):
-                try:
-                    cursor = conn.cursor()
-                    cursor.execute(sql, params if params is not None else {})
-                    max_returned_rows = self.ds.max_returned_rows
-                    if max_returned_rows == page_size:
-                        max_returned_rows += 1
-                    if max_returned_rows and truncate:
-                        rows = cursor.fetchmany(max_returned_rows + 1)
-                        truncated = len(rows) > max_returned_rows
-                        rows = rows[:max_returned_rows]
-                    else:
-                        rows = cursor.fetchall()
-                        truncated = False
-                except (sqlite3.OperationalError, sqlite3.DatabaseError) as e:
-                    if e.args == (""interrupted"",):
-                        raise QueryInterrupted(e, sql, params)
-                    if log_sql_errors:
-                        sys.stderr.write(
-                            ""ERROR: conn={}, sql = {}, params = {}: {}\n"".format(
-                                conn, repr(sql), params, e
+                with trace(""sql"", database=self.name, sql=sql.strip(), params=params):
+                    try:
+                        cursor = conn.cursor()
+                        cursor.execute(sql, params if params is not None else {})
+                        max_returned_rows = self.ds.max_returned_rows
+                        if max_returned_rows == page_size:
+                            max_returned_rows += 1
+                        if max_returned_rows and truncate:
+                            rows = cursor.fetchmany(max_returned_rows + 1)
+                            truncated = len(rows) > max_returned_rows
+                            rows = rows[:max_returned_rows]
+                        else:
+                            rows = cursor.fetchall()
+                            truncated = False
+                    except (sqlite3.OperationalError, sqlite3.DatabaseError) as e:
+                        if e.args == (""interrupted"",):
+                            raise QueryInterrupted(e, sql, params)
+                        if log_sql_errors:
+                            sys.stderr.write(
+                                ""ERROR: conn={}, sql = {}, params = {}: {}\n"".format(
+                                    conn, repr(sql), params, e
+                                )
                             )
-                        )
-                        sys.stderr.flush()
-                    raise
+                            sys.stderr.flush()
+                        raise
 
             if truncate:
                 return Results(rows, truncated, cursor.description)
@@ -238,9 +239,8 @@ class Database:
             else:
                 return Results(rows, False, cursor.description)
 
-        with trace(""sql"", database=self.name, sql=sql.strip(), params=params):
-            results = await self.execute_fn(sql_operation_in_thread)
-        return results
+        with trace_child_tasks():
+            return await self.execute_fn(sql_operation_in_thread)
 
     @property
     def size(self):
```

_Originally posted by @simonw in https://github.com/simonw/datasette/issues/1727#issuecomment-1111602802_",107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/1730/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,