reparse as JSON, fix #98

SQLite 3.39 is stricter about serializing things to TEXT format
when it escapes a subquery/CTE. Adding json(...) is compatible
on the newer versions and the older versions

I guess to test this we could run tests with multiple versions
of pysqlite3-binary? Seems kinda unfortunate :(

datasette_ui_extras/column_stats.py

@@ -483,7 +483,7 @@ def update_distincts(conn, table_id, column_id, sql, where_args):
 GROUP BY 1, 2
 ORDER BY 3 DESC
 )
-SELECT value, hash, count, (select json_group_array(value) from (select value from json_each(keys) limit 10)) AS keys
+SELECT value, hash, count, (select json_group_array(json(value)) from (select value from json_each(keys) limit 10)) AS keys
 FROM distincts
 '''.format(sql)
 
@@ -522,7 +522,7 @@ def update_json_distincts(conn, table_id, column_id, sql, where_args):
 GROUP BY 1, 2
 ORDER BY 3 DESC
 )
-SELECT value, hash, count, (select json_group_array(value) from (select value from json_each(keys) limit 10)) AS keys
+SELECT value, hash, count, (select json_group_array(json(value)) from (select value from json_each(keys) limit 10)) AS keys
 FROM distincts
 '''.format(sql)
 

metadata.json

@@ -67,7 +67,13 @@
                 "insert-row": true,
                 "update-row": true,
                 "delete-row": true
+            },
+            "tables": {
+                "users": {
+                    "label_column": "display_name"
+                }
             }
+
         }
     },
     "plugins": {