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/datasette/pull/1893#issuecomment-1317314064,https://api.github.com/repos/simonw/datasette/issues/1893,1317314064,IC_kwDOBm6k_c5OhJ4Q,95570,2022-11-16T16:36:46Z,2022-11-16T16:36:46Z,CONTRIBUTOR,"With

```patch
diff --git a/datasette/templates/_codemirror_foot.html b/datasette/templates/_codemirror_foot.html
index ed709b3..74fe18e 100644
--- a/datasette/templates/_codemirror_foot.html
+++ b/datasette/templates/_codemirror_foot.html
@@ -7,7 +7,11 @@
       sqlFormat.hidden = false;
     }
     if (sqlInput) {
-      var editor = (window.editor = cm.editorFromTextArea(sqlInput));
+      var editor = (window.editor = cm.editorFromTextArea(sqlInput, {
+        schema: {
+          compound_three_primary_keys: [""pk1"", ""pk2"", ""pk3"", ""content""],
+        },
+      }));
```

we get table autocompletion and column completion if you name the table in the query (see screencast). I do see bugs with escaped table names like `""'123_starts_with_digits'"": [""col1"", ""col2""]` or `""[123_starts_with_digits]"": [""col1"", ""col2""]` where it doesn't seem to pick up the column names though. I think it needs some further testing and debugging. 

https://user-images.githubusercontent.com/95570/202238521-e613b4e2-ba92-4418-9068-fc022edaee93.mp4
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