Add aggregates note

wotbrew · wotbrew · commit b19b9515de3f · 2024-09-04T17:08:28.000+01:00
diff --git a/todo.txt b/todo.txt
@@ -332,3 +332,11 @@ lmdb maxreaders
 
 Should we apply back pressure once maxreaders is reached, easy to demonstrate - spawn 1000 concurrent threads
 some of them will crash.
+
+---
+
+More aggregates:
+
+count-distinct
+all/any/not-any?
+pg: bool_or bool_and
