#### Number of rows affected Design notes with mentions ~652 ```sql explain select id from notes where noteable_type = ‘DesignManagement::Design’ and note like ‘%\@%’ Index Scan using index_notes_on_noteable_id_and_noteable_type on public.notes (cost=0.57..4519075.97 rows=3936 width=4) (actual time=7.361..952352.359 rows=652 loops=1) Index Cond: ((notes.noteable_type)::text = 'DesignManagement::Design'::text) Filter: (notes.note ~~ '%\@%'::text) Rows Removed by Filter: 1535 Buffers: shared hit=107 read=1362816 dirtied=17 I/O Timings: read=938952.612 ```