The following documentation comment has been logged on the website: Page: https://www.postgresql.org/docs/14/indexes-index-only-scans.html Description:
11.9.2 lists ```SELECT x FROM tab WHERE x = 'key' AND z < 42;``` as both examples of 'could' and 'could not' use index-only scans. I believe this is what was meant: """"""""""""""""""" but these queries could not: SELECT x, z FROM tab WHERE x = 'key'; SELECT x FROM tab WHERE x = 'key' AND z < 42; """"""""""""""""""" should read: """"""""""""""""""" but these queries could not: SELECT x, z FROM tab WHERE x = 'key'; SELECT z FROM tab WHERE x = 'key' AND z < 42; """""""""""""""""""