this is really nice. i am glad the author put it together. i didn't know the pg docs were 3200 pages long! i have been using it for a while and try to learn as

this is really nice. i am glad the author put it together. i didn't know the pg docs were 3200 pages long! i have been using it for a while and try to learn as i go. i really do like the docs. and i also like to read articles on various particular subjects as i find a need to. i think the author might find it helpful to readers to add a note to https://challahscript.com/what_i_wish_someone_told_me_about_postgres#when-indexing-multiple-columns-the-order-matters https://challahscript.com/what_i_wish_someone_told_me_about_... that if someone is selecting for b alone, then an index on columns (b, a) would work fine. i think this is kind of implied when they talk about selecting on a alone, but maybe it wouldn't hurt to be extra explicit. (i didn't spend much time on the json/jsonb part since i rarely use that stuff)