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154e2f1015
extract_jsp_bool_expr applied De Morgan's laws incorrectly when considering an AND operator underneath a NOT. If one AND input was implementable as a GIN indexqual while the other was not, we derived an incomplete indexqual, leading to some rows not being returned that should be. extract_jsp_bool_expr also failed to check for methods being applied to literals, so that for example '$.x == "42".double()' was treated as '$.x == "42"' not '$.x == 42'. The indexqual thus selected the wrong rows, all of which would fail qual recheck, leading to no rows being returned. While we're here, improve the comments a trifle. Reported-by: Chinmay Kanchi <cgkanchi@gmail.com> Author: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://postgr.es/m/CAJqPDh9Cm=x8eYZ1Jf=_avd2WEqc=0t_f7_SO4igo-CKPi25_Q@mail.gmail.com Discussion: https://postgr.es/m/CAJqPDh-tu5KY66KU8cvAEg3DQrZLzDZwjkLLa42zD+_Xm1WJAg@mail.gmail.com Backpatch-through: 14