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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
PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download/ See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.