PostgreSQL Asynchronous Commit that can be used in a similar way to Mongo's j: false; significantly speeding up writes, at the risk of losing most recent data modifications: https://www.postgresql.org/docs/current/wal-async-commit.html. There also are Unlogged Tables, with changes not written to the WAL (Write Ahead Log): https://www.crunchydata.com/blog/postgresl-unlogged-tables
There is a special form for boolean formulas called "Conjunctive Normal Form" (CNF). A problem in this form consists of clauses connected with and operators, where each clause only contains variables connected with or operators. The variables can appear negated, but only variables can be directly negated, something like !(a && b) is not allowed. An example boolean formula in CNF form is:
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На помощь российским туристам на Ближнем Востоке ушли миллиарды рублей20:47
Code dump for 2.16