At the moment the IF EXISTS and IF NOT EXISTS are implemented inside various ao. DROP, CREATE and ALTER statements which is a nice extension to standard SQL, but for example an implementation that I'm missing for my use case would be (using the current syntax): ALTER TABLE <table-name> IF EXISTS RENAME TO <new-table-name></new-table-name></table-name> But instead of having the IF (NOT) EXISTS intertwined within existing statements and the complexity of parsing and validating all that), I much rather...