How to add new tokens into PostgreSQL? -


i add more tokens such open postgresql, procedure should follow? did not find corresponding documents. thanks.

(assuming mean "the postgresql server" not "the command line client psql , "token" mean "sql command / statement type"):

... yeah, that's not super simple.

if it's utility command not require query planning isn't super hard. can take existing utility commands guidance on how work. they're quite different though. start processutility.

if it's intended produce query plan, select, insert, update, delete, create table as, etc ... well, tends lot more complicated.

this sort of thing require quality time reading postgresql source code , developer documentation. it's way complex give step-by-step how-to here, since have not explained command wish add supposed do.

if @ possible should develop functionality need user defined function first. start pl/pgsql, pl/perl, or whatever, , if hit limitations of develop c extension.

once have functionality want c functions, then think whether makes sense extend actual sql syntax.


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