"column_header" is somehow redundant with "tuples_only". Use the existing one instead of adding a new one?
It is different - a result of tuples_only is just tuples - not column names, not title, footer. I needed new special flag for enhancing tuples_only to print column names
I do not understand. If you keep the special print_raw function, it can use tuples_only as true for without column names, and false for with column names?
yes - in this case you have true.
More generally, ISTM that the same effect could be achieved without adding a new print function, but by setting more options (separator, ...) and calling an existing print function. If so, I think it would reduce the code size.
Maybe, maybe not. removing PRINT_RAW you need to enhance PRINT_UNALIGNED to use one shot parameters and you have to teach it to print column names in tuples_only mode. The code's length will be same. The form of this patch is not final.
Hmmm. Ok. It depends on the change implication on the print unaligned function.
It is open - I'll wait to winter commitfest for some other ideas, tests, comments - it is topic for PostgreSQL 11, and then there are a time for discussion
Now, I'll be happy if some other people will test it with larger set of applications and send me a feedback.
