Re: [Patch]Add tab completion for DELETE ... USING

Hi!

Thank you for your review!

> HI! What makes you think we need additional tab completion tests at all?
> If we consult src/bin/psql changes history [0], it can be easily seen
> that not every change to tab-complete.in.c is made with a new test.
> This is (my own understanding, I may be wrong) because we only need to
> test tab-complete patterns that are functionally different, not mirror
> all cases from tab-complete.in.c  in the TAP test.

I agree that not every tab-complete change requires tests, and we don't need to mirror all cases from tab-complete.in.c. I also think tests that provide little benefit compared to their maintenance cost can be omitted. However, since this patch implements a previously unimplemented feature (removing a XXX TODO comment), I believe the primary test cases should be kept to verify the core functionality and prevent regressions.
That said, I can reduce the test cases. The current 4 tests could be reduced to 2:

One for USING <TAB> (core functionality: table completion)
One for USING <table> <TAB> (keyword completion after table)

WDYT?

Regards,
Tatsuya Kawata