On Friday, May 11, 2018, Peter Korim <pko...@gmail.com> wrote: > Hallo > > I search for it and did notsucceeded. > Where is exact definition of the grammar used here? > > I thing the text "[,...]" is unclear concerning what is to be repeted. >
Not that I've found, do you have an example? > > here: > *https://www.postgresql.org/docs/9.6/static/notation.html > <https://www.postgresql.org/docs/9.6/static/notation.html>* > you state > *" Dots (...) mean that the preceding element can be repeated. "* > > from that definition the fragment "[,...]" means zero or more commas. > > It is often so that not one element but several elements are repeated . > In which case each one requires a comma separating it from the previous one. > > Sometimes from the context, one may find out how it is meant. > > In other cases it not so clear. > Again, You will need to point out an example. But not all options that allow multiples require commas to separate them. > > Well do you have a definition or third party standard? > > You linked to it above... David J.
