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. 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 . Sometimes from the context, one may find out how it is meant. In other cases it not so clear . Well do you have a definition or third party standard? Thank you very much,Peter Korim.
