Alastair McKinley <a.mckinley@xxxxxxxxxxxxxxxxxxxx> writes: > The following function definition fails in 15beta1 (ok in 14.3): > create or replace function regexp_match_test(string text,pattern text) returns text[] as > $$ > select regexp_match(string,pattern); > $$ language sql; Commit 1a36bc9db seems to have defined STRING as a type_func_name_keyword, which strikes me as a pretty horrible trampling on user namespace. That means you can't have tables or columns named "string" anymore either, and I'll bet money the latter restriction is going to bite a lot of people. In a quick experiment here, I don't see any bison complaints if I back it down to unreserved_keyword, so this seems easily fixable. I wonder though if we don't need more review of patches that add partially- or fully-reserved keywords. regards, tom lane