[tarantool-patches] Re: [PATCH] sql: raise err on CHECK + ON CONFLICT REPLACE

["n.pettik" <korablev@tarantool.org>]

> On 4 Feb 2019, at 17:44, Ivan Koptelov <ivan.koptelov@tarantool.org> wrote:
> 
> Adds error raise in case of CHECK constraint declared with ON
> CONFLICT REPLACE action. Before the patch such option was
> forbidden, but if a user tried to create space with such constraint,
> this attempt failed silently.
> 

What is more, now all on conflict actions are ignored for check
constraints. So lets simply fix parser to disallow this clause.
It is quite easy: all you need is to remove onconf rule after CHECK
keyword:

   319	tcons ::= CHECK LP expr(E) RP onconf.
   320	                                 {sql_add_check_constraint(pParse,&E);}