When writing an example for MediaWiki here, the identifier "user" throwed an exception because it is a reserved word in standard SQL.

→ The reserved words should become dialect-specific to throw exceptions only according to a configuration parameter.

This configuration parameter is set at compile time to describe all supported dialects ("supported" by the software), and it may act either at compile time to throw an exception in case of reserved word either at runtime to quote a reserved word (which may be quoted) as described in #2.