digit ::= "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9"
This rule is called by -> hexit -> id_part -> sql_language_char -> sql_language_id_part -> unsigned_integer
-> hexit -> id_part -> sql_language_char -> sql_language_id_part -> unsigned_integer