1431/2 PLS-00103: Encountered the symbol "BEGIN" when expecting one of

1431/2   PLS-00103: Encountered the symbol "BEGIN" when expecting one of
         the following:
         := ; not null default character
         The symbol ";" was substituted for "BEGIN" to continue.


这个错误，查看begin前是否有分号，is和begin之间的参数一定要有分号的