<statement
> ::=
BEGIN <statement_list
> END
| BREAK
| CONTINUE
| CONTINUE EXECUTE
| <if_statement
>
| <while_statement
>
| <assignment_statement
>
| <case_statement
>
| RETURN
| STOP (<expression
> [,<expression>] )
| TRY <statement_list>; CATCH <statement>
| <routine_sql_statement
>