<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>