Syntax

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