13.6.1 BEGIN ... END Compound Statement
[begin_label:] BEGIN [statement_list] END [end_label]
BEGIN ... END syntax is used for writing compound statements, which can appear within stored programs (stored procedures and functions, triggers, and events). A compound statement can contain multiple statements, enclosed by the
statement_list represents a list of one or more statements, each terminated by a semicolon (
;) statement delimiter. The
statement_list itself is optional, so the empty compound statement (
BEGIN END) is legal.
BEGIN ... END blocks can be nested.
Use of multiple statements requires that a client is able to send statement strings containing the
; statement delimiter. In the mysql command-line client, this is handled with the
delimiter command. Changing the
; end-of-statement delimiter (for example, to
; to be used in a program body. For an example, see Section 23.1, “Defining Stored Programs”.
[NOT] ATOMIC clause is not supported. This means that no transactional savepoint is set at the start of the instruction block and the
BEGIN clause used in this context has no effect on the current transaction.