SETvar_name
=expr
[,var_name
=expr
] ...
The SET
statement in stored programs is an
extended version of the general
SET
statement (see Section 12.4.4, “SET
Syntax”). Each
var_name
may refer to a local
variable declared inside a stored program, a system variable, or
a user-defined variable.
The SET
statement in stored programs is
implemented as part of the pre-existing
SET
syntax. This allows an extended syntax of SET a=x, b=y,
...
where different variable types (locally declared
variables, global and session system variables, user-defined
variables) can be mixed. This also allows combinations of local
variables and some options that make sense only for system
variables; in that case, the options are recognized but ignored.
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