The Ultimate Guide to High Availability with MariaDB

DECLARE Variable

You are viewing an old version of this article. View the current version here.

Syntax

DECLARE var_name [, var_name] ... type [DEFAULT value]

Description

This statement is used to declare local variables within stored programs. To provide a default value for the variable, include a DEFAULT clause. The value can be specified as an expression (even subqueries are permitted); it need not be a constant. If the DEFAULT clause is missing, the initial value is NULL.

Local variables are treated like stored routine parameters with respect to data type and overflow checking. See CREATE PROCEDURE.

Local variables must be declared before CONDITIONs, CURSORs and HANDLERs.

Local variable names are not case sensitive.

The scope of a local variable is within the BEGIN ... END block where it is declared. The variable can be referred to in blocks nested within the declaring block, except those blocks that declare a variable with the same name.

See also

Comments

Comments loading...
Content reproduced on this site is the property of its respective owners, and this content is not reviewed in advance by MariaDB. The views, information and opinions expressed by this content do not necessarily represent those of MariaDB or any other party.