SQL/MX 2.x Reference Manual (H06.04+)

Embedded-Only SQL/MX Statements

HP NonStop SQL/MX Reference Manual—540440-003

3-75

SET (Assignment) Statement

C Examples of Assignment Statement

An assignment statement in a compound statement assigns a value to a host variable

so that subsequent statements in the containing compound statement can reference

and use the value of that host variable.

SET is an SQL/MX extension that you use only in embedded SQL programs in C or

COBOL.

assignment-target

specifies a list of host variable specifications in which to return the values in the

assignment-source.

The number of items in assignment-source must be equal to the number of

specified host variables, and the data type of each source value must be

compatible with the data type of its target host variable.The first value in the

assignment-source is assigned to the first host variable, the second value to

the second variable, and so on.

You can use rowset host variables as assignment-targets if either the

assignment-source is a subquery that returns more than one row, or the

assignment-source includes rowset-expressions. In this case you can use

rowset host variables in the assignment-target to return values from multiple

consecutive rows in the assignment-source.

The values of the host variables that have been set by an assignment statement

are made available for use by subsequent statements within the compound

statement and by other statements that follow after that compound statement.

:variable-name [[INDICATOR] :indicator-name]

is a variable specification—a host variable with optionally an indicator variable.

A variable name begins with a colon (:).

SET assignment-target = assignment-source

assignment-target is:

variable-spec [,variable-spec]...

assignment-source is:

subquery

| {expression | rowset-expression | NULL}

[,{expression | rowset-expression | NULL]...

C/COBOL