The SET command assigns a data type and a value to a FastExport utility variable. The SET command is a valid command preceding LOGON and LOGTABLE commands.
where:
|
Syntax Element |
Description |
|
var |
Name of the FastExport utility variable to be set to the evaluated expression |
Table 44 describes the things to consider when using the SET command.
|
Topic |
Usage Notes |
|
Declaring Variables |
Variables need not be declared in advance to be the object of the SET command. If a variable does not already exist, FastExport creates it. Variables used to the right of TO in the expression must be declared in advance. |
|
Changing the Data Type |
The SET command also dynamically changes the data type to that of the assigned value if it had already been defined. If the expression evaluates to a numeric value, the symbol is assigned an integer value, as in: .SET FOONUM TO ‑151 ;
If the expression is a quoted string, the symbol is assigned a string value, as in: .SET FOOCHAR TO ’‑151’ ;
The minimum and maximum limits for floating point data types are as follows: 4.0E-75 <=abs(float variable)<7.0E75
|
|
Variable Substitution |
A FastExport variable can be substituted wherever substitution is allowed. |
The utility variable can be substituted wherever substitution is allowed.
If the expression evaluates to a numeric value, the symbol is assigned an integer value, as in:
.SET FOONUM TO -151 ;
If the expression is a quoted string, the symbol is assigned a string value, as in:
.SET FOOCHAR TO '-151' ;
The minimum and maximum limits for Floating Point data types are as follows:
4.0E-75 <=abs(float variable)<7.0E75
Teradata FastExport supports concatenation of variables, using the SET command, such as:
.SET C TO 1;
.SET D TO 2;
.SET X TO &C.&D;
In this example, X evaluates to 12. If a decimal point is added to the concatenated variables, as in:
.SET C TO 1;
.SET D TO 2;
.SET X TO &C..&D;
X then evaluates to 1.2.