QlikView Reference Manual.pdf - QlikCommunity - QlikView

Note!
A dollar-sign expansion is limited in how many macro expansions it can calculate. Any expansion over
1000 will not be calculated!
Dollar-Sign Expansion Using a Variable
When using a variable for text replacement in the script or in an expression, the syntax
$( variablename )
is used. $(variablename) expands to the value in variablename. If variablename does not exist the expansion
will be the empty string.
For numeric variable expansions, the syntax
$( variablename )
is used. $( variablename ) always yields a legal decimal-point reflection of the numeric value of variablename,
possibly with exponential notation (for very large/small numbers). If variablename does not exist
or does not contain a numeric value, it will be expanded to 0 instead.
Example:
Examples:
After execution of the following script:
SET DecimalSep=',';
LET X = 7/2;
$(X ) will expand to 3,5 while $(#X ) will expand to 3.5.
set Mypath=C:\MyDocs\Files\
...
load * from $(MyPath)abc.csv;
set CurrentYear=1992;
...
select * from table1 where Year=$(CurrentYear);
Dollar-Sign Expansion with Parameters
Parameters can be used in variable expansions. The variable must then contain formal parameters, such as $1,
$2, $3 etc. When expanding the variable, the parameters should be stated in a comma separated list.
Examples:
set MUL=’$1*$2’;
set X=$(MUL(3,7)); // returns '3*7' in X
let X=$(MUL(3,7)); // returns 21 in X
If the number of formal parameters exceeds the number of actual parameters only the formal parameters corresponding
to actual parameters will be expanded. If the number of actual parameters exceeds the number of
formal parameters the superfluous actual parameters will be ignored.
Examples:
set MUL=’$1*$2’;
set X=$(MUL); // returns '$1*$2' in X
set X=$(MUL(10)); // returns '10*$2' in X
let X=$(MUL(5,7,8)); // returns 35 in X
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