waclaw wrote:It's not possible to nest one variable in another. I have variables like HOST, PORT and DATABASE, and I would like to create CONNECTION variable by specifying: jdbc:mysql://%HOST%:%PORT%/%DATABASE%
Because of the many different types of substitution variables, such a feature could easily lead into confusion. In case of mutual referencing (recursively nested) substitution variables, we could also run into a never ending looping process while trying to resolve the actual value.
Since substitution variables are defined in a single dialog for each project, we think its justifiable and saver if you define them without the possibility of nested variables. In your case you would have to retype the actual values of HOST, PORT and DATABASE in order to create the CONNECTION variable.