The breakpoint() function accepts no argument and prints out all global and local variables.

The iif(boolean, <any type>, <any type>) function accepts three arguments: one is boolean and two are of any data type. Both argument data types and return type are the same.

The function takes the first argument and returns the second if the first is true or the third if the first is false.

The isnull(<any type>) function takes one argument and returns a boolean value depending on whether the argument is null (true) or not (false). The argument may be of any data type.

Important

If you set the Null value property in metadata for any string data field to any non-empty string, the isnull() function will return true when applied on such string. And return false when applied on an empty field. For example, if field1 has Null value property set to "<null>", isnull($0.field1) will return true on the records in which the value of field1 is "<null>" and false on the others, even on those that are empty. See Null value for detailed information.

The nvl(<any type>, <any type>) function accepts two arguments of any data type. Both arguments must be of the same type. If the first argument is not null, the function returns its value. If it is null, the function returns the default value specified as the second argument.

The nvl2(<any type>, <any type>, <any type>) function accepts three arguments of any data type. This data type must be the same for all arguments and return value. If the first argument is not null, the function returns the value of the second argument. If the first argument is null, the function returns the value of the third argument.

The print_err(<any type>) function accepts one argument of any data type. It takes this argument and prints out the message on the error output.

	Note
	Remember that if you are using this function in any graph that runs on CloudConnect Server, the message is saved to the log of Server (e.g., to the log of Tomcat). Use the print_log() function instead. It logs error messages to the console even when the graph runs on CloudConnect Server.

The print_err(type, boolean) function accepts two arguments: the first is of any data type and the second is boolean. It takes them and prints out the message and the location of the error (if the second argument is true).

	Note
	Remember that if you are using this function in any graph that runs on CloudConnect Server, the message is saved to the log of Server (e.g., to the log of Tomcat). Use the print_log() function instead. It logs error messages to the console even when the graph runs on CloudConnect Server.

The print_log(level, <any type>) function accepts two arguments: the first is a log level of the message specified as the second argument, which is of any data type. The first argument is one of the following: debug, info, warn, error, fatal. The log level must be specified as a constant. It can be neither received through an edge nor set as variable. The function takes the arguments and sends out the message to a logger.

	Note
	Remember that you should use this function especially in any graph that would run on CloudConnect Server instead of the print_err() function which logs error messages to the log of Server (e.g., to the log of Tomcat). Unlike print_err(), print_log() logs error messages to the console even when the graph runs on CloudConnect Server.

The print_stack() function accepts no argument and prints out all variables from the stack.

The raise_error(string) function takes one string argument and throws out error with the message specified as the argument.