This is attribute of <table_name>Query.java class. It is a flag that indicates whether the returned query results should be unique or not. If true, only unique results are returned, otherwise, all results are returned.
This attribute is private. The public methods that work with this attribute are also in the <table_name>Query.java class and they are:
public void setUnique (boolean newUnique)
Sets the unique attribute to value newUnique.
public boolean getUnique()
Returns the current value of unique attribute.The default value of this attribute is false.