26 #ifndef __TERRALIB_DATAACCESS_INTERNAL_ISNULL_H
27 #define __TERRALIB_DATAACCESS_INTERNAL_ISNULL_H
84 #endif // __TERRALIB_DATAACCESS_INTERNAL_ISNULL_H
A base class for unary functions.
A base class for unary functions.
This is an abstract class that models a query expression.
TE_DEFINE_VISITABLE IsNull(Expression *arg)
Constructor.
Tells if a value is NULL.
#define TE_DEFINE_VISITABLE
IsNull(const Expression &arg)
Constructor.
A static class with global function name definitions.
#define TEDATAACCESSEXPORT
You can use this macro in order to export/import classes and functions from this module.
A static class with global function name definitions.